Information Circulars

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 161 (FEBRUARY 2007) NEW ORBITS ADS Name P (yr) T e W(2000) 2007 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2008 --------------------------------------------------------------------------------------- 1321 A 2320 37.29 1997.49 0.711 74.4 270.9 0.198 DOCOBO 01409+1117 9.6541 0.156 59.2 54.2 1995.92 273.0 0.203 et al. (*) - HDS 433 212.0 2003.2 0.66 332.3 79.9 0.255 RICA 03272+0944 1.6981 1.21 57.0 60.7 2000.7595 94.0 0.288 4076 A 1034 476.40 2311.52 0.297 126.2 139.4 0.915 CVETKOVIC 05322+7049 0.7557 1.028 103.4 164.3 1995.770 139.2 0.923 4371 BU 560 811.2 1860.66 0.644 139.5 126.0 1.65 SCARDIA 05474+2939 0.4438 1.520 129.7 242.5 2007.083 125.8 1.65 et al. (**) - MCA 26 117.74 1984.28 0.559 145.8 201.2 0.030 ZIRM 06255+2320 3.0576 0.153 81.6 311.6 1996.8691 211.7 0.028 7074 A 2554 83.61 1986.30 0.218 148.5 280.0 0.256 ZIRM 08539+0149 4.3057 0.361 124.7 129.9 1996.8665 275.1 0.249 - COP 2 319.71 2014.28 0.635 117.6 129.3 0.292 ZIRM 15227-4441 1.1260 0.756 119.8 21.3 2000.40 126.4 0.291 - COU 490 100.1 2007.34 0.151 1.7 305.0 0.131 DOCOBO & 16450+2928 3.5960 0.218 130.1 68.8 2005.520 298.4 0.127 TAMAZIAN 10769 STF2205 1971.12 2031.29 0.720 158.5 359.1 1.105 CVETKOVIC 17457+1743 0.1826 3.885 48.3 246.4 2002.491 0.2 1.091 - COU1785 45.72 1995.00 0.483 52.8 1.9 0.084 DOCOBO 18035+4032 7.8740 0.135 65.7 147.0 2005.515 8.5 0.094 & LING 11033 A 2257 333. 1988.73 0.829 13.6 27.0 0.154 DOCOBO & 18044+0337 1.0827 0.324 73.5 274.3 2005.520 27.7 0.157 TAMAZIAN - COU 327AB 42.46 1986.60 0.577 68.0 239.6 0.119 DOCOBO 20216+1930 8.4786 0.147 85.0 303.0 2005.516 240.5 0.129 & LING 16072 HU 983 132.43 2005.27 0.745 144.7 55.1 0.019 ZIRM 22339+6550 2.7184 0.185 68.7 226.0 1998.7795 98.3 0.029 16270 STF2944AB 1160.28 2080.72 0.755 4.3 298.3 1.947 ZIRM 22478-0414 0.3103 4.119 43.8 42.5 2005.8120 299.0 1.934 16633 BU 1220BC 83.61 1950.98 0.448 104.1 103.7 0.616 ZIRM 23159-0905 4.3057 0.469 87.0 145.0 1986.72 103.8 0.610 16648 HU 497BC 194.9 2071.80 0.357 62.0 87.7 0.296 LING 23175+1652 1.8467 0.379 109.2 92.0 2003.712 86.8 0.301 (*) DOCOBO, ANDRADE & CAMPO (Visual-Spectroscopic orbit) (**) SCARDIA, PRIEUR, PANSECCHI & ARGYLE PAPERS PUBLISHED IN 2006

ABAD, C.; BONGIOVANNI, A. & GUILLEN, Y. (Editors): Third International Meeting of Dynamic Astronomy in Latin America (ADeLA-2004). Rev. Mex. A. A.(SC) Vol 25 (2006).
ABT, H. A. & WILLMARTH, D.: The Secondaries of Solar-Type Primaries. I. The Radial Velocities. Astrophys. J. Sup. Ser. 162 (1), 207 (2006).
ALZNER, A.: Micrometer Measurements from 2004.94 to 2005.96. The Webb Soc. Double Star Section Cir. 14, 6 (2006).
ARGYLE, R.: Micrometer Measurements from 2005.0 to 2006.0. The Webb Soc. Double Star Section Cir. 14, 1 (2006).
ARMSTRONG, J. T. et al.: The Hyades binary theta 2 Tauri: Confronting evolutionary models with optical interferometry Astron. J. 131 (5), 2643 (2006)
AUSSELOOS, M. et al.: High-precision Elements of Double-lined Spectroscopic Binaries from Combined Interferometry and Spectroscopy. Astron. Astrophys. 454 (1), 259 (2006).
BAGNUOLO, W. G. et al.: First Results from the CHARA Array. V. Binary Star Astrometry: The Case of 12 Persei. Astron. J. 131 (5), 2695 (2006).
BAINES, D. et al.: On the Binarity of Herbig Ae/Be Stars. Monthly Notices 367 (2), 737 (2006)
BALEGA, I. I. et al.: Orbits of New Hipparcos Binaries. II. Astron. Astrophys. 448 (2), 703 (2006).
BALEGA, I. I. et al.: Speckle interferometry of nearby multiple stars. III. Bull. Special Astrophys. Obs., 59, 20 (2006).
BASRI, G. & REINERS, A.: A Survey for Spectroscopic Binaries Among Very Low Mass Stars Astron. J. 132 (2), 663 (2006).
BODEN, A. F.; TORRES, G. & LATHAM, D. W.: A Physical Orbit for the High Proper Motion Binary HD 9939. Astrophys. J. 644 (2), 1193 (2006).
BOUY, H. et al.: Multiplicity of Very Low-Mass Objects in the Upper Scorpius OB Association: a possible wide binary population. Astron. Astrophys. 451 (1), 177 (2006).
BOYAJIAN, T. S. et al: The B Supergiant Components of the Double-lined Binary HD 1383. Astrophys. J. 646 (2), 1209 (2006).
BRANDEKER, A.; JAYAWARDHANA, R. & KHAVARI, P.: Deficit of Wide Binaries in the eta Chamaeleontis Young Cluster. Astrophys. J. 652 (2), 1572 (2006).
CATALA, C.; FORVEILLE, T. & LAI, O.: Adaptative Optics Observations of the Binary Star HD 43587 Astron. J. 132 (6), 2318 (2006)
CHRISTOU, J. C. & DRUMMOND, J. D.: Measurements of Binary Stars, Including Two New Discoveries, With the Lick Observatory Adaptative Optics System Astron. J. 131 (6), 3100 (2006)
CORREIA, S. et al.: A VLT/NACO Survey for Triple and Quadruple Systems Among Visual Pre-main Sequence Binaries. Astron. Astrophys. 459 (3), 909 (2006).
CVETKOVIC, Z. et al: CCD Measurements of Double and Multiple Stars at NAO Rozhen. II. Serv. A. J. 172, 53 (2006).
CVETKOVIC, Z. & NOVAKOVIC, B.: Orbits for Sixteen Binaries. Serv. A. J. 173, 73 (2006).
DESIDERA, S. et al.: Spectroscopic Characterization of a Sample of Southern Visual Binaries. Astron. Astrophys. 454 (2), 553 (2006).
DIONNE, D. & ROBERT, C.: Evolutionary Synthesis Models of Young Star-forming Regions: The Influence of Binary Stars. Astrophys. J. 641 (1), 252 (2006).
DOCOBO, J. A. & Andrade, M.: A Methodology for the Description of Multiple Stellar Systems with Spectroscopic Subcomponents. Astrophys. J. 652 (1), 681 (2006).
DOCOBO, J. A. et al.: Speckle Measurements and Differential Photometry of Visual Binaries with the 6 Meter Telescope of the Special Astrophysical Observatory. Astron. J. 132 (3), 994 (2006).
DONNISON, J. R.: The Hill Stability of a Binary or Planetary System During Encounters with a Third Inclined Body. Monthly Notices 369 (3), 1267 (2006)
DUCHENE, G. et al.: Accurate Stellar Masses in the Multiple System T Tauri. Astron. Astrophys. 457 (1), L9 (2006).
EGGLETON, P. P. & KISSELEVA-EGGLETON, L.: A Mechanism for Producing Short-Period Binaries. Astrophys. Space Science 304 (1-4), 75 (2006).
EVANS, N. R. et al: Cepheids in Multiple Systems: ADS 14859. Pub. Astron. Soc. of the Pacific 118 (849), 1545 (2006).
FEIGELSON, E. D. et al.: 51 Eridani and GJ 3305: A 10-15 Myr Old Binary Star System at 30 Parsecs Astron. J. 131 (3), 1730 (2006)
FEKEL, F. C. & HENRY, G. W.: Spectroscopy and Photometry of the Double-Lined Binary HD 149420 Astron. J. 131 (3), 1724 (2006)
FEKEL, F. C. et al.: HD 131861, a Double-Line Spectroscopic Triple System Astron. J. 132 (5), 1910 (2006)
FOELLMI, C.; MOFFAT, A.F.J. & MARCHENKO, S.V.: The Massive Eclipsing LMC Wolf-Rayet Binary BAT99-129 - I. Orbital Parameters, Hydrogen Content and Spectroscopic Characteristics. Astron. Astrophys. 447 (2), 667 (2006).
FRASCA, A. et al.: Newly Discovered Active Binaries in the RasTyc Sample of Stellar X-ray Sources - I. Orbital and Physical Parameters of Six New Binaries. Astron. Astrophys. 454 (1), 301 (2006).
GAMEN R. et al.: The First Orbital Solution for the Massive Colliding-Wind Binary HD 93162 (WR 25). Astron. Astrophys. 460 (3), 777 (2006).
GATEWOOD, G. & HAN, I.: An Astrometric Study of Procyon Astron. J. 131 (2), 1015 (2006)
GELINO, C. R.; KULKARNI, S. R. & STEPHENS D. C. : Evidence of Orbital Motion in the Binary Brown Dwarf Kelu-1AB. Pub. Astron. Soc. of the Pacific 118 (842), 611 (2006).
GOLDIN, A. & MAKAROV. V. V.: Unconstrained Astrometric Orbits for Hipparcos Stars with Stochastic Solutions. Astrophys. J. Sup. Ser. 166 (1), 341 (2006).
GONZALEZ, J. F. & LEVATO, H.: Separation of Composite Spectra: the Spectroscopic Detection of an Eclipsing Binary Star. Astron. Astrophys. 448 (1), 283 (2006).
GONZALEZ, J. F. et al.: AO Velorum: a Young Quadruple System with a ZAMS Eclipsing BpSi Primary . Astron. Astrophys. 449 (1), 327 (2006).
GRIFFIN, R. E. M.; GRIFFIN, R. F. & STICKLAND, D. J.: Composite Spectra Paper 14: HR 1129, a Long-Period Binary Showing Evidence of Circumbinary Material. Monthly Notices 373 (4), 1351 (2006).
GRIFFIN, R. F. : Spectroscopic Binary Orbits from Photoelectric Radial Velocities - Paper 186: 56 Pegasi. The Observatory 126, 1 (2006).
GRIFFIN, R. F. : Spectroscopic Binary Orbits from Photoelectric Radial Velocities - Paper 187: HR 3936 and HD 100215. The Observatory 126, 119 (2006).
GRIFFIN, R. F. : Spectroscopic Binary Orbits from Photoelectric Radial Velocities - Paper 188: HD 14544, HDE 237201, 66 Orionis, HD 216218, and HD 220102. The Observatory 126, 186 (2006).
GRIFFIN, R. F. : Spectroscopic Binary Orbits from Photoelectric Radial Velocities - Paper 189: HD 14415, HR 3112, and HR 4454. The Observatory 126, 265 (2006).
GRIFFIN, R. F. : Spectroscopic Binary Orbits from Photoelectric Radial Velocities - Paper 190: HD 109484, HD 110376, HD 119334, and HD 120531. The Observatory 126, 318 (2006).
GRIFFIN, R. F. : Photoelectric Radial Velocities, Paper XVII The Orbits of 30 Spectroscopic Binaries in the Southern Clube Selected Areas. Monthly Notices 371 (3), 1159 (2006).
GRIFFIN, R. F. & BOFFIN, H. M. J.: Spectroscopic Binary Orbits from Photoelectric Radial Velocities - Paper 191: HD 17310, HD 70645, and HD 80731. The Observatory 126, 401 (2006).
GRIFFIN, R. F. & CORNELL, A. P.: Photoelectric Radial Velocities, Paper XVI 625 Ninth-Magnitude K0 Stars in the Six Southern Clube Selected Areas. Monthly Notices 371 (3), 1140 (2006).
HENRY, G. W. et al.: HD 71636, a Newly Discovered Eclipsing Binary Astron. J. 132 (6), 2489 (2006)
HERBIG, G. H. & GRIFFIN, R. F.: theta 1 Orionis E as a Spectroscopic Binary Astron. J. 132 (5), 1763 (2006)
HILLWIG, T. C. et al: Binary and Multiple O-Type Stars in the Cassiopeia OB6 Association. Astrophys. J. 639 (2), 1069 (2006).
HORCH, E. P. et al.: Speckle Interferometry of Southern Double Stars. III. Measures from the CESCO Observatory, 1994-1996 Astron. J. 131 (2), 1000 (2006)
HORCH, E. P. et al.: CCD Speckle Observations of Binary Stars from the Southern Hemisphere. IV. Measures During 2001 Astron. J. 131 (6), 3008 (2006)
HORCH, E. P. et al.: Fourier Analysis of Hubble Space Telescope Fine Guidance Sensor Data of Binary Stars and Application to the Multiple System HD 1547948 Astron. J. 132 (2), 836 (2006)
HORCH, E. P.; FRANZ, O. G. & VAN ALTENA, W. F.: Characterizing Binary Stars Below the Diffraction Limit with CCD-based Speckle Imaging Astron. J. 132 (6), 2478 (2006)
KHALIULLIN, KH. F. & KHALIULLINA, A. I.: Apsidal motion and the third-body problem in the binary HS Her. Astron. Reports 50 (10), 814 (2006).
KIYAEVA, O. V.: Astrometric Study of the Triple Star ADS 9173. Astron. Lett. 32 (12), 836 (2006).
KOHLER, R. et al.: Binary stars in the Orion Nebula Cluster. Astron. Astrophys. 458 (2), 461 (2006).
LAW, N. M.; HODGKIN, S. T. & MACKAY, C.D.: Discovery of Five Very Low Mass Close Binaries, Resolved in the Visible with Lucky Imaging. Monthly Notices 368 (4), 1917 (2006)
LIBICH, J. et al.: The New Orbital Elements and Properties of epsilon Persei. Astron. Astrophys. 446 (2), 583 (2006).
LUCY, L. B.: Spectroscopic Binaries With Components of Similar Mass. Astron. Astrophys. 457 (2), 629 (2006).
MALKOV, O. Y. et al.: A Catalogue of Eclipsing Variables. Astron. Astrophys. 446 (2), 785 (2006).
MARTIN, E. L. et al.: Resolved Hubble Space Spectroscopy of Ultracool Binary Systems. Astron. Astrophys. 456 (1), 253 (2006).
MASON, B. D. et al.: Speckle Interferometry at the US Naval Observatory. XI.. Astron. J. 131 (5), 2687 (2006).
MASON, B. D. et al.: Speckle Interferometry at the US Naval Observatory. XII. Astron. J. 132 (5), 2219 (2006).
McELWAIN, M. W. & BURGASSER, A. J.: Resolved Spectroscopy of M Dwarf/L Dwarf Binaries. II. 2MASS J17072343-0558249AB Astron. J. 132 (5), 2074 (2006)
MELIKIAN, N. D.; TAMAZIAN, V. S. & KARAPETIAN, A. A..: Spectral and Photographic Studies of the Known T Association in the Neighborhood of Cyg OB7 Ap 49, 320 (2006).
MELIKIAN, N. D. et al.: Spectral study of the flare star EV Lac Ap 49, 488 (2006).
MONTAGNIER, G. et al.: Five New Very Low Mass Binaries. Astron. Astrophys. 460 (2), L19 (2006).
MUGRAUER, M. et al.: A Search for Wide Visual Companions of Exoplanet Host Stars: The Calar Alto Survey. Astron. Nach. 327 (4), 321 (2006).
MUTERSPAUGH, M. W. et al: PHASES Differential Astrometry and Iodine Cell Radial Velocities of the Pegasi Triple Star System. Astrophys. J. 636 (2), 1020 (2006).
MUTERSPAUGH, M. W. et al: Limits to Tertiary Astrometric Companions in Binary Systems. Astrophys. J. 653 (2), 1469 (2006).
NEILL, I. et al: 2MASS J22521073-1730134: A Resolved L/T Binary at 14 Parsecs. Astrophys. J. 639 (2), 1114 (2006).
NOVAKOVIC, B. & TODOROVIC, N.: Orbits of Four Double Stars. Serv. A. J. 172, 21 (2006).
OLEVIC, D. & CVETKOVIC Z.: Dynamical Masses of the Components in o Andromedae Astron. J. 131 (3), 1723 (2006)
PHAN-BAO, N. et al: LP 714-37: A Wide Pair of Ultracool Dwarfs Actually Is a Triple. Astrophys. J. Lett. 645 (2), L153 (2006).
POGODIN, M. A. et al.: The Herbig B0e Star HD 53367: Circumstellar Activity and Evidence of Binarity. Astron. Astrophys. 452 (2), 551 (2006).
PRIEUR, J.-L.; CARQUILLAT, J.-M. & GRIFFIN, R. F.: Contribution to the Study of Binaries with Spectral Types F, G, K, and M - XI. Orbital Elements of Three Red-Giant Spectroscopic Binaries: HR 1304, HR 1908, and HD 126947. Astron. Nach. 327 (7), 686 (2006).
PRIEUR, J.-L.; CARQUILLAT, J.-M. & IMBERT, M.: Contribution to the Search for Binaries Among Am Stars - VII. Orbital Elements of Seven New Spectroscopic Binaries, Implications on Tidal Effects. Monthly Notices 372 (2), 703 (2006)
RAGHAVAN, D. et al.: Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems. Astrophys. J. 646 (1), 523 (2006).
RUCINSKI, S. M. & DUERBECK, H. W.: Radial Velocity Studies of Southern Close Binary Stars. I. Winter Systems Astron. J. 132 (4), 1539 (2006)
SCARDIA, M. et al.: Speckle observations with PISCO in Merate - II. Astrometric measurements of visual binaries in 2004. Monthly Notices 367 (3), 1170 (2006)
SCARDIA, M. et al.: Speckle Observations with PISCO in Merate - III. Astrometric Measurements of Visual Binaries in 2005 and Scale Calibration with a Grating Mask. Monthly Notices MNRAS.tmp.1331S (2006).
SCHAEFER, G. H. et al.: Dynamical Mass Estimates for Incomplete Orbits: Young Multiple Stars in Taurus and Ophiuchus. Astron. J. 132 (6), 2618 (2006)
SHAKHOVSKOJ, D. et al.: Photopolarimetric Activity and Circumstellar Environment of the Young Binary System DF Tau. Astron. Astrophys. 448 (3), 1075 (2006).
SIMON, M.; BENDER, C. & PRATO, L.: The Gl569 Multiple System. Astrophys. J. 644 (2), 1183 (2006).
TAMAZIAN, V. S. & DOCOBO, J. A.: Orbits and Differencial Photometry for Visual Binaries A 1529, HU 610 and COU 2031 Astron. J. 131 (5), 2681 (2006)
TAMAZIAN, V. S.: Visual Orbit, Differential Photometry and Dynamical Mass of DG Leo Astron. J. 132 (5), 2156 (2006)
TAMAZIAN, V. S. et al.: MK Classification and Dynamical Masses for Late-Type Visual Binaries. Pub. Astron. Soc. of the Pacific 118 (844), 814 (2006).
TANGO, W. J. et al.: Orbital Elements, Masses and Distance of lambda Scorpii A and B Determined with the Sydney University Stellar Interferometer and High-Resolution Spectroscopy. Monthly Notices 370 (2), 884 (2006)
THOMPSON, B. & YEELIN, T.: Duplicity in 16 Piscium Confirmed from its Occultation by 7 Iris on 2006 May 5. Pub. Astron. Soc. of the Pacific 118 (850), 1648 (2006).
THOREL, J. C. & THOREL, Y.: Mesures of visual double stars (18th series). Obs. et Travaux 63, 11 (2006).
TOKOVININ, A. et al.: Tertiary Companions to Close Spectroscopic Binaries. Astron. Astrophys. 450 (2), 681 (2006).
TOMKIN, J. & FEKEL, F. C.: New Precision Orbits of Bright Double-Lined Spectroscopic Binaries. I. RR Lyncis, 12 Bootis and HR 6169 Astron. J. 131 (5), 2652 (2006)
TORRES, G.: The Astrometric-Spectroscopic Binary System HIP 50796: An Overmassive Companion Astron. J. 131 (2), 1022 (2006)
TORRES, G.: The Multiple System HD 27638 Astron. J. 131 (3), 1702 (2006)
TORRES, G. et al: The Eclipsing Binary V1061 Cygni: Confronting Stellar Evolution Models for Active and Inactive Solar-Type Stars. Astrophys. J. 640 (2), 1018 (2006).
VARRICATT, W. P. & ASHOK, N.M.: WR 143: a Wolf-Rayet binary. Monthly Notices 365 (1), 127 (2006)
WYCOFF, G.L.; MASON, B. D. & URBAN, S. E.: Data Mining for Double Stars in Astrometric Catalogs Astron. J. 132 (1), 50 (2006).
ZHUCHKOV, R. Y.; ORLOV, V. V. & RUBINOV, A. V.: Dynamical Stability of the Quadruple Systems HD 68255/6/7 and HD 76644 Astron. Reports 50 (1), 62 (2006)
ANNOUNCEMENT The ESO workshop "Multiple Stars across the H-R Diagram" was held in Garching on July 12-15, 2005. The Proceedings of this meeting are available electronically at www.eso.org/gen-fac/meetings/ms2005/proc_papers.html Andrei Tokovinin Cerro Tololo Inter-American Observatory ****************************************************************************************** The deadline for contributions to Information Circular No. 162 is: June 15th 2007 J. A. Docobo (oadoco@usc.es) J. F. Ling (oafana@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 162 (JUNE 2007) NEW ORBITS ADS Name P (yr) T e W(2000) 2007 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2008 ------------------------------------------------------------------------------------------ 195 J 868 1089.17 1725.11 0.367 68.9 228.1 5.780 NOVAKOVIC 00152+2722 0.3305 8.477 75.2 352.8 2006.9575 228.3 5.817 287 BU 1093 471. 1844.26 0.517 132.3 117.2 0.747 LING 00209+1059 0.7643 0.545 42.4 181.6 2005.029 117.4 0.750 822 A 1903 128.43 1956.53 0.154 137.3 13.4 0.351 DOCOBO 00596-0111 2.8031 0.359 34.7 90.1 1999.8175 15.8 0.350 & LING - HDS 211 22.74 1996.99 0.462 68.8 236.6 0.289 DOCOBO 01345+7804 15.8311 0.207 127.7 28.5 2006.9412 232.1 0.283 et al.(*) 1780 A 961 143.09 2038.10 0.571 150.0 279.0 0.308 NOVAKOVIC 02202+2949 2.5159 0.294 145.4 15.6 2003.9517 277.4 0.301 - COU2682 36.70 1995.20 0.017 159.1 335.0 0.270 DOCOBO & 04258+1800 9.8093 0.270 60.1 54.4 2000.873 339.9 0.2732 TAMAZIAN 4376 STF3115 1370.0 2106.0 0.633 89.1 340.2 0.814 SCARDIA 05491+6248 0.2628 1.585 144.0 201.6 2007.195 339.6 0.811 et al.(**) 5212 HO 234 382.0 1915.26 0.345 36.2 358.7 0.575 RICA 06345-1114 0.9424 0.69 54.4 183.2 2003.9604 359.5 0.581 5841 J 703 1360.20 3235.39 0.850 96.2 113.7 9.384 CVETKOVIC 07106+1543 0.2647 12.699 113.4 177.1 2006.9583 113.6 9.446 - HDS1149 22.72 2009.24 0.115 21.8 185.0 0.237 DOCOBO 08033+5251 15.8451 0.282 124.4 252.3 2006.9447 170.1 0.200 et al.(*) 10049 H 2 19AB 2397.54 2326.84 0.675 77.5 338.8 2.918 NOVAKOVIC 16256-2327 0.1502 4.250 135.3 226.1 2001.5260 338.7 2.913 12540 MCA 55Aac 213.86 1998.00 0.256 170.4 107.1 0.376 SCARDIA 19307+2758 1.6834 0.536 154.9 39.4 2005.820 104.1 0.376 et al.(**) - DJU 4 615.26 2027.82 0.079 68.1 246.3 1.307 CVETKOVIC 19535+2405 0.5851 1.555 85.9 169.7 2003.000 246.3 1.314 - COU2416 52.26 1995.83 0.432 89.4 106.5 0.223 DOCOBO 20151+3742 6.8886 0.211 36.9 255.7 2005.5183 110.8 0.230 & LING 14783 H 1 48 81.71 2003.54 0.805 62.0 239.2 0.313 SCARDIA 21137+6424 4.4060 0.690 83.7 45.2 2005.886 240.3 0.393 et al.(**) - HDS3145 10.81 1997.67 0.488 71.2 229.2 0.081 DOCOBO 22083+2409 33.3056 0.094 151.8 311.3 2006.6897 169.9 0.048 et al.(*) - HDS3356 19.14 2005.49 0.587 144.0 322.3 0.172 DOCOBO 23334+4251 18.8088 0.256 75.5 80.3 2006.9464 328.7 0.220 et al.(*) - SLR 14 118.9 1977.61 0.275 45.1 80.8 0.842 DOCOBO 23506-5142 3.0273 0.814 156.2 202.6 2001.8701 78.4 0.855 & LING (*) DOCOBO, BALEGA & TAMAZIAN (**) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ****************************************************************************************** OTHER PAPERS PUBLISHED IN 2006 1. DOMMANGET, J.: "La Determination du Pole d'une Orbite d'Etoile Double Visuelle". Observations et Travaux, 62, 5, 2006. 2. DOMMANGET, J. & NYS, O.: "Erreurs relevees dans le Catalogue INDEX 1961,0 (Seconde serie)". Observations et Travaux, 64, 21, 2006. ****************************************************************************************** ON THE POSSIBLE EXISTENCE OF A VERY LOW-MASS OBJECT IN THE TRIPLE STELLAR SYSTEM GLIESE 22 (HIP 2552) Hierarchical triple system Gl 22 consists of three red dwarfs Aa, Ab and B. The orbital period of the inner orbit (pair Aa-Ab) is 15.64 yr, whereas that of the outer one (B relative to the mass center of Aa-Ab) is 223.4 yr. Both orbits are coplanar. When determining the outer orbit, a weak sinusoidal pattern in the apparent motion of the component B has been noticed. It can be attributed to either a very unusual distribution of observational residuals or an unseen fourth body in the system. In the latter case, the star B would consist of the components Ba and Bb. Under assumption of Bb to be a very low-mass object of 0.015 Msun (16 Mjupiter) on a circular orbit around Ba with a period of ~15 yr, semimajor axis 0".35 and coplanar with other two orbits, the observational residuals of the outer orbit are improved. In such case, the component Ba would be moving relative to the mass center of the virtual pair Ba-Bb on an orbit with a semimajor axis of 0".03. These motions are illustrated in the attached Fig. 1 on which blue line corresponds to the orbit of the Ba-Bb mass center relative to that of Aa-Ab and the red one shows the motion of the component Ba affected by the virtual component Bb. Similar to all visual, photographic and CCD observations, a single speckle measurement marked as "speckle (LC)" had initially been showing the position of B relative to the light center of Aa-Ab. For the orbits calculation, all such measurements have been reduced to the mass center of Aa-Ab. J.A. Docobo, V.S. Tamazian, Y.Y. Balega, M. Andrade, D. Schertl, G. Weigelt, and P. Campo ****************************************************************************************** OMER NYS (1931-2007) Born on 1 September 1931 at Tamise (Belgium), Omer NYS suddenly died at home in UCCLE (Brussels) on 20 January 2007, leaving behind him a lot of regrets and sadness. He became a member of the Royal Observatory of Belgium on 1 April 1952 in the "assistant category" to the Scientific Staff and was directed to the Equatorial's Department under the leadership of Dr. Sylvain AREND. He brightly passed the foreseen examinations to "climb" its successive degrees. His excellent basic formation permits to initiate him very early with the various computation methods in astrometry, particularly in visual double star astronomy. Omer was thus logically conducted to acquire good knowledge in celestial mechanics and to participate in orbit computations. He also was involved in various shared domains as the computation of stellar masses and dynamical parallaxes as well as of the relative radial velocities of the components of a binary. He actively contributed in our researches leading to the discovery of a particular spatial organization of the visual double stars orbital planes (J. Dommanget, 2005). His carrier has been exemplary as well by his desire to acquire some new competencies than by his steadiness in work. Having not been aware of such qualities of our collaborator, we would not have accepted the invitation made at a meeting at the Institut d'Astrophysique of Paris on april 15 1980, to collaborate in recording the available astrometric, photometric and spectroscopic data about the visual double stars needed to assure their correct observation by the HIPPARCOS satellite of the European Space Agency (ESA). This was a challenge, but it was with enthusiasm that we created the "Catalogue of the components of Double and Multiple stars - CCDM" (J. DOMMANGET & O. NYS, 1994), a more adapted version to the need of the mission, than the Index Catalogue of H. M. JEFFERS & W. H. van den BOS, managed at the time by our USNO colleague C. E. WORLEY. This has probably been our most extended collaboration on a common subject. Seeing that the satellite had completed his mission and the results being published (ESA, 1997), Omer Nys finally - almost alone - pursued the completion of the CCDM beyond his retirement and to this sorrowed day of January 20, 2007. Many other important activities should be mentioned, as for instance his important collaboration in the development by S. AREND of his own researches on the "Orthogonal Polynomia". Omer was an upright, guarded and pleasant colleague. All our sympathy goes to his wife and his family. J. Dommanget ****************************************************************************************** The deadline for contributions to Information Circular No. 163 is: October 15th 2007 J. A. Docobo (oadoco@usc.es) J. F. Ling (oafana@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 163 (OCTOBER 2007) NEW ORBITS ADS Name P (yr) T e W(2000) 2007 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2008 ------------------------------------------------------------------------------------------ 450 A 111 AB 21.38 1947.17 0.020 104.5 156.7 0.156 BRENDLEY 00321-0511 16.8382 0.172 150.0 18.7 1994.7083 139.5 0.161 & HARTKOPF 504 A 914 467. 1905.32 0.107 35.3 24.2 0.436 LING 00366+5609 0.7709 0.468 118.2 291.9 2005.034 23.8 0.435 865 MLR 87 55.97 2020.45 0.513 139.7 29.0 0.240 BRENDLEY 01036+6341 6.4320 0.238 145.1 246.4 2003.9517 24.4 0.233 & MASON 1538 STF 186 165.72 1892.28 0.726 219.7 65.0 0.906 BRENDLEY 01559+0151 2.1723 0.986 72.4 40.2 2006.9180 65.6 0.888 & MASON 3032 A 469 124.87 1968.61 0.885 236.8 320.3 1.723 BRENDLEY 04093-0756 2.8830 0.2986 65.5 277.0 1996.8984 321.4 1.736 & MASON ** - CHR 17 13.93 1995.87 0.600 125.3 290.7 0.168 CVETKOVIC 04340+1510 25.8455 0.150 45.4 297.9 2001.7531 304.7 0.135 3389 A 1014 74.83 1969.67 0.465 111.9 10.2 0.349 BRENDLEY 04430+5712 4.8109 0.244 13.0 78.8 1999.8859 12.3 0.348 & HARTKOPF - BTZ 1Aa 18.75 1992.57 0.297 120.9 265.0 0.040 CVETKOVIC 06290+2013 19.1992 0.081 72.9 228.4 1997.1366 281.9 0.053 5625 A 2681 208.33 1938.47 0.793 118.2 329.9 0.442 BRENDLEY 06575+0253 1.7280 0.273 119.4 339.1 1997.2000 329.6 0.445 & MASON 6796 HU 856 80.35 1949.90 0.589 185.5 299.7 0.231 BRENDLEY 08254+3723 4.4804 0.201 36.2 263.6 2004.2017 302.0 0.228 & HARTKOPF 7555 AC 5 AB 77.82 1957.65 0.736 194.7 53.1 0.585 BRENDLEY 09525-0806 4.6261 0.397 141.1 303.3 2006.3199 51.9 0.582 & HARTKOPF 7952 A 2373 100.26 1980.77 0.816 130.3 227.7 0.188 BRENDLEY 10520+1606 3.5907 0.172 135.5 101.6 1993.9260 226.5 0.191 & HARTKOPF 8231 STF1555 AB 916. 2024.45 0.664 150.0 148.8 0.699 DOCOBO 11363+2747 0.3930 1.935 85.7 26.8 2005.357 149.0 0.698 & LING 9019 STF1781 261.6 1975.93 0.638 0.5 187.3 0.867 ALZNER 13461+0507 1.3762 0.998 42.1 68.9 2006.32 188.3 0.882 9343 STF1865 122.98 1898.50 0.985 5.9 296.2 0.609 ALZNER 14411+1344 2.9273 0.892 125.0 249.4 2007.39 295.6 0.584 9343 STF1865 125.24 1898.58 0.980 176.5 296.9 0.65 SCARDIA 14411+1344 2.8745 0.825 126.0 61.8 2006.448 296.3 0.63 et al. (*) 9909 STF1998 AB 45.90 1997.22 0.744 25.3 347.3 0.793 DOCOBO 16044-1122 7.8431 0.654 34.5 163.8 2006.427 350.0 0.841 & LING - LAB 4 14.65 1975.44 0.029 194.6 20.3 0.099 BRENDLEY 16341+4226 24.5734 0.113 101.2 94.3 1995.4421 15.1 0.112 & HARTKOPF 10188 D 15 120.05 1895.02 0.418 145.6 52.9 0.312 ALZNER 16439+4329 2.9988 0.975 118.2 149.7 2007.54 40.2 0.311 10340 A 1146 133.81 2024.05 0.055 117.6 110.8 0.346 BRENDLEY 17036+6948 2.6906 0.411 102.0 80.3 2004.2017 110.0 0.336 & MASON 10916 BU 1299 AB 227.7 1957.09 0.712 170.0 93.3 0.288 DOCOBO 17575+1058 1.5809 0.410 58.2 126.0 1999.7251 350.0 0.841 & LING 14238 BU 64 AB 2559.04 1951.41 0.805 159.3 352.5 0.658 BRENDLEY 20450+1244 0.1407 2.677 75.1 138.6 2001.7311 352.8 0.657 & HARTKOPF - KUI 103 29.47 2007.41 0.759 164.3 211.8 0.169 DOCOBO 21000+4004 12.2158 0.614 19.5 99.2 1999.690 330.0 0.197 & LING 16131 HO 479 180.56 2010.00 0.506 95.5 60.8 0.258 BRENDLEY 22385+0218 1.9938 0.724 119.5 75.4 1998.6630 53.4 0.233 & MASON 16365 BU 178 96.48 1933.83 0.643 142.9 322.8 0.632 BRENDLEY 22552-0459 3.7313 0.481 85.7 328.3 2001.8728 323.0 0.618 & MASON 16373 HU 987 396.08 1917.63 0.415 247.2 80.1 1.060 BRENDLEY 22557+1547 0.9089 1.034 119.4 28.1 2006.5890 79.7 1.069 & HARTKOPF 16428 STT 483 249.1 2021.76 0.391 23.4 355.9 0.468 ALZNER 22592+1144 1.4452 0.710 25.6 19.3 2006.770 358.7 0.464 (*) SCARDIA, PRIEUR, PANSECCHI & ARGYLE (**) The value for the semi-major axis sent to the circular (2".435) was a typographical error and has been corrected above. ****************************************************************************************** PIERRE BACCHUS (1923-2007) An astronomer's life mainly devoted to double star astronomy Pierre BACCHUS was born the 10th of July 1923 at M'ezi`eres (Ardennes), presently called Charleville-M'ezi`eres in France near the Belgian border. He very soon showed a great interest for astronomy. During his school year 1941-1942, while studying at Lyc'ee Saint-Louis in Paris, one evening with two other students, he used a small astronomical telescope of his own to observe the satellites of Jupiter in a gymnasium of the lyc'ee. At the entrance examinations of both the Ecole Normale Sup'erieure and Ecole Polytechnique, he was rated first for the written assignments and was admitted with a prominent rank in both schools. He easily cleared his examinations step by step and at the summer 1946, Bacchus brilliantly passed the "agr'egation de physique". The subject of his thesis on the "sodium" of the nocturnal and crepuscular skies had been proposed by Alfred KASTLER. After a short stay in southern France, he went to astrometry on the advice of Andr'e DANJON and moved to the Observatoire de Strasbourg. There, he conceived very artful ocular equipment which, based on rotating spirals, permitted to measure simultaneously the angular separation and the position angle of a binary star. Unfortunately, the atmospheric turbulence blurs the images, whereas the considered equipment requires a perfect aiming on the star. BACCHUS concluded that his instrument was thus not usable on the Earth surface. Around 1964, with Pierre LACROUTE, he had the idea to go to space for doing astrometry with a very high precision. The critical problem then became that of the quality of the catalogues. Moreover, the catalogues of the northern and southern hemispheres do not join up well because they were independently realized. This idea gave rise to the conception of the Hipparcos satellite, essentially due to P. LACROUTE, but the ideas of P. BACCHUS were underlying. He was actively involved in the optical design of the satellite; his proposal to transfer of the classical corrections of the Schmidt lens to the complex mirror remains the most original one. Concerning the visual double stars, he studied their observability conditions by Hipparcos and, from 1982 to 1990, he actively participated to the working group having in charge the double star data needed for the preparation of the Hipparcos Input Catalogue. At the end of the year 1985, he therefore started a verification project of the relative positions of binaries that might be observed by the satellite. He identified and measured systems on Schmidt photographic plates taken at the European Southern Observatory (ESO) and of which a copy was available at the Royal Observatory (Belgium) where he weekly went to collaborate with the team J. Dommanget/O. Nys. These data were needed for the Catalogue of the Components of Double and Multiple stars (CCDM) of J. Dommanget, coordinator of the double star working group, and his collaborator O. Nys. In 1961, Bacchus left Strasbourg for Lille where he was successor to Vladimir Kourganoff as professor of astronomy at the University and head of the laboratory of astronomy until his retirement in 1986. A computer expert impassionate for the computer languages, in particular the Algol language, he was also creator and director of the "Laboratoire de calcul et d'informatique fondamentale de l'Universit'e de Lille". In 1973, the Conseil International de la Langue Fran,caise launched the project of a "Vocabulaire d'Astronomie". A working group of European astronomers was created and Pierre BACCHUS was chosen for conducting its work. He supervised and realized the manuscript. Therefore he devised and implemented software which enabled to justify the text on the right side. Pierre Bacchus was very much involved in the history of astronomy and was a member of the "Commission des cadrans solaires" of SAF (Soci'et'e Astronomique de France) some years after its foundation, Pierre Bacchus was one of the king-bolts of a team who published a voluminous work on the mottos of sundials. At the meeting of the Commission des Etoiles Doubles of the SAF at Lille in august 1984, Fr'ed'eric Honnart invited Pierre Bacchus to become a member of this commission as a scientific councilor. He proposed to its members to contribute to his verification project of 1985 of relative positions of the components of double stars and in 1986 and 1987, advised Pierre Durand in preparing various missions for this purpose at the observatories of Haute-Provence, Nice and Pic du Midi. Pierre Bacchus helped to the development of the double image micrometer conceived by Bernard Lyot, by investigating the birefringence of the spar plate, which is its fundamental optical component. He actively participated to the meetings of the Commission which profited by his experience as a physicist, an astronomer and a mathematician. In particular, for modeling the spreading of the stellar images in the illumination map of the field of a visual double star, he suggested, to replace an empirical formula due to Otto Franz by a more representative and simpler one. Till just before his death on May 28th, Pierre Bacchus actively participated to the working group on "radial velocities", raised up by Jean Dommanget a few years ago, with the aim to investigate the space orientation of the orbital planes of the orbital binaries, by the removal of the ambiguity on the direction of their ascending nodes. In the winter 2006-2007, he developed software in C-language of the type "data base steering" for collecting the useful observations to the program "radial velocities". When he participated to seminaries or meetings, his comments were always given with ease, acumen, an acute sense of the progression in his statements, generally without notes. His friend's amateur astronomers and his students unanimously recognize his great teaching qualities. The Commission des Etoiles Doubles has lost a kind and particularly shrewd counsellor, who brought very much during more than two decennaries, more particularly by the relevance of his remarks and commentaries on numerous talks given during the meetings. One shall keep for a long time the memory of Pierre Bacchus, a man good and generous, endowed by a prodigious capacity of assimilation and of inventing, charming in his singularity. Free translation by J. Dommanget and E. Souli'e of the paper "Hommage `a Pierre BACCCHUS" written by Jean Dommanget, Pierre Durand, Jean-Claude Pecker, Denis Savoie and Edgar Souli'e. (l'Astronomie, vol.121, p 466, 2007). ****************************************************************************************** NOTE Dr. Paul Couteau, Honorary Astronomer of the Observatoire de la C^ote d'Azur (Nice site) and past President of the IAU Commission 26 (1967- 1970), has received the "Prix Janssen 2007". This is the award of highest distinction granted by the Scientific Committee of the Soci'et'e Astronomique de France (SAF) honoring an astronomical career of exception. The Janssen Prize 2007 was handed to Paul Couteau by Audouin Dollfus, Honorary Astronomer at the Observatoire de Paris (Meudon site), a specialist of planetary surfaces and the discoverer of Saturn's satellite Janus. The ceremony was held at the Observatoire Camille Flammarion located at Juvisy-su-Orge (Essonne, France) on Saturday 02 June 2007 Edgar Souli'e President of SAF Double Stars Commission ****************************************************************************************** The deadline for contributions to Information Circular No. 164 is: February 15th 2008 J. A. Docobo (oadoco@usc.es) J. F. Ling (oafana@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 164 (FEBRUARY 2008) NEW ORBITS ADS Name P (yr) T e W(2000) 2008 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2009 ------------------------------------------------------------------------------------------ 277 A 647 372.71 1876.01 0.292 39.4 101.8 0.67 SCARDIA 00205+4531 0.9659 0.947 122.0 136.8 2006.036 100.8 0.67 et al. (**) - HDS 102 46.76 2015.92 0.730 38.6 103.5 0.137 CVETKOVIC 00469+4339 7.6995 0.229 118.7 67.2 2001.7609 96.2 0.133 1763 EGG 2 Aa 109.86 2094.27 0.540 132.6 173.2 0.225 CVETKOVIC 02186+4017 3.2770 0.344 66.0 288.7 1999.8313 175.9 0.222 4396 A 2657 60.43 1964.86 0.466 20.1 224.2 0.172 DOCOBO 05482+0137 5.9573 0.137 18.9 350.4 1999.8833 227.5 0.167 & LING - FIN 382 28.28 1992.42 0.303 179.9 330.1 0.185 CVETKOVIC 05542-2909 12.7298 0.218 113.3 45.1 1993.0951 322.4 0.161 - RST4816 28.46 2018.86 0.647 102.3 112.3 0.394 CVETKOVIC 06362-3608 12.6486 0.275 110.3 140.9 1996.1807 110.6 0.393 - FIN 322 59.59 1967.31 0.235 59.9 305.4 0.085 CVETKOVIC 06493-0216 6.0418 0.145 118.6 237.8 1997.1256 297.5 0.088 6526 A 1580 257. 2015.15 0.178 107.8 289.4 0.258 DOCOBO 08017-0836 1.4008 0.313 55.3 197.3 2003.9604 290.5 0.258 & LING - FIN 366 85.35 1965.84 0.609 149.4 36.1 0.135 CVETKOVIC 11495-4604 4.2178 0.269 73.3 83.6 1995.1027 40.0 0.132 - BLA 3 4.212 2009.443 0.569 15.3 29.9 0.147 DOCOBO 16171+5516 85.4701 0.129 107.7 119.4 2001.2711 10.7 0.099 et al. (*) 15992 HU 388 535. 1934.36 0.827 8.8 58.7 0.514 DOCOBO 22302+2228 0.6729 0.518 31.5 265.0 2005.883 59.1 0.517 & LING 16561 BU 385 AB 830. 1721.18 0.433 44.2 86.0 0.664 LING 23103+3229 0.4337 0.623 131.6 152.2 2005.821 85.8 0.666 (*) DOCOBO, TAMAZIAN & MELIKIAN (**) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ****************************************************************************************** PAPERS PUBLISHED IN 2007 1. AL-WARDAT, M. A.: Model atmosphere parameters of the binary systems COU1289 and COU1291. Astron. Nach. 328 (1), 63 (2007). 2. ANDRADE, M.: Orbit, Masses and Spectral Analysis of the Visual Binary A 2329. Rev. Mex. A. A. 43 (2) 237 (2007). 3. APAI, D. et al: Massive Binaries in High-Mass Star-forming Regions: A Multiepoch Radial Velocity Survey of Embedded O Stars. Astrophys. J. 655 (1), 484 (2007). 4. ARGYLE, R.: Micrometer Measurements from 2006.0 to 2007.0. The Webb Soc. Double Star Section Cir. 15, 1 (2007). 5. ARTIGAU, E. et al: Discovery of the Widest Very Low Mass Binary. Astrophys. J. Lett. 659 (1), L49 (2007). 6. ASADA, H., AKASAKA, T. & KUDOH, K.: Simplified Solution to Determination of a Binary Orbit Astron. J. 133 (4), 1243 (2007). 7. BAKIS, V. et al.: eta Muscae: a young detached binary with two identical components. Monthly Notices of the Royal Astronomical Society 382 (2), 609 (2007). 8. BALEGA, Y. Y. et al.: Accurate masses of low mass stars GJ 765.2AB (0.83 Msun + 0.76Msun). Astron. Astrophys. 464 (2), 635 (2007). 9. BODEN, A. F. et al.: Dynamical Masses for PreMain-Sequence Stars: A Preliminary Physical Orbit for V773 Tau A Astrophys. J. 670 (2), 1214 (2007). 10. BONAVITA, M. & DESIDERA, S.: The frequency of planets in multiple systems. Astron. Astrophys. 468 (2), 721 (2007). 11. BOYAJIAN, T. S. et al.: The Long-Period, Massive Binaries HD 37366 and HD 54662: Potential Targets for Long-Baseline Optical Interferometry. Astrophys. J. 664 (2),1121 (2007). 12. BOYAJIAN, T. S. et al.: Radial Velocities of Six OB Stars. Pub. Astron. Soc. of the Pacific 119 (857), 742 (2007). 13. BOZIC, H. et al.: HD 143418: an unusual light variable and a double-lined spectroscopic binary with a CP primary . Astron. Astrophys. 464 (1), 263 (2007). 14. BRANHAM, R. L. JR.: Calculating the Orbit of a Double Star with Visual, Speckle, and Radial Velocity Data Astron. J. 134 (1), 274 (2007). 15. BURGASSER, A. J.: Binaries and the L Dwarf/T Dwarf Transition . Astrophys. J. 659 (1), 655 (2007). 16. BURGASSER, A. J. et al: Discovery of a High Proper Motion L Dwarf Binary: 2MASS J15200224-4422419AB. Astrophys. J. 658 (1), 557 (2007). 17. CABALLERO, J. A.: Southern Very Low Mass Stars and Brown Dwarfs in Wide Binary and Multiple Systems. Astrophys. J. 667 (1), 520 (2007) 18. CABALLERO, J. A.: The widest ultracool binary. Astron. Astrophys. 462 (3), L61 (2007). 19. CARMONA, A., VAN DEN ANCKER, M. E. & HENNING, TH.: Optical spectroscopy of close companions to nearby Herbig Ae/Be and T Tauri stars. Astron. Astrophys. 464 (2), 687 (2007). 20. CARQUILLAT, J.-M. & PRIEUR, J.-L.: Contribution to the search for binaries among Am stars VIII. New spectroscopic orbits of eight systems and statistical study of a sample of 91 Am stars. Montly Notices of the Royal Astronomical Society 380 (3), 1064 (2007). 21. CARQUILLAT, J.-M. & PRIEUR, J.-L.: Contribution to the study of composite spectra: XII. Spectroscopic orbits of eight southern stars. Astron. Nach. 328 (6), 527 (2007). 22. CLOSE, L. M. et al.: The Wide Brown Dwarf Binary Oph 1622-2405 and Discovery of a Wide, Low-Mass Binary in Ophiuchus (Oph 1623-2402): A New Class of Young Evaporating Wide Binaries?. Astrophys. J. 660 (2), 1492 (2007). 23. CVETKOVIC, Z. et al.: CCD Measurements of Double and Multiple Stars at NAO Rozhen. III. Ser. A. J. 174, 83 (2007) 24. DESIDERA, S. & BARBIERI, M.: Properties of planets in binary systems - The role of binary separation. Astron. Astrophys. 462 (1), 345 (2007). 25. DESIDERA, S. et al.: Accretion of chemically fractionated material on a wide binary with a blue straggler. Astron. Astrophys. 462 (3), 1039 (2007). 26. DOCOBO, J. A. & LING, J. F.: Orbits and System Masses of 14 Visual Double Stars with Early-Type Components Astron. J. 133 (4), 1209 (2007). 27. DOCOBO, J. A. et al.: Binary Star Speckle Measurements with the 1.52-m telescope at Calar Alto . Rev. Mex. A. A. 43 (1) 141 (2007). 28. ECHEVARR'IA, J., DE LA FUENTE, E. & COSTERO, R.: U Geminorum: A Test Case for Orbital Parameter Determination Astron. J. 134 (1), 134 (2007). 29. EISENBEISS, T. et al.: Low-mass visual binaries in the solar neighbourhood: The case of HD 141272. Astron. Nach. 328 (6), 512 (2007). 30. ESPOSITO, M. et al.: MO Lup: a hierarchical triple T Tauri system. Monthly Notices of the Royal Astronomical Society 376 (4), 1805 (2007). 31. FEKEL, F. C., WILLIAMSON, M. & POURBAIX, D.: The Spectroscopic and Astrometric Orbits of HR 672 Astron. J. 133 (6), 2431 (2007). 32. FEKEL, F. C. & BOLTON, C. T.: Chromospherically Active Stars. XXVI. The Double-Lined Late-Type Binary HD 19485 = WZ Arietis Astron. J. 134 (5), 2079 (2007). 33. FRANKOWSKI, A., JANCART, S. & JORISSEN, A.: Proper-motion binaries in the Hipparcos catalogue - Comparison with radial velocity data. Astron. Astrophys. 464 (1), 377 (2007). 34. GOKHALE, V., PENG X. M. & FRANK, J.: Evolution of Close White Dwarf Binaries. Astrophys. J. 655 (2), 1010 (2007). 35. GOLDIN, A. & MAKAROV, V. V.: Astrometric Orbits for Hipparcos Stochastic Binaries. Astrophys. J. Sup. Ser. 173 (1), 137 (2007). 36. GRIFFIN, R. F. : Spectroscopic binary orbits from photoelectric radial velocities Paper 192: HD 172401. The Observatory 127, 45 (2007). 37. GRIFFIN, R. F. : Spectroscopic binary orbits from photoelectric radial velocities - Paper 193: HD 47467, HR 3451, and HD 223323. The Observatory 127, 113 (2007). 38. GRIFFIN, R. F. : Spectroscopic binary orbits from photoelectric radial velocities Paper 194: HD 113997, HD 114931, HD 115588, and HD 116880, with a preliminary discussion of HD 113995. The Observatory 127, 171 (2007). 39. GRIFFIN, R. F. : Spectroscopic binary orbits from photoelectric radial velocities Paper 195: HD 50730 B, HD 213014 B, and HR 8082 B (BD -5 1867, BD +16 4746 B, and BD +26 4074). The Observatory 127, 225 (2007). 40. GRIFFIN, R. F. : Spectroscopic binary orbits from photoelectric radial velocities Paper 196: HR 770, HD 64207, HD 187160, and HD 212790. The Observatory 127, 313 (2007). 41. GRIFFIN, R. F. : Spectroscopic binary orbits from photoelectric radial velocities Paper 197: HD 10262 and HD 116127. The Observatory 127, 379 (2007). 42. GRUNDSTROM, E. D. et al.: A Spectroscopic Study of Mass Outflows in the Interacting Binary RY Scuti Astrophys. J. 667 (1), 505 (2007). 43. GUENTHER, E. W. et al. : Pre-main sequence spectroscopic binaries suitable for VLTI observations Astron. Astrophys. 467 (3), 1147 (2007). 44. HARMANEC, P. et al.: V379 Cephei: a quadruple system of two binaries . Astron. Astrophys. 463 (3), 1061 (2007). 45. HORMUTH, F. et al.: Direct imaging of the young spectroscopic binary HD 160934. Astron. Astrophys. 463 (2), 707 (2007). 46. JANSON, M. et l.: Improved age constraints for the AB Doradus quadruple system The binary nature of AB Doradus B. Astron. Astrophys. 462 (2), 615 (2007). 47. KARAMI, K. & MOHEBI, R.: Velocity Curve Analysis of Spectroscopic Binary Stars AI Phe, GM Dra, HD 93917 and V502 Oph by Nonlinear Regression . Chinese J. Astron. Astrophys. 7 (4), 558 (2007). 48. KARAMI, K. & TEIMOORINIA, H.: Velocity curve analysis of the spectroscopic binary stars by the non-linear least squares. Astrophys. Space Science 311 (4), 435 (2007). 49. KELLERER, A. et al.: Interferometric observations of the multiple stellar system del Velorum. Astron. Astrophys. 469 (2), 633 (2007). 50. KJURKCHIEVA, D. P. & MARCHEV, D. V.: Spectroscopic and photometric observations of the eclipsing star UV Leo . Montly Notices of the Royal Astronomical Society 381 (2), 663 (2007). 51. KJURKCHIEVA, D. P., MARCHEV, D. V. & ZOLA, S.: Spectroscopic solution of the star QX Cas. Montly Notices of the Royal Astronomical Society 382 (2), 835 (2007). 52. KOBULNICKY, H. A. & FRYER, C. L.: A New Look at the Binary Characteristics of Massive Stars Astrophys. J. 670 (1), 747 (2007). 53. KONOPACKY, Q. M. et al.: New Very Low Mass Binaries in the Taurus Starforming Region. Astrophys. J. 663 (1), 394 (2007). 54. KOUWENHOVEN, M. B. N. et al.: The primordial binary population. II. - Recovering the binary population for intermediate mass stars in Scorpius OB2. Astron. Astrophys. 474 (1), 77 (2007). 55. KRAUS, A. L. & HILLENBRAND, L. A.: The Role of Mass and Environment in Multiple-Star Formation: A 2MASS Survey of Wide Multiplicity in Three Young Associations Astrophys. J. 662 (1), 413 (2007). 56. KRAUS, A. L. & HILLENBRAND, L. A.: USco J1606-1935: An Unusually Wide Low-Mass Triple System? Astrophys. J. 664 (2), 1167 (2007). 57. KRAUS, S. et al.: Visual/infrared interferometry of Orion Trapezium stars: preliminary dynamical orbit and aperture synthesis imaging of the theta 1 Orionis C system Astron. Astrophys. 466 (2), 649 (2007). 58. LAMPENS, P., STRIGACHEV, A. & DUVAL, D.: Multicolour CCD measurements of visual double and multiple stars. III. Astron. Astrophys. 464 (2), 641 (2007). 59. LANE, B. F. et al.: The Orbits of the Quadruple Star System 88 Tauri A from PHASES Differential Astrometry and Radial Velocity Astrophys. J. 669 (2), 1209 (2007). 60. LEPINE, S. et al.: An Astrometric Companion to the Nearby Metal-Poor, Low-Mass Star LHS 1589 Astrophys. J. 668 (1), 507 (2007). 61. LINDER, N. et al.: The Struve-Sahade effect in the optical spectra of O-type binaries - I. Main-sequence systems. Astron. Astrophys. 474 (1), 193 (2007). 62. LUHMAN, K. L. et al.: Ophiuchus 1622-2405: Not a Planetary-Mass Binary. Astrophys. J. 659 (2), 1629 (2007). 63. MAKAROV, V. V.: Binarity of the Nearby 30 Myr Old Solar Analog HIP 16853 in the Tucana-Horologium Stream. Astrophys. J. Lett. 654 (1), L81 (2007). 64. MAKAROV, V. V. et al: The Nearby Young Visual Binary HIP 115147 and Its Common Proper Motion Companion LSPM J2322+7847. Astrophys. J. Lett. 667 (2), L155 (2007). 65. MALKOV, O. Y.: Mass-luminosity relation of intermediate-mass stars. Montly Notices of the Royal Astronomical Society 382 (3), 1073 (2007). 66. MALMBERG, D. DAVIES, M. B. & CHAMBERS, J. E.: The instability of planetary systems in binaries: how the Kozai mechanism leads to strong planetplanet interactions. Montly Notices of the Royal Astronomical Society: Letters 377 (1), L1 (2007). 67. MARTINACHE, F. et al.: Precision Masses of the Low-Mass Binary System GJ 623 . Astrophys. J. 661 (1), 496 (2007). 68. MASON, B. D. et al.: Speckle Interferometry at the US Naval Observatory. XIII Astron. J. 134 (4), 1671 (2007). 69. McINTOSH, G. C. & RUSTAN, G.: The Orbital Elements of R Aquarii Astron. J. 134 (6), 2113 (2007). 70. MERMILLIOD, J.-C. et al.: Red giants in open clusters - XIII. Orbital elements of 156 spectroscopic binaries. Astron. Astrophys. 473 (3), 892 (2007). 71. MUGRAUER, M., NEUH "AUSER, R. & MAZEH, T.: The multiplicity of exoplanet host stars - Spectroscopic confirmation of the companions GJ 3021 B and HD 27442 B, one new planet host triple-star system, and global statistics . Astron. Astrophys. 469 (2), 755 (2007). 72. NORTH, J. R. et al.: Orbital solution and fundamental parameters of s Scorpii. Montly Notices of the Royal Astronomical Society 380 (3), 1276 (2007). 73. NOVAKOVIC, B.: Orbits for Ten visual binary stars. Chinese J. Astron. Astrophys. 7 (3), 415 (2007). 74. ORLOV, V. G. et al.: First Speckle Interferometry Measurements of Binary Stars at the OAN-Tonantzintla. Rev. Mex. A. A. 43 (1), 137 (2007). 75. PRATO, L.: A Survey for Young Spectroscopic Binary K7M4 Stars in Ophiuchus. Astrophys. J. 657 (1), 338 (2007). 76. PRIBULLA, T. et al.: Radial Velocity Studies of Close Binary Stars. XII. Astron. J. 133 (5), 1977 (2007). 77. QUINTANA, E. V. et al.: Terrestrial Planet Formation around Individual Stars within Binary Star Systems . Astrophys. J. 660 (1), 807 (2007). 78. REIPURTH, B. et al.: Visual Binaries in the Orion Nebula Cluster Astron. J. 134 (6), 2272 (2007). 79. ROBERTS, L. C. Jr., TURNER, N. H. & TEN BRUMMELAAR, T. A. : Adaptive Optics Photometry and Astrometry of Binary Stars. II. A Multiplicity Survey of B Stars Astron. J. 133 (2), 545 (2007). 80. ROELOFS, G. H. A. et al.: On the orbital periods of the AM CVn stars HP Librae and V803 Centauri. Montly Notices of the Royal Astronomical Society 379 (1), 176 (2007). 81. RUCINSKI, S. M., PRIBULLA, T. & VAN KERKWIJK, M. H.: Contact Binaries with Additional Components. III. A Search Using Adaptive Optics Astron. J. 134 (6), 2353 (2007). 82. SANA, H., RAUW, G & GOSSET, E.: Constraining the Fundamental Parameters of the O-Type Binary CPD -41 7733. Astrophys. J. 659 (2), 1582 (2007). 83. SCARDIA, M. et al.: The orbit of the visual binary ADS 8630 (fl Vir). Astron. Nach. 328 (2), 146 (2007). 84. SCARDIA, M. et al.: Speckle observations with PISCO in Merate - III. Astrometric measurements of visual binaries in 2005 and scale calibration with a grating mask. Montly Notices of the Royal Astronomical Society 374 (3), 965 (2007). 85. SCARFE, C. D., GRIFFIN, R. F. & GRIFFIN, R. E. M.: The double-lined spectroscopic binary HR 6046. Montly Notices of the Royal Astronomical Society 376 (4), 1671 (2007). 86. SIEGLER, N. et al.: Discovery of a 66 mas Ultracool Binary with Laser Guide Star Adaptive Optics Astron. J. 133 (5), 2320 (2007). 87. SINACHOPOULOS, D. et al.: CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double stars. Astron. Astrophys. 472 (3), 1055 (2007). 88. S "ODERHJELM, S.: The q = 1 peak in the mass-ratios for Hipparcos visual binaries. Astron. Astrophys. 463 (2), 683 (2007). 89. TERRELL, D., MUNARI, U. & SIVIERO, A.: Observational studies of early-type binary stars: VV Orionis. Montly Notices of the Royal Astronomical Society 374 (2), 530 (2007). 90. TOBAL, T.: Measures of 1027 neglected visual double stars. The Webb Soc. Double Star Section Cir. 15, 29 (2007). 91. TOKOVININ, A. A. & GORYNYA, A. A.: New spectroscopic components in multiple systems. V. Astron. Astrophys. 465 (1), 257 (2007). 92. TOMKIN, J., GRIFFIN, R. F. & ALZNER, A.: Orbits of Hyades multiple-lined spectroscopic binaries - Paper 5: The quadruple system HD 30869 (van Beuren 124). The Observatory 127, 87 (2007). 93. TORRES, G.: Astrometric-Spectroscopic Determination of the Absolute Masses of the HgMn Binary Star OE Herculis Astron. J. 133 (6), 2684 (2007). 94. TORRES, G.: Hipparcos Astrometric Orbit and Evolutionary Status of HR 6046 Astron. J. 134 (5), 1916 (2007). 95. TORRES, G., LATHAM, D. W. & STEFANIK, R. P.: Cross-Correlation in Four Dimensions: Application to the Quadruple-lined Spectroscopic System HD 110555 Astrophys. J. 662 (1), 602 (2007). 96. VERRIER, P. E. & EVANS, N. W.: Planetary stability zones in hierarchical triple star systems. Montly Notices of the Royal Astronomical Society 382 (4), 1432 (2007). 97. WU, Y., MURRAY, N. W. & RAMSAHAI, J. M.: Hot Jupiters in Binary Star Systems Astrophys. J. 670 (1), 820 (2007). 98. ZAVALA, R. T. et al: The Mercury-Manganese Binary Star Herculis: Detection and Properties of the Secondary and Revision of the Elemental Abundances of the Primary. Astrophys. J. 655 (2), 1046 (2007). 99. ZHAO, M. et al: Physical Orbit for * Virginis and a Test of Stellar Evolution Models. Astrophys. J. 659 (1), 626 (2007). ****************************************************************************************** Errata in Information Circular No. 163 Dr. W. I. Hartkopf noted in the entry for WDS 04093-0756 (A 469), the value of the semi-major axis a should be 0.2986 arcsec, rather than 2.435 ****************************************************************************************** The deadline for contributions to Information Circular No. 165 is: June 15th 2008 J. A. Docobo (oadoco@usc.es) J. F. Ling (oafana@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 165 (JUNE 2008) NEW ORBITS ADS Name P (yr) T e W(2000) 2008 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2009 ------------------------------------------------------------------------------------------ - I 1477 384.1 2008.2 0.703 141.6 350.1 0.146 NOVAKOVIC 00003-4417 0.9373 1.023 75.3 246.5 2001.8729 0.5 0.117 - I 43AB 1637.7 2187.8 0.487 172.8 203.0 0.418 NOVAKOVIC 00106-7313 0.2198 2.762 95.6 13.9 1996.9008 202.2 0.427 504 A 914 1240.2 2015.1 0.477 24.7 25.4 0.461 NOVAKOVIC 00366+5609 0.2903 0.880 109.4 4.4 2005.0340 25.1 0.461 - I 47 516.5 1850.7 0.112 4.5 25.3 0.703 NOVAKOVIC 00519-4343 0.6970 1.228 77.0 298.2 2001.8619 25.8 0.693 - LDS 873 521.39 2079.31 0.711 92.5 52.7 2.556 RICA 01032+2006 0.6905 3.366 53.2 81.0 1999.6637 53.2 2.546 1199 BU 506 850.5 2040.3 0.469 32.8 61.5 0.556 NOVAKOVIC 01315+1521 0.4233 1.228 58.5 86.9 2000.6173 62.5 0.547 1554 A 1526 877.5 1919.6 0.449 112.6 194.6 0.088 NOVAKOVIC 01577+4434 0.4103 0.648 100.2 187.4 1995.9154 191.2 0.090 3711 STT 98 197.45 1976.73 0.175 88.3 303.4 0.856 SCARDIA 05079+0830 1.8233 1.005 142.8 62.8 2007.167 301.5 0.868 et al. (**) - WGT 1Ca-Cb 11.06 2007.62 0.855 58.4 238.1 0.017 DOCOBO & 05353-0523 32.5497 0.038 108.4 63.0 2008.173 226.5 0.035 TAMAZIAN - WGT 1Ca-Cb 11.07 2007.59 0.865 60.3 237.6 0.019 KRAUS 05353-0523 32.5203 0.040 107.9 65.5 2008.173 226.8 0.035 5514 STF 963AB 316.2 1961.99 0.441 51.0 330.7 0.239 SCARDIA 06531+5927 1.1385 0.614 64.7 170.3 2008.202 333.5 0.244 et al. (**) 6654 A 2471 521. 1994.30 0.620 135.1 65.9 0.235 LING 08127+2613 0.6910 0.788 131.6 28.8 2004.2035 61.9 0.236 6902 A 1078 1304. 1999.61 0.968 139.7 150.5 0.466 LING 08456+8442 0.2761 3.099 66.8 256.2 2001.0225 151.6 0.498 - R 207 194.28 1857.50 0.598 349.4 50.1 0.996 RICA 12463-6806 1.8530 0.969 37.1 209.0 2007.373 51.3 0.981 - CR Dra 4.040 2005.72 0.170 63.5 268.5 0.138 DOCOBO & 16171+5516 89.1089 0.148 119.5 299.9 2007.4870 225.9 0.125 TAMAZIAN - COU1922 49.43 2002.27 0.649 159.2 116.9 0.246 DOCOBO 17366+4827 7.2830 0.304 150.3 285.6 2006.5222 110.1 0.267 & LING 11479 STT 359 219.3 1929.08 0.839 10.0 5.3 0.733 SCARDIA 18355+2336 1.6416 0.425 119.9 197.7 2006.639 5.2 0.735 et al. (**) 11871 BU 648AB 61.18 1971.82 0.249 49.0 264.2 0.956 DOCOBO 18570+3254 5.8843 1.240 115.1 280.3 2004.659 260.3 1.006 & LING 11584 STT 363 641.9 1987.04 0.890 159.7 340.1 0.427 SCARDIA 18374+7741 0.5608 0.950 78.3 55.9 2006.727 340.4 0.441 et al. (**) - BU 1147 74.00 1870.28 0.800 159.5 7.7 0.238 RICA 23026+4245 4.8651 0.225 21.7 356.4 2003.712 10.3 0.223 16538 STT 489AB 162.8 1934.57 0.597 90.3 353.9 1.114 SCARDIA 23079+7523 2.2113 0.810 30.0 90.0 2006.869 354.7 1.116 et al. (**) (**) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== NEW DOUBLE STAR Discovered by: R. Gili with Lucky imaging at the 76 cm refractor at Nice Observatory. (This star was discovered observing COU 1886) STAR TYC Mgn Coord. 2000 Epoch theta rho nights GII 1 2461-01112-1 10.3 - 12.4 073208.32 +335232.3 2008.123 131.4 1.227 2 ========================================================================================== NOTES Others papers on double stars published in 2007 * DOMMANGET, J.: - Les 'etoiles doubles spectroscopiques dans l'environnement solaire. Bulletin de la Classe des Scientes 6th Ser XVIII (1-6), 7 (2007) ****************************************************************************************** The deadline for contributions to Information Circular No. 166 is: October 15th 2008 J. A. Docobo (oadoco@usc.es) J. F. Ling (oafana@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 166 (OCTOBER 2008) NEW ORBITS ADS Name P (yr) T e W(2000) 2008 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2009 ------------------------------------------------------------------------------------------ 2427 MLB 115 780.31 2119.72 0.017 174.6 4.4 4.949 ZIRM 03162+5810 0.4614 5.072 135.4 219.4 2005.088 4.1 4.954 2578 A 983 206.7 1985.82 0.261 139.8 147.8 0.314 DOCOBO 03310+2937 1.7417 0.388 60.2 312.9 1996.08 149.0 0.314 & LING - HDS 564 111.75 1995.33 0.970 162.6 240.4 0.361 ZIRM 04242+1445 3.2215 0.731 116.1 108.1 2004.9726 239.1 0.379 - B 1937 71.71 1956.29 0.209 17.8 7.7 0.225 ZIRM 04302-1747 5.0202 0.212 134.2 136.7 1993.0923 4.6 0.219 3812 A 1031 513.48 1875.32 0.564 158.9 95.0 0.419 ZIRM 05153+4710 0.7011 0.857 69.8 133.0 2004.94 95.8 0.423 - WGT 1Ca-Cb 11.05 2002.87 0.534 25.3 237.8 0.020 DOCOBO 05353-0523 32.5792 0.040 100.7 290.9 2008.173 224.5 0.030 et al. (*) - MCA 32 124.73 1993.32 0.828 95.9 105.1 0.199 ZIRM 07336+1550 2.8862 0.351 83.7 270.0 2004.2035 105.6 0.199 6211 HU 842 AB 982. 1894.79 0.523 26.0 76.4 0.431 LING 07374+3852 0.3666 0.905 61.1 325.9 2003.9496 77.1 0.430 7139 STF1300 1131.83 2160.36 0.409 174.0 180.3 5.100 ZIRM 09013+1516 0.3181 6.066 114.9 80.4 2004.8845 180.1 5.093 - I 173 202.7 1932.09 0.667 15.3 6.3 0.946 SCARDIA 10062-4722 1.7760 0.600 41.9 180.5 1997.118 6.7 0.950 et al. (**) 7675 HO 44 256.04 1942.68 0.984 65.2 203.2 0.649 ZIRM 10120-0612 1.4060 0.433 143.6 52.7 2004.269 203.1 0.653 7685 STT 213 189.7 1939.39 0.965 53.1 122.3 1.039 SCARDIA 10131+2725 1.8977 0.980 122.8 105.1 2006.322 122.1 1.045 et al. (**) 7982 BU 1076 128.5 1902.11 0.753 44.4 55.0 1.104 SCARDIA 10557+0044 2.8016 1.115 105.2 112.4 2007.323 54.5 1.092 et al. (**) 7997 A 2375 152.5 1964.82 0.637 71.7 177.1 0.464 DOCOBO 10585+1711 2.3607 0.372 151.5 101.2 1997.34 176.1 0.468 & LING - B 1705AB 142.18 2002.73 0.363 53.6 355.4 0.129 ZIRM 11395-6524 2.5320 0.315 56.2 259.1 1993.0930 2.7 0.138 - FIN 380 84.90 1971.22 0.891 166.5 159.9 0.295 ZIRM 12572+0818 4.2403 0.219 83.2 138.8 2005.404 160.0 0.299 8791 STT 260 233.79 1994.72 0.846 32.3 65.0 0.257 ZIRM 13081+2657 1.5398 0.422 25.8 265.1 1997.43 66.9 0.269 - CHR 137 9.82 1991.16 0.592 20.6 6.5 0.089 DOCOBO & 14189+5452 36.6599 0.068 129.3 174.5 2007.4868 351.8 0.064 TAMAZIAN 9586 HJ 4756 541.60 1825.04 0.221 150.9 246.8 0.627 ZIRM 15197-2416 0.6647 1.196 117.1 127.2 1992.4573 245.7 0.627 9730 HU 1168 88.57 1984.44 0.599 127.8 297.9 0.485 DOCOBO 15370+6426 4.0646 0.376 122.7 47.7 1997.52 296.8 0.491 & LING 9909 STF1998AB-C 1514.43 2226.10 0.041 47.4 45.0 7.558 ZIRM 16044-1122 0.2377 7.755 131.5 59.3 2005.816 44.8 7.556 - HDS2273Aa 33.54 1993.02 0.422 163.0 22.7 0.453 ZIRM 16059+1041 10.7335 0.353 35.6 54.3 2006.5221 27.6 0.448 - COU1281 40.50 2010.62 0.215 26.1 191.7 0.184 DOCOBO & 16230+3803 8.8889 0.285 107.9 255.9 2007.5089 183.7 0.147 TAMAZIAN - B 1871 399.08 1973.84 0.732 279.6 295.1 0.239 ZIRM 17539-3445 0.9021 0.376 67.1 273.9 1991.5667 295.7 0.241 - COU 1037 39.00 2001.45 0.292 155.7 159.0 0.138 DOCOBO & 19559+2500 9.2308 0.157 99.0 245.8 2007.5091 157.4 0.151 TAMAZIAN - FIN 359 22.86 1988.97 0.416 35.3 21.7 0.071 DOCOBO 23529-0309 15.7480 0.076 138.5 126.9 2005.5241 6.9 0.058 & LING (*) DOCOBO, TAMAZIAN, KRAUS & WEIGELT (**) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== NOTE Please pay attention to the new e-mail addresses of the editors: J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) ****************************************************************************************** The deadline for contributions to Information Circular No. 167 is: February 15th 2009 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 167 (FEBRUARY 2009) NEW ORBITS ADS Name P (yr) T e W(2000) 2009 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2010 ------------------------------------------------------------------------------------------ MCA 16Aa,Ab 57.90 2037.96 0.357 4.1 30.9 0.342 CVETKOVIC 04422+2257 6.2180 0.284 130.7 142.2 2005.869 28.3 0.348 5322 CHR 168Aa,Ab 74.28 1996.06 0.716 52.6 255.0 0.100 CVETKOVIC 06410+0954 4.8468 0.096 51.2 69.2 2006.191 256.8 0.103 FIN 113AB 269.99 1977.65 0.631 104.6 80.7 0.150 CVETKOVIC 08144-4550 1.3334 0.440 80.1 173.0 2006.199 82.2 0.160 FIN 116 115.90 1994.18 0.519 61.1 237.2 0.215 CVETKOVIC 08275-5501 3.1062 0.250 123.7 79.7 2006.199 235.3 0.221 FIN 315Aa,Ab 196.49 2133.28 0.105 126.7 190.6 0.086 CVETKOVIC 08291-4756 1.8322 0.150 60.5 296.0 2006.194 193.3 0.085 7871 STT 224 214.33 2031.69 0.150 162.5 140.8 0.454 SCARDIA 10397+0851 1.6797 0.550 132.2 81.1 2007.288 139.1 0.448 et al. (*) 8128 STF1527 341.52 2010.19 0.889 178.2 170.7 0.283 SCARDIA 11190+1416 1.0541 2.300 62.2 26.9 2007.288 187.5 0.245 et al. (*) FIN 372 39.61 1993.44 0.314 29.3 9.1 0.113 CVETKOVIC 14567-6247 9.0881 0.091 150.6 224.6 2006.192 4.3 0.114 9547 HO 60 183.0 1973.28 0.543 34.0 68.4 0.163 DOCOBO 15136+3453 1.9672 0.281 109.3 164.2 2005.5179 66.9 0.170 & LING CHR 51 46.37 1992.93 0.957 103.4 248.0 0.290 DOCOBO & 15513-0305 7.7636 0.389 104.4 75.1 2007.509 246.9 0.289 TAMAZIAN CHR 55 76.32 1989.98 0.691 177.5 116.6 0.064 DOCOBO & 16254+3727 4.7170 0.357 96.6 292.5 2007.484 103.6 0.060 TAMAZIAN RST3950 26.55 2000.92 0.858 137.8 72.6 0.255 DOCOBO 16283-1613 13.5593 0.176 148.3 259.8 2005.5205 69.9 0.265 & LING CHR 90 70.62 2005.29 0.244 15.1 22.0 0.215 CVETKOVIC 19531-1436 5.0975 0.281 121.9 315.7 2006.194 17.6 0.222 16518 BU 180AB 537. 2201.93 0.198 1 61.8 135.2 0.535 LING 23072+6050 0.6704 0.517 133.4 180.4 2006.869 134.8 0.533 (*) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== PAPERS PUBLISHED IN 2008 1. ABT, H. A.: The Difference Between Metal-Poor and Metal-Rich Binaries. Astron. J. 135, 722 (2008). 2. ABT, H. A.: Visual Multiples. IX. MK Spectral Types. Astrophys. J. Sup. Ser. 176 (1), 216 (2008). 3. ABT, H. A.: Evidence That the Mean Radial Velocities of Many B0-B3 Stars Are Systematically Incorrect. Pub. Astron. Soc. of the Pacific 120 (869), 715 (2008). 4. AUGUSTEIJN, T. et al.: White dwarf-red dwarf binaries in the Sloan Digital Sky Survey. I. Sample definition. Astron. Astrophys. 486 (3), 843 (2008). 5. BAINES, E. K. et al.: The Search for Stellar Companions to Exoplanet Host Stars Using the CHARA Array. Astrophys. J. 682 (1), 577 (2008). 6. BALEGA, Y. Y. et al.: Atmospheric chemical abundances and the evolutionary status of the spectroscopic and speckle-interferometric binary 9 Cyg . Astron. Reports 52 (3), 226 (2008). 7. BENDER, C. F. & SIMON, M.: The Detection of Low-Mass Companions in Hyades Cluster Spectroscopic Binary Stars. Astrophys. J. 689 (1), 416 (2008). 8. BLAKE, C. H. et al.: A Spectroscopic Binary at the M/L Transition Astrop. J.Lett. 678, L125 (2008). 9. BOUY, H. et al.: Follow-up observations of binary ultra-cool dwarfs . Astron. Astrophys. 481 (3), 757 (2008). 10. CARQUILLAT, J.-M. & PRIEUR, J.-L. : Contribution to the study of F-G-K-M binaries: XII. Orbital elements of seven new spectroscopic binaries. Astron. Nach. 329 (1), 44 (2008). 11. CONNELLEY, M. S., REIPURTH, B., & TOKUNAGA, A. T. : The Evolution of the Multiplicity of Embedded Protostars. I. Sample Properties and Binary Detections. Astron. J. 135, 2496 (2008). 12. CONNELLEY, M. S., REIPURTH, B., & TOKUNAGA, A. T. : The Evolution of the Multiplicity of Embedded Protostars. II. Binary Separation Distribution and Analysis. Astron. J. 135, 2526 (2008). 13. COSTERO, R. et al.: The Escaping Spectroscopic Binary theta 1 Ori E. Rev. Mex. A. A. Conf. Ser. 34 102 (2008). 14. CVETKOVI 'C, Z.: First Orbits for Five Binaries. Astron. J. 136, 1746 (2008). 15. CVETKOVI 'C, Z. & NINKOVI 'C, S.: Orbits for two short-period and two long-period binaries. New Astron. 13 (8), 587 (2008). 16. CVETKOVI 'C, Z., NOVAKOVI 'C, B. & TODOROVI 'C, N.: Orbits of 11 visual binary stars. New Astron. 13 (3), 125 (2008). 17. DAHN, C. C. et al.: Trigonometric Parallaxes for Two Late-Type Subdwarfs: LSR 1425+71 (sdM8.0) and the Binary LSR 1610-00 (sd?M6pec). Astrophys. J. 686 (1), 548 (2008). 18. DAS, M. K. et al.: Effect of radiation on the stability of equilibrium points in the binary stellar systems: RW-Monocerotis, Kruger 60 Astrophys. J. Sup. Ser. 314, 261 (2008). 19. DAY-JONES, A. C. et al.: Discovery of a widely separated ultracool dwarf / white dwarf binary. Monthly Notices 388 (2), 838 (2008). 20. DOCOBO, J. A. et al.: A methodology for studying physical and dynamical properties of multiple stars. Application to the system of red dwarfs Gl 22. Astron. Astrophys. 478 (1), 187 (2008). 21. DOCOBO, J. 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JOERGENS, V.: Binary frequency of very young brown dwarfs at separations smaller than 3 AU. Astron. Astrophys. 492, (2), 545 (2008). 46. KARAMI, K., MOHEBI, R. & SOLTANZADEH, M. M.: Application of a new nonlinear least squares velocity curve analysis technique for spectroscopic binary stars. Astrophys. Space Science 318 (1-2), 69 (2008). 47. KAWKA, A. et al.: Orbital Parameters and Chemical Composition of Four White Dwarfs in PostCommon-Envelope Binaries. Astrophys. J. 675 (2), 1518 (2008). 48. KERVELLA, P. et al.: The radii of the nearby K5V and K7V stars 61 Cygni A & B - CHARA/FLUOR interferometry and CESAM2k modeling . Astron. Astrophys. 488 (2), 667 (2008). 49. KIMINKI, D. C., McSWAIN, M. V. & KOBULNICKY, H. A.: New Massive Binaries in the Cygnus OB2 Association. Astrophys. J. 679 (2), 1478 (2008). 50. KIYAEVA, O. V., KISELEV, A. A. & IZMAILOV, I. S.: Dynamical study of Wide Pairs of Stars based on Data from the WDS Catalog. Astron. Letters 34 (6), 405 (2008). 51. KOHLER, R. et al.: Orbits and masses in the T Tauri system. Astron. Astrophys. 482, (3), 929 (2008). 52. KOHLER, R. et al.: Multiplicity of young stars in and around R Coronae Australis. Astron. Astrophys. 488, (3), 997 (2008). 53. KOUWENHOVEN, M. B. N. & DE GRIJS, R: The effect of binaries on the dynamical mass determination of star clusters. Astron. Astrophys. 480, 103 (2008). 54. KOUWENHOVEN, M. B. N. et al.: Pairing mechanisms for binary stars . Astron. Nach. 329 (9-10), 984 (2008). 55. LAFRENI`ERE, D. et al.: A Multiplicity Census of Young Stars in Chamaeleon I. Astrophys. J. 683 (2), 844 (2008). 56. LAW, N. M., HODGKIN, S. T. & MACKAY, C. D.: The LuckyCam survey for very low mass binaries II. 13 new M4.5 - M6.0 binaries. Monthly Notices 384 (1), 150 (2008). 57. LEE, D.-W. et al.: Microlensing Detections of Planets in Binary Stellar Systems. Astrophys. J. 672, 623 (2008) 58. LIU, M. C., DUPUY, T. J. & IRELAND, M. J.: Keck Laser Guide Star Adaptive Optics Monitoring of 2MASS J15344984-2952274 AB: First Dynamical Mass Determination of a Binary T Dwarf. Astrophys. J. 689 (1), 436 (2008). 59. LUK'YANOV, L. G.: Dynamical evolution of stellar orbits in close binary systems with conservative mass transfer. Astron. Reports 52 (8), 680 (2008). 60. MACHIDA, M. N.: Binary Formation in Star-forming Clouds with Various Metallicities. Astrophys. J. Lett. 682 (1), L1 (2008). 61. MAKAROV, V. V., ZACHARIAS, N. & HENNESSY, G. S.: Common Proper Motion Companions to Nearby Stars: Ages and Evolution. Astrophys. J. 687 (1), 566 (2008). 62. MARINOVIC, A. A. B., GLEBBEEK, E. & POLS, R.: Orbital eccentricities of binary systems with a former AGB star . Astron. Astrophys. 480 (3), 797 (2008). 63. MASON, B. D., HARTKOPF, W. I. & WYCOFF, G. L.: Speckle Interferometry at the U.S. Naval Observatory. XIV. Astron. J. 136, 2223 (2008). 64. MASSAROTTI et al.: Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity . Astron. J. 135, 209 (2008). 65. MAXTED, P. F. et al.: A survey for low-mass spectroscopic binary stars in the young clusters around sigma Orionis and lambda Orionis. Monthly Notices 385 (4), 2210 (2008). 66. MEILLAND, A. et al.: delta Centauri: a new binary Be star detected by VLTI/AMBER spectro-interferometry. Astron. Astrophys. 488 (3), L67 (2008). 67. MERMILLIOD, J.-C., QUELOZ, D. & MAYOR, M.: Membership and binarity of solar-type dwarfs in the nearby open cluster Alpha Persei (Mel 20). Astron. Astrophys. 488 (1), 409 (2008). 68. MINTS, A. A.: Interaction of binary stars with clusters . Astron. Lett. 34 (1), 1 (2008). 69. MONI BIDIN, C., CATELAN, M. & ALTMANN, M.: Is a binary fraction-age relation responsible for the lack of EHB binaries in globular clusters?. Astron. Astrophys. 480 (1), L1 (2008). 70. MUTERSPAUGH, M. W. et al.: Masses, Luminosities, and Orbital Coplanarities of the mu Orionis Quadruple-Star System from Phases Differential Astrometry . Astron. J. 135, 766 (2008). 71. NAZ'E, Y. et al.: A binary signature in the non-thermal radio-emitter Cyg OB2 #9. Astron. Astrophys. 483 (2), 543 (2008). 72. NEUH "AUSER, R. et al.: Astrometric and photometric monitoring of GQ Lupi and its sub-stellar companion. Astron. Astrophys. 484 (1), 281 (2008). 73. PATIENCE, J. et al.: Optical Interferometric Observations of theta 1 Orionis C from NPOI and Implications for the System Orbit. Astrophys. J. Lett. 674 (2), L97 (2008). 74. PENNY, L. R., OUZTS, C & GIES, D. R.: Tomographic Separation of Composite Spectra. XI. The Physical Properties of the Massive Close Binary HD 100213 (TU Muscae). Astrophys. J. 681 (1), 554 (2008). 75. PICHARDO, B., SPARKE, L. S. & AGUILAR, L. A.: Geometrical and physical properties of circumbinary discs in eccentric stellar binaries. Monthly Notices 391 (2), 815 (2008). 76. PRIEUR, J.-L. et al.: Speckle observations with PISCO in Merate V. Astrometric measurements of visual binaries in 2006. Monthly Notices 387 (2), 772 (2008). 77. RADIGAN, J. et al.: Discovery of a Wide Substellar Companion to a Nearby LowMass Star. Astrophys. J. 689 (1), 471 (2008). 78. RAMM, D. J.: High-precision orbital parameters for the short-period spectroscopic binary HD 159656 an eccentric orbit confirmed for an old but active system. Monthly Notices 387 (1), 220 (2008). 79. REID, N. I. et al.: L-Dwarf Binaries in the 20-Parsec Sample . Astron. J. 135, 580 (2008). 80. RIAZ, B., GIZIS, J. E. & SAMADDAR, D.: Hubble Space Telescope Search for M Subdwarf Binaries. Astrophys. J. 672 (2), 1153 (2008). 81. RICA, F.: Orbital Elements for BU 1240 AB. Nature of the C and D Components. Rev. Mex. A. A. 44 (1), 137 (2008). 82. RUCINSKI, S. M. et al.: Radial Velocity Studies of Close Binary Stars. XIII . Astron. J. 136, 586 (2008). 83. 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A Faint Companion Search of O-Star Systems . Astron. J. 136, 554 (2008). 104. WILLIAMS, S. J. et al.: Dynamical Masses for the Large Magellanic Cloud Massive Binary System [L72] LH 54-425. A strophys. J. 682 (1), 492 (2008). 105. ZHAO, M. et al.: First Resolved Images of the Eclipsing and Interacting Binary beta Lyrae. Astrophys. J. Lett. 684 (2), L95 (2008). 106. ZHUCHKOV, R. Y. et al.: Physical and Dynamical Parameters of the Multiple System HD 222326 . Astron. Reports 52 (7), 546 (2008). ========================================================================================== ANNOUNCEMENTS ADDRESS CHANGE FOR COMMISSION 26 WEBSITE AND USNO DOUBLE STAR CATALOGS Under direction of its Chief of Naval Operations, all of the websites for the U.S. Navy Oceanography community were recently combined under a single web portal. As a result, the URLs for the Commission 26 website, as well as the WDS, Fourth Interferometric Catalog, Sixth Orbit Catalog, and all other USNO double star catalogs, have changed. All of these sites can now be reached from the URL: http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds There may be some further changes to locations of the catalog data files themselves, but the addresses of this page and the pages linked directly from it should remain correct. A considerable number of changes were made to these catalogs in rather short order, so we would appreciate notification of any broken links, as well as any erroneous or missing information the reader may run across. Suggestions for other improvements are also welcome. Brian D. Mason & William I. Hartkopf U.S. Naval Observatory ****************************************************************************************** The deadline for contributions to Information Circular No. 168 is: June 15th 2009 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 168 (JUNE 2009) NEW ORBITS ADS Name P (yr) T e W(2000) 2009 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2010 ------------------------------------------------------------------------------------------ - KUI 103 29.5 2006.48 0.600 283.6 347.6 0.407 GILI 21000+4004 12.2034 0.691 36.3 329.6 2008.664 7.0 0.479 - RST 33 215.5 1951.21 0.901 154.7 300.4 1.110 DOCOBO 01259-4754 1.6704 1.154 112.5 71.8 2001.8648 300.1 1.113 & LING - I 65 16.77 2009.20 0.444 122.9 352.3 0.103 DOCOBO 06573-3530 21.4669 0.207 33.8 246.9 2006.1936 60.4 0.109 & LING 7744 STT 216 314.93 1941.24 0.544 53.3 234.6 2.136 SCARDIA 10227+1521 1.1431 1.840 144.6 42.1 2009.330 234.0 2.153 et al. (*) - COU 100 78.21 2009.42 0.815 25.5 193.6 0.061 DOCOBO & 14459+2344 4.6030 0.420 102.7 255.0 2007.487 49.2 0.043 TAMAZIAN 13961 SEE 512 82.18 1996.66 0.031 125.8 137.2 0.184 DOCOBO & 20325-1637 4.3806 0.290 99.5 252.2 2007.509 135.6 0.200 TAMAZIAN 15971 STF2909 486.70 1982.73 0.343 133.2 172.8 2.113 SCARDIA 22288-0001 0.7397 3.380 141.7 273.0 2008.734 171.4 2.135 et al. (*) 16648 HU 497BC 180.6 2032.45 0.313 62.4 74.9 0.230 LING 23175+1652 1.9934 0.292 117.1 54.2 2005.8655 73.5 0.231 (*) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== NEW DOUBLE STAR Discovered by: R. Gili with Interferometry and Lucky imaging at the 76 cm refractor at Nice Observatory. (This star is Bb component of COU 555 AB) STAR Mgn Coord. 2000 Epoch theta rho nights GII 2Bb 13.4 - 13.8 0255390 + 302803 2008.066 155.1 0.454 Interferometry 2008.066 154.7 0.43 Lucky imaging ========================================================================================== ANNOUNCEMENT NEW INSTRUMENTATION FOR THE INVESTIGATION OF BINARY STARS AT THE R. M. ALLER OBSERVATORY *) The EMCCD speckle camera The PhotonMAX EMCCD based speckle camera optimizes very high quantum efficiency along with extremely low read noise. It delivers a very high signal-to-noise ratio through the camera's back-illuminated EMCCD with > 90% quantum efficiency and an on-chip multiplication gain. This effectively reduces read noise to well below 1 e- rms. As a result, the PhotonMAX achieves single photon sensitivity, and single photoelectron events are recorded with a signal-to-noise ratio of about 50. **) The mid-resolution spectrograph ALTAIR This mid-resolution spectrograph in combination with the FLI PL09000 3055x3055 pix CCD detector is designed for detailed studies of stellar spectra with moderate spectral resolution. It can be attached to telescopes of up to 1.5 m aperture. Its 600 grooves/mm grating provides lineal dispersion of 102A/mm and resolution power of R=1000 in the spectral range of 3800-7500A. The 0.6x15mm slit provides high quality spectra for medium brightness stars of 8-12 mag with our Observatory's 0.62m telescope. These spectra can also be used to measure stellar radial velocities with an accuracy of up to 3-4 km/sec which, in some cases, is enough to suspect the presence of a third body in binary systems. Jose-Angel Docobo Director R. M. Aller Observatory ========================================================================================== NOTE Dr. Paul Couteau, Honorary Astronomer of the Observatoire de la C^ote d'Azur (Nice site) and past President of the IAU Commission 26 (1967- 1970), was named as Knight of the French Legion of Honor. This is a French order established by Napoleon Bonaparte in 1802 and is the highest decoration in France. The distinction was handed over to Dr. Couteau by Jean-Claude Pecker, member of the French Science Academy. The ceremony was held at the Nice Observatory on June 11, 2009. The Editors ****************************************************************************************** The deadline for contributions to Information Circular No. 169 is: October 15th 2009 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 169 (OCTOBER 2009) NEW ORBITS ADS Name P (yr) T e W(2000) 2009 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2010 ------------------------------------------------------------------------------------------ 829 MAD 1 925. 2127.14 0.389 5.2 1.6 0.784 LING 01006+4719 0.3892 0.930 136.4 94.2 2007.090 1.2 0.781 SLR 1AB 168.0 2003.50 0.716 128.3 117.4 0.390 ALZNER 01061-4643 2.1429 0.938 145.6 296.3 2008.74 110.8 0.420 et al. (*) 2257 STF 333AB 1215.91 704.11 0.317 25.6 209.3 1.374 RICA 02592+2120 0.2961 2.174 84.2 162.1 2007.839 209.4 1.369 - COU1136 250.0 2009.50 0.835 76.9 53.9 0.049 DOCOBO & 14588+3551 1.4400 0.431 109.8 65.9 2007.5060 13.7 0.027 TAMAZIAN - SEE 264A,Ba 145.9 1977.57 0.121 153.7 21.9 0.747 DOCOBO 16057-3252 2.4683 0.869 142.7 34.0 2009.263 19.3 0.758 & LING - COO 197 1132. 1909.8 0.549 9.3 96.7 2.248 ALZNER & 16253-4909 0.3180 3.37 159.6 180.5 2008.42 96.2 2.260 ARGYLE - R 283 652. 1966.16 0.645 72.6 248.4 0.769 ALZNER & 16425-3705 0.5522 1.26 122.4 93.4 2008.41 247.8 0.778 ARGYLE 10459 BU 628 699.23 1807.23 0.371 27.3 267.2 0.533 RICA 17184+3240 0.5149 0.885 116.8 325.8 2009.4404 266.6 0.536 - SEE 342 700. 2059. 0.180 4.6 209.2 0.410 ALZNER & 17534-3454 0.5143 0.52 137.1 184.8 2008.41 208.6 0.411 ARGYLE I - SEE 342 1400. 1975.2 0.225 161.3 209.8 0.436 ALZNER & 17534-3454 0.2571 0.850 123.3 281.8 2008.41 209.3 0.438 ARGYLE II - COU 206 202.0 2002.00 0.773 137.3 279.5 0.048 DOCOBO & 18363+2143 1.7822 0.168 119.2 143.4 2007.5063 272.9 0.049 TAMAZIAN - CHR 94Aa,Ab 25.33 2009.56 0.400 97.5 18.8 0.022 CVETKOVIC 20158+2749 14.2150 0.111 71.5 293.8 2006.5587 76.4 0.046 - HDS2995 68.60 2007.52 0.671 138.7 113.8 0.133 CVETKOVIC 21014+4037 5.2478 0.388 131.8 346.5 2006.520 92.2 0.136 15971 STF2909Bb-P 25.82 2003.40 0.125 20.9 81.7 0.058 SCARDIA 22288-0001 13.9416 0.062 22.3 330.3 2008.734 96.2 0.059 et al. (**) (*) ALZNER, ARGYLE & ANTON (**) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== ANNOUNCEMENTS NEW BOOK Jean-Claude Thorel, from the Cote d'Azur Observatory, announces the publication of his book: Le ciel d'une Vie. It is a biography of the French astronomer, Robert Jonckheere (1888-1974), the discoverer of 3,350 double stars. The preface was written by Paul Couteau. The book was published by JMG 'Editions Le Temps Pr'esent- collection: Science, jmg-editions@wanadoo.fr (340 pages, 100 photos, 18 euros). Jean-Claude Thorel Cote d'Azur Observatory FORTHCOMING MEETING Within the frame of the International Year of the Astronomy, we will hold an international workshop from December 10-11, 2009 in Santiago de Compostela, Spain. The Workshop is devoted to binaries, "Double and Multiple Stars: Dynamics, Physics, and Instrumentation". More information is available at the web address: http://www.usc.es/astro/ds/ds.html J.A. Docobo R.M. Aller Observatory *********************************************************************** The deadline for contributions to Information Circular No. 170 is: February 15th 2010 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 170 (FEBRUARY 2010) NEW ORBITS ADS Name P (yr) T e W(2000) 2010 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2011 ---------------------------------------------------------------------------------------- 111 BU 391AB 616.04 2095.68 0.103 81.75 259.0 1.352 ZIRM 00094-2759 0.5925 1.500 98.98 256.86 2006.940 258.9 1.346 - SEE 3 406.00 1978.45 0.850 267.70 117.0 0.801 HARTKOPF 00098-3347 0.8871 1.119 41.7 77.6 2008.5490 117.7 0.814 & MASON - HDS 33 29.03 2018.12 0.378 177.0 132.0 0.189 CVETKOVIC 00143-2732 12.4010 0.251 59.8 73.9 2008.5432 141.6 0.199 - B 1024 1466. 1926.38 0.814 126.0 73.1 0.410 LING 00149-3209 0.2456 1.586 110.4 311.8 2008.5431 72.3 0.410 238 A 1803AB 35.66 1950.70 0.002 124.10 306.0 0.179 HARTKOPF 00174+0853 10.0950 0.189 95.4 282.0 2008.7670 305.0 0.187 & MASON 281 BU 1015 137.00 1961.65 0.557 291.20 103.8 0.483 HARTKOPF 00206+1219 2.6283 0.333 35.0 10.0 2008.8879 104.7 0.487 & MASON - HDS 56 28.05 1999.30 0.481 96.1 294.0 0.326 CVETKOVIC 00251+4803 12.8323 0.230 164.0 358.9 2007.8257 288.7 0.334 - B 1909 11.35 1995.09 0.005 119.49 311.9 0.175 HARTKOPF 00284-2020 31.7093 0.202 69.8 99.0 2009.6710 334.8 0.109 & MASON 475 D 2AB 2981.00 2007.00 0.923 266.00 42.8 0.067 HARTKOPF 00345-0433 0.1208 2.740 77.5 80.2 2009.7560 55.4 0.090 & MASON 520 BU 395 25.02 1998.78 0.218 291.98 96.7 0.496 HARTKOPF 00373-2446 14.3905 0.675 78.6 318.1 2009.7560 101.0 0.596 & MASON - I 440 196.00 2142.00 0.650 57.00 269.3 0.402 HARTKOPF 00427-6537 1.8350 0.274 157.0 344.0 2009.6710 268.7 0.405 & MASON 822 A 1903AB 143.40 1957.00 0.225 145.00 15.0 0.400 HARTKOPF 00596-0111 2.5107 0.354 20.4 84.0 2008.7729 16.8 0.401 & MASON - HDS 144AB 40.04 2021.53 0.186 127.3 176.0 0.236 CVETKOVIC 01071-0036 8.9916 0.274 135.4 64.9 2008.7673 167.8 0.242 - HU 1342 79.10 1967.70 0.457 153.10 328.6 0.373 HARTKOPF 01094-5636 4.5536 0.260 118.1 4.0 2009.6710 327.6 0.370 & MASON - FIN 337BC 27.03 1995.04 0.215 194.00 38.4 0.131 MASON & 01198-0031 13.3195 0.109 16.8 13.0 2009.6710 47.3 0.128 HARTKOPF - DON 17 1512.00 1949.90 0.947 148.00 287.7 1.282 HARTKOPF 01262-6751 0.2381 2.536 37.0 344.0 2008.7700 288.0 1.297 & MASON 1232 A 314 107.90 1989.31 0.671 193.00 9.8 0.349 HARTKOPF 01343-0827 3.3353 0.296 116.1 44.1 2008.7729 9.1 0.357 & MASON - BU 1000AB-C 123.50 1956.74 0.226 141.30 347.8 1.745 HARTKOPF 01350-2955 2.9152 1.510 35.2 47.5 2008.7670 349.5 1.740 & MASON 1360 BU 509 241.20 1983.48 0.292 221.04 49.8 0.713 HARTKOPF 01437+0934 1.4923 0.900 118.0 94.0 2008.7729 48.8 0.726 & MASON - I 265 775.00 1977.26 0.744 222.60 225.0 0.578 HARTKOPF 02009-4350 0.4647 1.209 68.9 271.2 2008.6060 225.4 0.587 & MASON - HJ 3494 475.00 1918.20 0.494 80.30 245.1 2.225 HARTKOPF 02198-3527 0.7583 2.119 146.2 72.0 2008.7729 244.6 2.236 & MASON 2236 A 2413 124.40 1930.27 0.449 185.10 158.1 0.538 HARTKOPF 02572+0153 2.8940 0.632 70.1 101.3 2008.8879 159.3 0.547 & MASON 2283 A 2611 74.40 1950.00 0.510 220.00 44.4 0.172 HARTKOPF 03003-1118 4.8394 0.160 46.4 314.0 2008.7679 47.0 0.165 & MASON 2911 HU 27 276.00 2083.00 0.673 184.10 328.9 0.401 HARTKOPF 03590+0947 1.3021 0.809 77.7 261.6 2008.8879 329.8 0.406 & MASON - CHR 14 40.90 1992.97 0.853 155.90 15.1 0.265 MASON & 04119+2338 8.8020 0.310 71.4 73.3 2008.7732 17.2 0.258 HARTKOPF - HDS 552 32.7 1994.23 0.653 128.4 348.7 0.114 CVETKOVIC 04195+3800 10.9794 0.183 104.6 288.8 2008.0688 343.7 0.125 3151 A 1835 128.76 1958.36 0.532 76.8 18.1 0.200 ZIRM 04216+0658 2.7959 0.220 56.6 121.7 1996.8687 19.6 0.203 3191 BU 1235 218.31 1973.93 0.123 57.1 256.3 0.097 ZIRM 04245+2244 1.6490 0.424 85.3 184.3 1996.8712 259.2 0.086 - WOR 15 40.74 1995.54 0.793 140.2 1.9 0.471 ZIRM 04268+1240 8.8365 0.349 131.6 316.9 2007.8260 0.0 0.487 3241 I 413 142.40 1968.60 0.750 95.90 323.1 0.675 HARTKOPF 04275-2427 2.5279 0.484 31.7 69.7 2008.7729 323.8 0.680 & MASON - B 2092AB 12.11 1986.90 0.777 304.90 220.8 0.101 HARTKOPF 04340-5503 29.7352 0.201 46.0 40.0 2008.7729 3.9 0.035 & MASON 3326 A 1840AB 247.00 1996.20 0.404 118.20 13.4 0.146 HARTKOPF 04362+0814 1.4600 0.267 145.3 53.8 2008.7700 9.8 0.149 & MASON 3329 STT 86 828.23 2094.65 0.228 139.4 0.4 0.472 ZIRM 04366+1946 0.4347 0.612 146.3 190.4 2008.8498 359.8 0.472 3614 HU 445 166.20 1892.00 0.037 290.90 136.5 0.389 HARTKOPF 05017+2050 2.1665 0.419 45.0 323.0 2008.8500 138.3 0.385 & MASON 3728 A 2636 390.00 1947.50 0.841 120.00 348.8 0.349 HARTKOPF 05089+0313 0.9225 0.350 42.0 82.0 2008.7729 349.2 0.351 & MASON - I 275 729.09 2002.31 0.530 40.0 222.5 0.803 ZIRM 05234-3640 0.4938 1.705 130.1 161.2 2008.7703 221.4 0.806 - I 345 123.2 1995.50 0.692 30.5 213.2 0.257 ARGYLE 05248-5219 2.9221 0.287 124.8 47.8 2008.773 211.8 0.269 & ALZNER - SEE 53 81.94 1992.59 0.413 288.00 86.3 0.201 HARTKOPF 05276-2055 4.3937 0.188 11.8 35.0 2008.7700 89.7 0.207 & MASON - RST 141 134.00 1966.50 0.746 64.00 264.3 0.532 HARTKOPF 05352-4657 2.6817 0.357 47.5 43.0 2008.7729 264.8 0.534 & MASON 4279 BU 1052 191.90 2005.60 0.126 186.40 185.7 0.602 HARTKOPF 05417-0254 1.8760 0.689 99.3 353.9 2009.2650 185.3 0.600 & MASON - HDS 787 12.10 2000.43 0.179 149.80 338.1 0.112 MASON & 05525-0217 29.7521 0.116 54.0 289.8 2009.2650 2.1 0.083 HARTKOPF - HU 1570 221.50 1955.83 0.748 155.00 345.1 0.947 HARTKOPF 05580-5212 1.6252 0.672 22.9 34.0 2008.7729 345.6 0.955 & MASON - R 65AB 53.13 1969.44 0.977 140.00 260.2 0.584 HARTKOPF 06298-5014 6.7764 0.630 121.5 67.1 2008.7700 259.3 0.559 & MASON - HDS 930 13.16 1999.12 0.282 123.9 285.5 0.072 CVETKOVIC 06426+3955 27.3530 0.077 150.0 295.8 2007.8207 252.2 0.057 6526 A 1580 399.00 1965.00 0.290 117.00 291.1 0.290 HARTKOPF 08017-0836 0.9014 0.351 38.0 104.0 2009.2600 292.1 0.292 & MASON - CHR 143Aa,Ab 25.90 1987.68 0.610 167.30 334.8 0.057 MASON & 08125-4616 13.8996 0.082 76.9 259.0 2009.2625 340.0 0.056 HARTKOPF 6871 BU 205AB 142.90 1954.38 0.290 177.70 294.0 0.586 HARTKOPF 08331-2436 2.5186 0.526 150.8 90.1 2009.2620 292.3 0.587 & MASON - RST3603 97.70 1964.60 0.383 146.00 327.6 0.367 HARTKOPF 08431-1225 3.6861 0.266 157.0 5.0 2009.2600 326.0 0.367 & MASON 6989 HU 120 197.60 1983.19 0.375 140.20 315.6 0.410 HARTKOPF 08462-1422 1.8222 0.475 45.6 82.5 2009.2600 317.2 0.417 & MASON 7021 BU 1068AB 416.00 1964.40 0.608 151.70 322.7 0.360 HARTKOPF 08495+0852 0.8648 0.448 128.1 82.1 2009.2600 322.1 0.363 & MASON 7077 A 1754 452.00 1975.10 0.510 115.80 123.9 0.352 HARTKOPF 08542-0229 0.7973 0.530 46.0 292.0 2009.2600 124.9 0.355 & MASON - FIN 348 40.00 1984.38 0.548 222.10 272.7 0.169 MASON & 09243-3926 9.0000 0.127 149.7 107.0 2009.2625 268.9 0.167 HARTKOPF 7384 HO 366AB 353.11 2001.30 0.764 9.8 250.9 0.136 ZIRM 09279+3128 1.0195 0.404 19.4 166.1 1997.1315 256.1 0.144 7706 I 851 117.00 1953.90 0.782 63.00 236.2 0.381 HARTKOPF 10163-2859 3.0775 0.216 136.0 11.0 2009.2629 235.7 0.381 & MASON 7871 STT 224AB 225.30 2053.10 0.086 153.50 141.6 0.512 HARTKOPF 10397+0851 1.5981 0.534 137.8 94.3 2009.2650 140.3 0.509 & MASON 7896 A 2768 81.30 1976.71 0.549 59.70 250.1 0.591 HARTKOPF 10426+0335 4.4306 0.394 142.5 358.4 2009.2650 248.8 0.596 & MASON 7982 BU 1076 137.50 1921.20 0.710 219.20 53.8 1.139 HARTKOPF 10557+0044 2.6188 0.754 125.1 322.3 2009.2650 53.4 1.136 & MASON 8096 BU 916 1386.46 1991.78 0.787 143.7 179.6 0.267 ZIRM 11141-1526 0.0003 1.177 45.2 350.2 2004.2010 181.8 0.268 8138 STN 22 714.60 2063.90 0.630 175.5 351.5 3.896 ZIRM 11214-2027 0.5038 5.896 47.4 272.1 1998.37 352.1 3.857 8145 A 2776AB 97.00 1998.00 0.942 192.00 55.2 0.155 HARTKOPF 11230+0408 3.7210 0.190 53.6 75.0 2009.2600 56.3 0.161 & MASON - I 883 154.30 1976.81 0.640 129.80 227.4 0.226 HARTKOPF 11268-5310 2.3326 0.224 35.3 311.7 2009.2600 228.8 0.230 & MASON - RST4944 447.00 2011.00 0.535 287.00 240.9 0.146 HARTKOPF 11279-0142 0.8058 0.405 131.0 61.0 2009.2600 237.3 0.142 & MASON 8332 A 2579 145.30 1902.11 0.703 190.80 39.4 0.402 HARTKOPF 11532-1540 2.4772 0.403 115.6 284.2 2009.2660 38.6 0.402 & MASON 8481 BU 920 873.04 1764.26 0.166 142.2 306.1 1.857 RICA 12158-2321 0.4124 2.012 63.5 28.0 2009.2599 306.3 1.864 - DAW 63 56.89 1964.10 0.289 199.00 93.2 0.335 HARTKOPF 12396-3717 6.3276 0.368 22.6 359.0 2009.2629 100.3 0.323 & MASON 8757 BU 341 58.98 1964.10 0.988 136.2 131.6 0.583 ZIRM 13038-2035 6.1038 0.718 92.8 234.5 2009.2600 131.5 0.556 - FIN 297AB 61.30 1969.60 0.687 180.00 0.1 0.238 MASON & 13145-2417 5.8728 0.152 20.0 345.0 2008.5394 1.7 0.234 HARTKOPF - COU 401 98.70 2007.42 0.700 165.4 331.8 0.109 DOCOBO & 13482+2248 3.6474 0.401 76.8 70.9 2007.4868 337.5 0.154 TAMAZIAN - RST3852 95.00 1985.80 0.278 150.60 348.3 0.228 HARTKOPF 13539-1440 3.7887 0.225 128.9 31.2 2009.2660 346.2 0.234 & MASON - FIN 370 18.57 2006.54 0.201 284.00 159.4 0.120 MASON & 13574-6229 19.3861 0.137 152.2 32.0 2009.2627 140.0 0.134 HARTKOPF 9073 A 2167 109.40 1924.80 0.612 246.90 100.3 0.201 HARTKOPF 13583+0213 3.2896 0.228 119.5 270.3 2009.2600 98.6 0.201 & MASON - FIN 309 12.93 1995.25 0.643 281.90 90.6 0.176 MASON & 14462-2111 27.8444 0.181 25.9 39.5 2009.2628 106.3 0.226 HARTKOPF 9443 A 2172 168.30 2000.40 0.177 128.50 130.3 0.164 HARTKOPF 14565+0255 2.1391 0.196 115.0 326.0 2009.2629 129.1 0.165 & MASON - FIN 372 39.62 1993.81 0.304 228.00 1.3 0.103 MASON & 14567-6247 9.0863 0.086 153.3 68.6 2009.2603 355.9 0.103 HARTKOPF - HJ 4757 258.00 2075.00 0.931 116.00 1.7 0.823 HARTKOPF 15234-5919 1.3933 2.576 100.4 264.9 2009.2600 0.8 0.823 & MASON - COU 798 154.7 1983.37 0.357 46.1 199.4 0.171 DOCOBO & 15347+2655 2.3271 0.259 66.7 24.7 2007.5061 201.3 0.179 TAMAZIAN - CHR 51 50.60 2002.78 0.832 74.00 246.4 0.328 MASON & 15513-0305 7.1146 0.400 98.1 72.8 2009.2657 245.6 0.337 HARTKOPF - MCA 42CE 39.00 2034.20 0.029 184.00 320.2 0.116 MASON & 16054-1948 9.2308 0.133 41.1 350.0 2009.2629 328.8 0.122 HARTKOPF 10017 HU 481 119.50 1997.95 0.567 172.60 271.5 0.300 HARTKOPF 16212+2259 3.0130 0.464 146.8 160.5 2009.2629 266.7 0.313 & MASON 10095 A 693 96.40 1991.55 0.273 221.70 138.3 0.121 HARTKOPF 16318-0216 3.7351 0.196 129.2 345.4 2009.2629 132.4 0.122 & MASON - FIN 355 14.22 1985.98 0.491 190.41 197.4 0.326 MASON & 17156-3836 25.3254 0.253 115.2 135.2 2009.2606 191.3 0.300 HARTKOPF - COU 315 90.50 2012.83 0.975 103.4 127.8 0.103 DOCOBO & 17161+2316 3.9779 0.506 100.4 89.3 2007.4927 123.5 0.090 TAMAZIAN - HDO 275 98.60 1986.76 0.319 266.30 87.2 0.673 HARTKOPF 17443-7213 3.6505 0.629 150.1 58.6 2009.2629 84.7 0.684 & MASON 10858 STF3128AB 409.00 1947.60 0.942 214.00 50.7 1.214 HARTKOPF 17530-0755 0.8807 0.965 153.0 356.0 2009.2660 50.5 1.225 & MASON - RST5099 43.40 1965.80 0.499 122.40 275.5 0.098 HARTKOPF 18044-5953 8.2895 0.269 65.5 106.4 2009.2629 291.1 0.139 & MASON 11260 HU 197 135.40 1930.80 0.057 238.02 67.0 0.500 HARTKOPF 18197+1016 2.6588 0.487 125.7 317.5 2009.2660 65.5 0.503 & MASON 11468 A 1377AB 228.1 1918.53 0.437 55.2 124.5 0.253 SCARDIA 18339+5221 1.5783 0.268 49.3 272.0 2008.711 125.6 0.253 et al. (*) 11640 FIN 332Aa,Ab 27.03 1994.20 0.790 136.2 312.0 0.160 MASON & 18455+0530 13.3185 0.094 106.0 10.0 2009.2634 311.2 0.155 HARTKOPF 11640 FIN 332Ba,Bb 38.60 1967.90 0.867 111.8 6.8 0.043 MASON & 18455+0530 9.3264 0.105 117.2 311.2 2009.2634 356.6 0.053 HARTKOPF - MCA 53 33.65 1989.71 0.333 174.30 71.3 0.040 MASON & 18465-0058 10.6984 0.219 97.9 251.7 2009.2634 38.7 0.054 HARTKOPF - HEI 568 205.16 2014.60 0.230 94.5 268.8 0.307 ZIRM 19070+1104 1.7547 0.399 134.3 201.4 2008.5373 266.7 0.305 12803 STF2574 685.13 2057.26 0.670 107.6 92.9 0.507 ZIRM 19406+6240 0.5254 1.302 78.9 48.2 1999.7420 93.4 0.511 - CHR 88 20.31 1996.06 0.047 202.00 335.9 0.083 MASON & 19407-0037 17.7253 0.085 158.3 346.0 2009.2661 318.2 0.081 HARTKOPF 13048 B 454 101.50 1960.60 0.120 159.93 321.8 0.085 HARTKOPF 19531-2528 3.5467 0.316 85.6 286.9 2009.2629 325.0 0.101 & MASON 13493 BU 1205 139.90 1983.50 0.384 231.24 33.9 0.279 HARTKOPF 20123-0806 2.5728 0.486 78.3 10.4 2008.5430 35.3 0.299 & MASON 13717 BAR 12Ba,Bb 538.62 2073.19 0.070 96.6 63.2 0.541 ZIRM 20210-1447 0.6684 0.943 112.6 107.7 2008.7724 62.4 0.534 13850 A 730 88.44 1932.47 0.818 56.6 283.4 0.150 SCARDIA 20251+5936 4.0724 0.197 129.6 266.5 2008.802 280.7 0.145 et al. (*) (I) 13850 A 730 163.0 2037.06 0.066 150.1 98.8 0.125 SCARDIA 20251+5936 2.2086 0.224 118.7 135.5 2008.802 95.3 0.121 et al. (*) (II) - FIN 336 55.00 1967.60 0.672 150.80 127.6 0.152 MASON & 20311-1503 6.5455 0.158 66.2 102.4 2009.6705 129.7 0.152 HARTKOPF - B 997 64.20 1953.70 0.188 275.00 182.7 0.130 HARTKOPF 20507-3116 5.6083 0.195 41.4 330.0 2008.7729 192.2 0.128 & MASON 14492 HU 83 174.00 2055.00 0.210 101.50 86.3 0.254 HARTKOPF 20591-1313 2.0729 0.251 47.0 93.6 2008.7670 87.7 0.254 & MASON - BU 766AB 464.66 2042.14 0.201 113.8 183.3 0.272 ZIRM 21244-4100 0.7748 0.836 111.8 315.3 1999.7811 180.7 0.276 14954 BU 164AB 361.54 2023.74 0.875 79.3 131.7 0.085 ZIRM 21251+0923 0.9957 0.555 104.5 47.7 2008.7723 126.6 0.086 - B 1007 119.10 1971.70 0.237 197.40 323.2 0.128 HARTKOPF 21273-3218 3.0224 0.158 50.8 337.6 2008.7670 326.0 0.131 & MASON - HDS3053 20.30 1994.70 0.370 154.00 161.3 0.187 MASON & 21274-0701 17.7340 0.171 54.5 140.0 2009.6707 170.6 0.160 HARTKOPF 16057 STF2924 218.8 1971.59 0.272 81.2 200.7 0.175 SCARDIA 22330+6955 1.6453 0.759 77.7 2.5 2008.939 206.7 0.188 et al. (*) 16130 A 2695 124.00 2022.70 0.660 283.40 255.8 0.094 HARTKOPF 22384-0754 2.9023 0.255 76.6 50.9 2009.6710 259.3 0.099 & MASON 16157 A 2099 256.00 1917.90 0.454 348.30 163.6 0.779 HARTKOPF 22400+0113 1.4065 0.604 76.9 2.0 2008.8879 163.8 0.785 & MASON 16165 HU 494 550.00 1942.00 0.823 99.00 331.6 0.465 HARTKOPF 22406+0632 0.6545 0.500 29.0 90.0 2008.7700 332.0 0.469 & MASON 16242 BU 711 800. 1843.48 0.629 144.2 351.0 2.553 DOCOBO 22455+1112 0.4500 2.321 135.2 2.2 2005.688 350.7 2.564 & LING - HDO 301 26.50 1962.46 0.534 194.70 66.8 0.202 HARTKOPF 22500-3248 13.5865 0.199 148.9 257.0 2008.7700 56.5 0.186 & MASON - MCA 73 18.71 1991.52 0.061 110.30 24.3 0.029 MASON & 22535-1137 19.2410 0.079 66.9 277.0 2008.7670 68.0 0.040 HARTKOPF - RST3320 108.40 2001.94 0.463 156.00 133.1 0.189 HARTKOPF 23099-2227 3.3217 0.282 162.4 314.0 2009.6710 127.1 0.197 & MASON 16576 HU 197AB 170.26 1843.59 0.456 120.4 266.6 0.536 RICA 23114+3813 2.1144 0.419 106.7 249.6 2009.736 266.0 0.540 - HEI 88 35.46 2003.12 0.658 135.7 168.2 0.196 CVETKOVIC 23209+1643 10.1511 0.173 28.1 253.6 2007.8200 173.1 0.209 - FIN 359 22.81 1988.72 0.422 209.50 340.0 0.044 MASON & 23529-0309 15.7826 0.083 133.7 298.3 2009.6708 291.0 0.034 HARTKOPF (*) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== PAPERS PUBLISHED IN 2009 1. ABT, H. A.: Evidence that Most Binaries Do not Evolve after the Primaries Reach the Main Sequence. Pub. Astron. Soc. of the Pacific 121, 248 (2009). 2. ABT, H. A.: Stellar Rotation versus Duplicity in Open Cluster Early-Type Stars. Pub. Astron. Soc. of the Pacific 121 (886), 1307 (2009). 3. ABT, H. A.: MK Classifications of Spectroscopic Binaries. Astrophys. J. Sup. Ser. 180 (1), 117 (2009). 4. ABT, H. A.: Why are There Normal Slow Rotators Among A-Type Stars? Astron. J. 138 (1), 28 (2009). 5. BALEGA, Y. Y.; LEUSHIN, V. V. & KUZNETSOV, M. K.: Evolutionary status and chemical composition of the atmosphere of the spectroscopic and speckle interferometric binary HD 10009. Astrophys. Bull. 64 (3), 229 (2009). 6. BURKE, D. et al.: An Improved Technique for the Photometry and Astrometry of Faint Companions. Pub. Astron. Soc. of the Pacific 121, 767 (2009). 7. CONNELLEY, M. S., REIPURTH, B. & TOKUNAGA, A. T.: An Adaptive Optics Survey For Close Protostellar Binaries. Astron. J. 138, 1193 (2009). 8. CSIZMADIA, Sz. et al.: Interferometric Observations of the Hierarchical Triple System Algol. Astrophys. J. 705, 436 (2009). 9. CVETKOVIC, Z.; VINCE, I. & NINKOVIC, S.: Orbit of Binary 15 Monocerotis. Pub Aston. Obs. Belgrade. 86 331 (2009). 10. DAVIDSON J. W. et al.: A Photometric Analysis of Seventeen Binary Stars Using Speckle Imaging. Astron. J. 138, 1354 (2009). 11. DOCOBO, J. A. & LING, J. F.: Binary Stars with Components of Solar Type: 25 Orbits and System Masses. Astron. J. 138, 1159 (2009). 12. DUPUY, T. J.; LIU, M. C. & IRELAND, M. J.: Dynamical Mass of the Substellar Benchmark Binary HD 130948BC. Astrophys. J. 692, 729 (2009). 13. EVANS, N. R., MASSA, D. & PROFFITT, C.: Massive Star Multiplicity: The Cepheid W Sgr. Astron. J. 137, 3700 (2009). 14. FEKEL, F. C. & WILLMARTH, D. W.: The Spectroscopic Orbit of SAO 167450, Visual Companion of AA Ceti. Pub. Astron. Soc. of the Pacific 121 (886), 1359 (2009). 15. FEKEL, F. C., TOMKIN, J. & WILLAMSON, M. H.: New Precision Orbits of Bright Double-Lined Spectroscopic Binaries. III. HD 82191, ! Draconis, and 108 Herculis. Astron. J. 137, (4), 3900 (2009). 16. FEKEL, F. C. et al: HR 8257: A Three-Dimensional Orbit and Basic Properties. Astrophys. J. 695, 1527 (2009). 17. FRANKOWSKI, A., et al.: Spectroscopic binaries among Hipparcos M giants. II. Binary frequency. Astron. Astrophys. 498 (2), 479 (2009). 18. FAMAEY, B, et al.: Spectroscopic binaries among Hipparcos M giants. I. Data, orbits, and intrinsic variations. Astron. Astrophys. 498 (2), 627 (2009). 19. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities Paper 204: HR 738, HR 831, HR 5692, and HR 7252. The Observatory 129, 6 (2009). 20. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities Paper 205: HD 9519, delta Aurigae, HR 4427, and HR 7795. The Observatory 129, 54 (2009). 21. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities Paper 206: HD 103684, HD 107496, HD 111628, and HD 116479. The Observatory 129,127 (2009). 22. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities Paper 207: 58 Piscium, 31 Vulpeculae, and 70 Pegasi. The Observatory 129, 198 (2009). 23. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities Paper 208: HD 3065, HD 40602, HD 134738, and HD 216525. The Observatory 129, 264 (2009). 24. GRIFFIN, R. F. & McCLURE, R. D.: Spectroscopic binary orbits for the Henry Draper Catalogue stars. The Observatory 129, 28 (2009). 25. HALWACHS J.-L. et al: Local effects in astrometric binary orbits: perspective transformation and light-travel time. Mont. Not. RAS 394, 1075 (2009). 26. HARTKOPF, W. I. & MASON B. D.: Speckle Interferometry at Mount Wilson Observatory: Observations Obtained in 2006-2007 and 35 New Orbits. Astron. J. 138, 813 (2009). 27. HELMINIAK, K. G. et al: Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - I. A sample of systems with components' masses between 1 and 2 Msolar. Mont. Not. RAS 400, 969 (2009). 28. HINKLE, K. H. FEKEL, F. C. & JOYCE R. R.: Infrared Spectroscopy of Symbiotic Stars. VII. Binary Orbit and Long Secondary Period Variability of CH Cygni. Astrophys. J. 692, 1360 (2009). 29. HORCH, E. P. et al: Observations of Binary Stars with the Differential Speckle Survey Instrument. I. Instrument Description and First Results. Astron. J. 137, 5057 (2009). 30. JAO, W-C. et al: Cool Subdwarf Investigations. II. Multiplicity. Astron. J. 137, 3800 (2009). 31. JORISSEN, A. et al.: Spectroscopic binaries among Hipparcos M giants. III. The eccentricity - period diagram and mass-transfer signatures. Astron. Astrophys. 498 (2), 489 (2009). 32. KISELEV, A. A.; ROMANENKO, L. G. & GORYNYA, N. A.: A dynamical study of the wide hierarchic triple star ADS 10288. Astron. Reports 53 (12), 1136 (2009). 33. KISELEV, A. A.; ROMANENKO, L. G. & KALINICHENKO, O. A.: A dynamical study of 12 wide visual binaries. Astron. Reports 53, 126 (2009). 34. KRAUS, S. et al.: Tracing the young massive high-eccentricity binary system theta 1 Orionis C through periastron passage. Astron. Astrophys. 497 (1), 195 (2009). 35. KONACKI, M. et al.: The Radial Velocity Tatooine Search for Circumbinary Planets: Planet Detection Limits for a Sample of Double-Lined Binary Stars. Initial Results from Keck I/Hires, Shane/CAT/Hamspec, and TNG/Sarg Observations. Astrophys. J. 704, 513 (2009). 36. MAKAROV, V. V. & EGGLETON, P. P.: The Origin of Bright X-ray Sources in Multiple Stars. Astrophys. J. 703, 1760 (2009). 37. MASON, B. D. et al: The High Angular Resolution Multiplicity of Massive Stars. Astron. J. 137, 3358 (2009). 38. NOVAKOVIC, B.; PAVLOVIC, R. & CVETKOVIC, Z.: Review of CCD Observations of Binaries at NAO Rozhen. Pub Aston. Obs. Belgrade. 86 337 (2009). 39. ORLOV, V. G. et al.: Speckle Interferometry at the Observatorio Astron'omico Nacional. I. Rev. Mex. A. A. 45 (1), 155 (2009). 40. PARKER et al: Local effects in astrometric binary orbits: perspective transformation and light-travel time. Mont. Not. RAS 397, 1577 (2009). 41. PRIEUR, R. J. et al: Do binaries in clusters form in the same way as in the field?. Mont. Not. RAS 395, 970 (2009). 42. PRIEUR, J.-L. et al: Speckle observations with PISCO in Merate - VII. Astrometric measurements of visual binaries in 2007. Mont. Not. RAS 395, 907 (2009). 43. RAGHAVAN, D. et al.: The Visual Orbit of the 1.1 Day Spectroscopic Binary sigma 2 Coronae Borealis from Interferometry at the Chara Array. Astrophys. J. 690, 394 (2009). 44. RAMM, D. J. et al.: Spectroscopic orbits for K giants beta Reticuli and nu Octantis: what is causing a low-amplitude radial velocity resonant perturbation in nu Oct?. Monthly Notices of the RAS 394 (3), 1695 (2007). 45. SCARDIA, R. et al: Speckle observations with PISCO in Merate: VI. Astrometric measurements of visual binaries in 2006. Mont. Not. RAS 330, 55 (2009). 46. SCHAEFER, G. et al: New Frontiers in Binary Stars: Science at High Angular Resolution. astro2010S, 259 (2009). 47. TEN BRUMMELAAR, T. et al: Astrometry and Photometry of Binary Exoplanet Host Stars. AAS Meeting 214, 1122 (2009). 48. ZASCHE, P. et al.: A Catalog of Visual Double and Multiple Stars With Eclipsing Components. Astron. J. 138, 664 (2009). ========================================================================================== JOHN DAVIS (1932 - 2010) Professor John Davis passed away peacefully in his sleep on Friday, 15 January 2010 in Sydney Australia. Prof. Davis obtained his Ph.D. from the University of Manchester and after a short post-doc moved to Australia in the early 1960's to join Hanbury Brown in the development and use of the Intensity Interferometer, for in his own words "no young post-doc in his right mind would have said anything other than yes, please!". The Intensity Interferometer was operational from 1963-1974, after which Prof. Davis led the effort along with William Tango to establish its successor, the Sydney University Stellar Interferometer whose work is ongoing. John's career is summarized in his own words in the personal remarks following the text of his Ellery Lecture from 2006 (Pub. Astron. Soc. Aus. 23, 94-104, 2006 - http : //www.publish.csiro.au/?act = viewf ile&f ileid = AS06012.pdf ). Prof. Davis was engaged in active research till the end, and his influence on the field of high resolution Astronomy, both in his research and in the training of several generations of interferometry "black belts" will be felt for many years to come. He is survived by his wife Madeline and his children, and will be sorely missed by those of us fortunate enough to have known him. Theo ten Brummelaar The CHARA Array on Mount Wilson Georgia State University ========================================================================================== FORTHCOMING MEETING First announcement Ever wondered what you could do with the 100 million binaries that will be observed with the forthcoming Gaia space astrometry mission from the European Space Agency? Ever wondered whether your favorite binary will be extensively observed or whether binary members will improve or degrade the results you expect for your favorite star cluster? The GREAT (http://www.ast.cam.ac.uk/GREAT) working group on Binaries and Multiple Systems is setup to deal with these kinds of questions. It gathers scientists interested in using the Gaia results for their scientific exploitation as well as those working on processing the observations in the first place. This think tank welcomes anybody interested in double and multiple stars in anticipation of the Gaia harvest. Belonging to any GREAT working group does not offer any privileged/early access to the Gaia data but it increases the likelihood of being ready to efficiently interpret them whenever they become public. The kick-off meeting of the GREAT - Binaries and Multiple Systems working group will take place in Brussels (Belgium) in May 17 and 18. Details at: http://camd08.ast.cam.ac.uk/Greatwiki/WGB3BinariesAndMultipleSystems Looking forward to welcoming you in this working group, D. Pourbaix & F. Arenou ========================================================================================== NEW OFFICERS FOR THE COMMISSION 26 EXECUTIVE BODIES During the 27th General Assembly of the IAU, the following Officers of the Commission and its Organizing Committee (OC) took their charges: Name Charge Term E-mail address -------------------------------------------------------------------------------- Jose Docobo President 2009 - 2012 joseangel.docobo@usc.es Brian Mason Vice-President 2009 - 2012 bdm@usno.navy.mil Frederic Arenou OC Member 2009 - 2015 Frederic.Arenou@obspm.fr Marco Scardia OC Member 2009 - 2015 scardia@merate.mi.astro.it Vakhtang Tamazian OC Member 2009 - 2015 vakhtang.tamazian@usc.es Yuri Balega (balega@sao.ru), Dimitri Pourbaix (pourbaix@astro.ulb.ac.be), and Colin Scarfe (scarfe@uvic.ca) continue to serve as Organizing Committee members until 2012. ****************************************************************************************** The deadline for contributions to Information Circular No. 171 is: June 15th 2010 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 171 (JUNE 2010) NEW ORBITS ADS Name P (yr) T e W(2000) 2010 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2011 ---------------------------------------------------------------------------------------- 2578 A 983 587. 1964.83 0.591 150.8 140.3 0.469 DOCOBO 03310+2937 0.6133 0.748 63.2 245.3 2007.8181 140.8 0.477 & LING - COU 691 55.88 1961.93 0.141 66.5 252.3 0.140 DOCOBO 03423+3141 6.4424 0.155 66.2 258.2 2007.8181 255.6 0.133 & LING 3058 HU 302 237.2 1883.11 0.960 141.0 54.2 0.239 DOCOBO 04132+2258 1.5177 0.748 80.6 89.6 2007.818 54.8 0.239 & CAMPO 3438 A 1544AB 79.10 1961.30 0.424 107.7 187.9 0.170 DOCOBO 04475+4324 4.5512 0.164 138.9 78.3 2007.802 185.0 0.169 - FIN 320 43.36 2006.36 0.852 20.5 156.6 0.089 DOCOBO & 04515-3454 8.3026 0.248 108.6 110.2 2008.770 146.0 0.091 ANDRADE 8239 BU 456 706.0 1914.42 0.748 43.0 159.4 1.104 SCARDIA 11368-1221 0.5099 1.69 53.3 327.1 2009.260 159.9 1.113 et al. (*) - B 1215 57.08 1938.18 0.641 67.0 348.1 0.203 RICA 12392-4022 6.3069 0.225 48.7 125.5 2009.2626 351.8 0.211 10227 BU 627A-BC 1977.3 1966.00 0.329 77.6 36.5 1.996 RICA 16492+4559 0.1821 4.914 63.8 280.2 2009.4404 36.9 2.009 12079 HO 98AB 628. 2022.21 0.497 83.1 65.2 0.203 LING 19083+2706 0.5733 0.433 123.0 54.2 2007.668 64.0 0.199 12348 A 102A 429. 1992.26 0.653 67.5 247.9 0.170 LING 19222-0735 0.8392 0.352 40.0 106.9 2008.5482 249.9 0.175 - KUI 103 29.16 2006.23 0.557 96.8 5.3 0.385 DOCOBO 21000+4004 12.3457 0.725 53.0 156.1 2007.699 24.1 0.453 & LING - FIN 329 17.60 1957.67 0.933 35.4 49.4 0.081 DOCOBO & 21158-5316 20.4545 0.244 107.8 98.5 2008.606 188.9 0.065 ANDRADE - FIN 330AB 20.50 2006.90 0.512 27.3 53.4 0.069 DOCOBO & 21477-3054 17.5610 0.112 110.6 190.5 2008.770 43.7 0.098 ANDRADE I - FIN 330AB 20.84 2009.07 0.907 71.1 235.6 0.070 DOCOBO & 21477-3054 17.2745 0.136 119.3 69.9 2008.770 226.7 0.101 ANDRADE II (*) SCARDIA, PRIEUR, PANSECCHI, & ARGYLE ========================================================================================== ANNOUNCEMENT FORTHCOMING MEETING Taking into account the excellent results of the meeting held in Santiago de Compostela last year, it is our intention to promote a similar mini-workshop at the end of January 2011. Event information will be announced by e-mail in September. J. A. Docobo ****************************************************************************************** The deadline for contributions to Information Circular No. 172 is: October 15th 2010 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 172 (OCTOBER 2010) NEW ORBITS ADS Name P (yr) T e W(2000) 2010 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2011 ---------------------------------------------------------------------------------------- - HDS 17 12.81 2006.30 0.527 57.0 90.1 0.114 CVETKOVIC 00085+3456 28.0938 0.090 150.9 173.8 2007.8201 78.6 0.128 - COU 547 265.0 1984.9 0.737 31.7 50.0 0.128 ZIRM 00320+2740 1.3585 0.322 79.9 295.9 2007.9890 51.1 0.126 1016 A 2102 132.5 2061.5 0.175 146.1 114.8 0.211 DOCOBO 01158+0947 2.7170 0.575 100.0 225.0 2008.7699 111.0 0.192 & LING 1158 BU 1164AB 63.73 2008.19 0.771 163.9 221.2 0.039 DOCOBO 01277+0521 5.6488 0.291 107.7 196.0 2008.7699 191.7 0.082 & LING 1323 A 2404 114.3 1960.9 0.073 179.2 7.3 0.221 ZIRM 01409+0138 3.1496 0.235 104.7 352.4 1996.8657 6.5 0.226 - MCA 6 40.97 1989.39 0.374 43.5 307.9 0.110 CVETKOVIC 02145+6631 8.7860 0.084 20.6 84.1 2008.0688 312.5 0.117 2242 BU 741AB 149.89 1870.68 0.602 163.5 342.4 0.896 RICA 02572-2458 2.4018 1.425 83.0 260.8 2009.707 343.0 0.860 - HDS 433 51.78 2008.41 0.569 109.9 158.5 0.202 CVETKOVIC 03272+0944 6.9525 0.442 24.6 6.0 2008.7701 181.1 0.224 - RST2347 150.3 2008.7 0.498 155.5 181.4 0.087 ZIRM 04318-2407 2.3952 0.197 128.0 310.8 1993.0923 175.2 0.093 - I 1489 32.90 1999.53 0.141 80.3 102.0 0.144 DOCOBO 04395-4507 10.9422 0.256 77.2 292.8 2008.773 111.8 0.112 & CAMPO - I 5 217.6 2033.9 0.336 91.6 107.0 0.404 ZIRM 06380-6132 1.6544 2.004 93.9 357.3 2008.7730 104.7 0.462 7124 HU 718 139.77 1879.38 0.783 34.3 45.0 0.273 RICA 09005+3225 2.5757 0.552 102.1 79.3 2010.062 43.6 0.266 - JSP 418 283.1 1972.4 0.902 172.5 139.4 0.480 ZIRM 10423-3612 1.2716 0.669 66.1 144.0 1993.0902 139.8 0.490 8035 BU 1077AB 44.45 2002.17 0.439 9.3 21.0 0.582 SCARDIA 11037+6145 8.0994 0.590 159.9 232.8 2010.384 14.4 0.619 et al. (*) 9982 STF2026 441.8 1907.05 0.810 14.3 17.9 3.418 SCARDIA 16160+0721 0.8148 2.380 133.0 194.7 2009.593 17.8 3.435 et al. (*) - MLR 198 54.4 1992.92 0.657 169.7 68.3 0.247 SCARDIA 16420+7353 6.6176 0.195 147.7 299.4 2009.637 65.8 0.253 et al. (*) 10345 STF2130 812.0 1946.19 0.514 282.9 8.0 2.403 SCARDIA 17053+5428 0.4433 4.476 142.2 193.3 2010.538 7.0 2.420 et al. (*) 10850 STT 338AB 1276.6 1799.91 0.582 28.2 165.4 0.830 SCARDIA 17520+1520 0.2820 1.144 124.2 111.1 2010.669 165.2 0.830 et al. (*) 11484 STT 357 411.0 1968.32 0.317 93.8 76.7 0.376 SCARDIA 18360+1144 0.8759 0.511 124.8 321.9 2009.670 75.8 0.375 et al. (*) 13048 B 454 47.21 2006.84 0.764 153.8 327.5 0.112 DOCOBO & 19531-2528 7.6255 0.196 78.8 32.0 2009.263 329.8 0.145 CAMPO I 13048 B 454 100.62 1957.00 0.184 160.4 325.4 0.088 DOCOBO & 19531-2528 3.5778 0.332 86.6 275.7 2009.263 327.9 0.104 CAMPO II 13186 STT 392AB 270.3 2027.0 0.523 140.9 156.7 0.135 ZIRM 19579+4216 1.3319 0.260 112.7 34.1 1997.65 155.1 0.136 14379 HO 144 1644. 1944.84 0.791 168.9 347.6 0.361 LING 20524+2008 0.2190 1.031 91.5 116.9 2007.704 347.5 0.361 - HDS3004AB 91.91 2025.63 0.473 106.9 37.0 0.223 LING 21051+0757 3.9169 0.478 63.2 36.1 2008.7669 44.1 0.225 - HDS3083 12.08 2006.58 0.335 149.7 3.5 0.138 CVETKOVIC 21399+2737 29.7967 0.216 69.9 108.2 2008.4641 36.9 0.101 (*) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ****************************************************************************************** The deadline for contributions to Information Circular No. 173 is: February 15th 2011 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 173 (FEBRUARY 2011) NEW ORBITS ADS Name P (yr) T e W(2000) 2011 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2012 ---------------------------------------------------------------------------------------- - FIN 333 33.31 1994.63 0.96 212.6 214.6 0.452 MASON & 02434-6643 10.8086 0.465 91.2 119.9 2010.9656 214.6 0.462 HARTKOPF 2397 STT 51 598. 2051.69 0.718 148.6 342.6 0.626 LING 03130+4417 0.6020 0.998 43.0 308.9 2009.700 343.4 0.614 - BU 1004 AB 410. 2066.69 0.244 145.4 59.1 1.206 DOCOBO 04021-3429 0.8781 1.452 160.2 160.8 2008.7676 58.0 1.200 & LING - HDS 521 21.64 1996.78 0.684 218.1 304.7 0.190 MASON & 04070-1000 16.6340 0.2261 122.5 76.5 2010.9657 295.2 0.183 HARTKOPF 3315 HU 1084 488. 1966.00 0.894 34.9 74.2 0.254 LING 04357+3944 0.7377 0.681 105.9 137.9 2008.8498 73.5 0.261 3748 A 484 37.61 2005.0 0.007 125.0 306.6 0.203 MASON & 05103-0736 9.5714 0.2058 101.7 113. 2010.9658 304.6 0.205 HARTKOPF 5092 B 114 59.64 1977.24 0.543 160. 5.6 0.636 MASON & 06274-2544 6.0360 0.4219 19.1 18. 2010.9796 7.7 0.630 HARTKOPF 5956 A 2123 AB 80.3 1981.10 0.940 135.9 354.2 0.395 MASON & 07171-1202 4.4825 0.641 77.8 79.2 2010.8950 355.0 0.391 HARTKOPF - B 1624 74.12 1997.78 0.2133 90.65 213.2 0.167 MASON & 08421-5245 4.8571 0.445 70.0 14.0 2010.9661 223.3 0.191 HARTKOPF - I 10 AB 146.97 2000.78 0.482 344.7 294.0 0.446 MASON 08447-5443 2.4495 2.002 105.6 8.5 2010.0658 281.1 0.404 7012 A 2552 82.4 1968.7 0.230 212.9 40.8 0.305 MASON & 08487+0057 4.3677 0.253 125.8 343. 2010.9659 39.1 0.307 HARTKOPF - HDO 207 AB 78.5 1968.2 0.843 215.1 93.3 0.144 MASON & 09128-0950 4.5863 0.343 78.7 80.5 2010.9662 96.1 0.139 HARTKOPF 7334 A 1342 AB 52.58 1963.4 0.052 202.6 200.9 0.160 MASON & 09228-0950 6.8469 0.1675 68.1 33. 2010.9690 203.7 0.160 HARTKOPF - FIN 349 40.99 1971.80 0.402 138.8 159.7 0.089 MASON & 09317+0152 8.7816 0.156 54.7 72.2 2010.9689 177.7 0.071 HARTKOPF - FIN 308 AB 65.2 1957. 0.022 249.8 102.6 0.144 MASON & 10282-2548 5.5200 0.176 51.8 291. 2010.9689 108.0 0.137 HARTKOPF 8094 STF 1517 AB 924. 1393.49 0.489 120.4 317.2 0.662 RICA 11137+2008 0.3896 2.278 93.6 256.5 2010.0649 316.9 0.671 - COU 1291 82.0 1969.44 0.434 140.7 303.9 0.280 DOCOBO 17075+3810 4.3902 0.221 61.3 326.7 2009.4303 305.0 0.284 & LING 15182 A 772 138.7 1999.56 0.549 42.8 77.1 0.131 DOCOBO & 21395+3009 2.5963 0.198 152.7 233.7 2010.504 72.9 0.138 TAMAZIAN 15843 BU 1216 503. 1837.83 0.833 23.9 278.2 0.872 LING 22202+2931 0.7157 0.774 130.1 289.9 2009.755 278.0 0.874 ========================================================================================== PAPERS PUBLISHED IN 2010 1. ABT, H. A.: The Origin of the Exoplanets. Pub. Astron. Soc. of the Pacific 122, 1015 (2010). 2. ALLEN, C. et al: Commission 26: Double and Multiple Stars. Transactions IAU, 6, (T27) 191 (2010). 3. ALLERS, K. N. et al. : Discovery of A Young L Dwarf Binary, SDSS J224953.47+004404.6 AB. Astrophys. J. 715, 561 (2010). 4. BALEGA, I. I., BALEGA, Y. Y. & MALOGOLOVETS, E. V.: Orbits of new Hipparcos binaries: III. Astrophys. Bull. 65 (3), 250 (2010). 5. BERNAT, D. et al. : A Close Companion Search Around L Dwarfs Using Aperture Masking Interferometry and Palomar Laser Guide Star Adaptive Optics. Astrophys. J. 715, 724 (2010). 6. BORKOVITS, T., PARAGI, Z. & CSIZMADIA, S.: On the formation of close binaries - an interferometric look on Algol(s). J. of Physics Conf. Ser. 218, 2005 (2010). 7. BROZ, M. et al.: A Unified Solution for the Orbit and Light-time E®ect in the V505 Sgr System. Astron. J. 139, 2258 (2010). 8. CABALLERO, J. A. et al.: The magnetically-active, low-mass, triple system WDS 19312+3607 (Research Note). Astron. Astrophys. 520, 91 (2010). 9. CVETKOVIC, Z. & NINKOVIC, S.: On the Component Masses of Visual Binaries. Serbian Astron. J. 180 71 (2010). 10. CVETKOVIC, Z. & NOVAKOVIC, B.: Eight new and three recalculated orbits for binaries. Astron. Nach. 331 304 (2010). 11. CVETKOVIC, Z.; PAVLOVIC, R. & BOEVA, S.: CCD Measurements of Double and Multiple Stars at NAO Rozhen. IV. Serbian Astron. J. 180 103 (2010). 12. CVETKOVIC, Z.; VINCE, I. & NINKOVIC, S.: A new orbit of binary 15 Monocerotis. New Astron. 15, 302 (2010). 13. CVETKOVIC, Z., PAVLOVIC, R. & NINKOVIC, S.: A New Recalculated Orbit for the Visual Binary CHR 90. Astron. J. 140 25 (2010). 14. DOCOBO, J. A. et al.: EMCCD Speckle Interferometry with the 6 m Telescope: Astrometric Measurements, Di®erential Photometry, and Orbits. Astron. J. 140, 1078 (2010). 15. DUPUY, T. J. et al. : Studying the Physical Diversity of Late-M Dwarfs with Dynamical Masses. Astrophys. J. 721, 1725 (2010). 16. EGGLETON, P. P.: Evolution of intermediate and low mass binary systems. New Astron. Rew. 54, 45 (2010). 17. FARRINGTON, C. D. et al.: Separated Fringe Packet Observations with the CHARA Array. I. Methods and New Orbits for Â Draconis, HD 184467, and HD 198084. Astron. J. 139, 2308 (2010). 18. FEKEL, F. C. & Williamson, M. H.: New Precision Orbits of Bright Double-lined Spectroscopic Binaries. V. The Am Stars HD 434 and 41 Sextantis. Astron. J. 140, 1381 (2010). 19. FEKEL, F. C., TOMKIN, J. & Williamson, M. H.: New Precision Orbits of Bright Double- lined Spectroscopic Binaries. IV. 66 Andromedae, HR 6979, and HR 9059. Astron. J. 139, 1579 (2010). 20. FEKEL, F. C. et al.: Infrared Spectroscopy of Symbiotic Stars. VIII. Orbits for Three S-Type Systems: AE Arae, Y Coronae Australis, and SS 73-147. Astron. J. 139, 1315 (2010). 21. GIES, D. et al.: Massive Star Studies with the CHARA Array. Rev. Mex. A. A. Conf Ser 38, 133 (2010). 22. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 210: Psi2 Aurigae and 34 Pegasi. The Observatory 130, 17 (2010). 23. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 211: HD 128642, HD 144601, HD 150172, and HD 155641. The Observatory 130, 75 (2010). 24. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 212: HD 113449, HD 113762, HD 113880, and HD 119944. The Observatory 130, 125 (2010). 25. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 213: HD 179332, HD 181386, and their visual companions. The Observatory 130, 232 (2010). 26. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 214: HR 6790, HR 6886, HR 6901, and HR 7137. The Observatory 130, 299 (2010). 27. GRIFFIN, R. F.: Spectroscopic binary orbits from photoelectric radial velocities - Spectroscopic binary orbits from photoelectric radial velocities - Paper 215: HD 105074, HD 105182, HD 108613, and HD 115445. The Observatory 130, 349 (2010). 28. GRIFFIN, R. F. & FILIZ, A. N.: Orbits of six late-type active-chromosphere binaries. Astrophys. Space Science 330, (1), 47 (2010). 29. GRIFFIN, R. E. M. & GRIFFIN, R. F.: Composite spectra Paper 16: HR 3222, a 2.5-yr binary with a metallic-line secondary. Mont. Not. RAS 402, 1675 (2010). 30. GROH, J. H. et al.: Detection of high-velocity material from the wind-wind collision zone of Eta Carinae across the 2009.0 periastron passage. Astron. Astrophys. 517, A9 (2010). 31. HARTKOPF, W. I.: Hot Binaries: Observational Results. Rev. Mex. A. A. 38 19 (2010). 32. HELMINIAK, K. & KONACKI, M.: Precise Astrometry of Visual Binaries with Adaptive Optics. A way for ¯nding exoplanets?. EAS Publ. Ser. 41, 103 (2010). 33. HINKLE, K. H., FEKEL, F. C. & JOYCE, R. R.: Symbiotic Stars: Infrared Spectroscopy and Orbits. Bull. AAS 42, 268 (2010). 34. HORCH, E. P. et al: CCD Speckle Observations of Binary Stars with the WIYN Telescope. VI. Measures During 2007-2008. Astron. J. 139, 205 (2010). 35. HOWELL, S. B. et al: Kepler Observations of Three Pre-launch Exoplanet Candidates: Discovery of Two Eclipsing Binaries and a New Exoplanet. Astrophys. J. 725, 1633 (2010). 36. IZMAILOV, I. S. et al.: Astrometric CCD Observations of Visual Double Stars at the Pulkovo Observatory. Astron. Letters 36, (5) 349 (2010). 37. KIYAEVA, O. V, GORYNYA, N.A. & IZMAILOV I. S.: Astrometric study of the relative motion of three stars with possible invisible companions based on homogeneous series obtained at Pulkovo with a 26-inch refractor. Astron. Letters 36, (3) 204 (2010). 38. KONACKI, M. et al. : High-precision Orbital and Physical Parameters of Double-lined Spectroscopic Binary StarsHD78418, HD123999, HD160922, HD200077, and HD210027. Astrophys. J. 719, 1293 (2010). 39. LING, J. F.: First Orbit Solutions and Calculated Masses of 10 Visual Binaries. Astron. J. 139, 1521 (2010). 40. LIU, M. C., DUPUY, T. J. & LEGGETT, S. K.: Discovery of a Highly Unequal-mass Binary T Dwarf with Keck Laser Guide Star Adaptive Optics: A Coevality Test of Substellar Theoretical Models and E®ective Temperatures. Astrophys. J. 722, 331 (2010). 41. LOSSE, F.: Double stars measurements: 2009-2010 campaing. Obs. & Trav. 75, 17 (2010). 42. MARTYNOVA, A. I. & ORLOV, V. V.: Analysis of regions of stability in the vicinity of a new periodic S orbit in the three-body problem. Astron. Reports 54, (9) 797 (2010). 43. MASON, B. D, HARTKOPF, W. I. & McALISTER, H. A.: Binary Star Orbits. III. Revisiting the Remarkable Case of Tweedledum and Tweedledee. Astron. J. 140, 242 (2010). 44. MASON, B. D, HARTKOPF, W. I. & WYCOFF, G. L.: Speckle Interferometry at the U.S. Naval Observatory. XV. Astron. J. 140, 480 (2010). 45. MASON, B. D, HARTKOPF, W. I. & TOKOVININ, A. A.: Binary Star Orbits. IV. Orbits of 18 Southern Interferometric Pairs. Astron. J. 140, 753 (2010). 46. MELIKIAN, N. D. et al.: Spectral observations of the eclipsing binary RY Sct. Astroph. 53 (2), 202 (2010). 47. MELIKIAN, N. D. et al.: Spectral and photometric observations of TT Ari. III. Astroph. 53 (3), 373 (2010). 48. MILIC, I. S. & CVETKOVIC, Z.: Correlations of Orbital Elements for Visual Double Stars. Serbian Astron. J. 181 69 (2010). 49. MUTERSPAUGH, M. W. et al.: The Phases Di®erential Astrometry Data Archive. I. Measurements and Description. Astron. J. 140, 1579 (2010). 50. MUTERSPAUGH, M. W. et al.: The Phases Di®erential Astrometry Data Archive. II. Updated Binary Star Orbits and a Long Period Eclipsing Binary. Astron. J. 140, 1623 (2010). 51. MUTERSPAUGH, M. W. et al.: The Phases Di®erential Astrometry Data Archive. III. Limits to Tertiary Companions. Astron. J. 140, 1631 (2010). 52. MUTERSPAUGH, M. W. et al.: The Phases Di®erential Astrometry Data Archive. IV. The Triple Star Systems 63 Gem A and HR 2896. Astron. J. 140, 1646 (2010). 53. MUTERSPAUGH, M. W. et al.: The Phases Di®erential Astrometry Data Archive. V. Candidate Substellar Companions to Binary Systems. Astron. J. 140, 1657 (2010). 54. ORLOV, V. G. et al.: Speckle Interferometry at the Observatorio Astronomico Nacional. II Rev. Mex. A. A. 46, 245 (2010). 55. PRIEUR, R. J. et al: Speckle observations with PISCO in Merate - IX. Astrometric measurements of visual binaries in 2008. Mont. Not. RAS 407, 1913 (2010). 56. RAGHAVAN, D.: A Survey of Stellar Families: Multiplicity of Solar-type Stars. Astrophys. J. Sup. Ser. 190 (1), 1 (2010). 57. REIPURTH, B. et al: Orphaned Protostars. Astrophys. J. L. 725, 56 (2010). 58. RICA, F. M.: Orbital elements for eight binaries. Study of the nature of wide components. I. Rev. Mex. A. A. 46 263 (2010). 59. RIEDEL, A. R. et al: The Solar Neighborhood. XXII. Parallax Results from the CTIOPI 0.9 m Program: Trigonometric Parallaxes of 64 Nearby Systems with 0".5 < mu < 1".0 yr-1 (SLOWMO Sample). Astron. J. 140, 897 (2010). 60. SCARDIA, R. et al: Speckle observations with PISCO in Merate: VIII. Astrometric measurements of visual binaries in 2007 and new orbits of the multiple system Zeta Aqr. Astron. Nach. 331, 286 (2010). 61. SCHAEFER, G. et al: Masses and Distance to the Young Triple Star Elias 12. Bull. AAS 42, 354 (2010). 62. SHAKHT, N. A. et al.: Orbit determination and estimate of the component masses. Astroph. 53 (2), 227 (2010). 63. ZASCHE, P. & UHLAR, R.: The triple system KR Comae Berenices. Astron. Astroph. 519A, 78 (2009). 64. ZHUCHKOV, R. Y. et al.: Physical and dynamical parameters of the multiple system HD 222326. Astron. Reports 52, (7) 546 (2010). 65. ZHUCHKOV, R. Y. et al.: Physical parameters and dynamical properties of the multiple star o And. Astron. Reports 54, (12) 1134 (2010). 66. ZHUCHKOV, R. Y., KIYAEVA, O. V. & ORLOV, V. V.: Criteria for the stability of triple systems and their application to observations of multiple stars. Astron. Reports 54, (1) 38 (2010). ****************************************************************************************** The deadline for contributions to Information Circular No. 174 is: June 15th 2011 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 174 (JUNE 2011) NEW ORBITS ADS Name P (yr) T e W(2000) 2011 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2012 ---------------------------------------------------------------------------------------- 17178 HLD 60 223.2 1903.08 0.648 324.7 168.9 1.286 HARTKOPF 00014+3937 0.1774 0.880 128.3 325.7 2009.7330 168.6 1.290 & MASON - HDS 93 94.28 2006.69 0.226 50.7 43.7 0.265 CVETKOVIC 00428+1249 3.8185 0.339 134.5 343.6 2007.0092 39.4 0.265 709 STF 67 4133. 1741. 0.908 216. 349.9 2.272 HARTKOPF 00521+1036 0.0871 5.982 113.3 102.0 2008.8876 349.8 2.274 & MASON 1406 STF 158AB 2239. 2089.7 0.764 278. 272.2 2.055 HARTKOPF 01467+3310 0.1608 5.351 78.8 65. 2008.8663 272.4 2.049 & MASON 1632 A 957 219.97 1870.07 0.462 107.7 14.3 0.375 ZIRM 02048+6030 1.6366 0.471 125.3 250.1 1997.04 12.9 0.374 & RICA - FIN 312 2.653 2009.66 0.226 105.3 309.6 0.128 DOCOBO & 02396-1152 135.6903 0.106 24.0 25.1 2009.671 68.9 0.088 ANDRADE 2273 A 1530 127.9 2020.7 0.739 79.3 73.7 0.267 HARTKOPF 03005+3934 2.8147 0.492 83.1 78.7 2008.8582 74.5 0.262 & MASON 2468 HJ 663 2029. 2283. 0.26 97. 201.0 2.150 ROBERTS 03128-0112 0.1774 9.87 104. 342. 2002.6845 200.2 2.141 & HARTKOPF - BU 787AB 655.84 2264.91 0.261 130.5 292.8 4.659 CVETKOVIC 03342+4837 0.5489 4.988 70.0 291.6 2010.6900 293.0 4.677 - DAW 79 97.138 1999.55 0.703 155.1 142.7 0.399 MASON & 04024-2832 3.7061 0.454 130.3 249.8 2010.5864 140.6 0.416 HARTKOPF - HEI 35 28.91 2000.53 0.832 165.9 333.2 0.446 RICA 04102+1722 12.4524 0.282 115.7 35.9 2008.6915 332.1 0.449 & ZIRM - RST5501 84.428 2004.43 0.516 219.3 202.0 0.146 MASON & 04545-0314 4.2640 0.241 120.7 311.2 2010.0652 196.9 0.146 HARTKOPF 3822 HU 1224 1656. 2111. 0.77 100. 114.5 1.032 HARTKOPF 05148+1232 0.2174 2.3 105.0 71. 2009.1230 114.3 1.031 & MASON 5172 A 670 150.438 1989.53 0.689 177.5 175.8 0.363 MASON & 06319-0938 2.3930 0.360 63.9 222.0 2010.0656 176.5 0.374 HARTKOPF 5571 A 2833 209.09 1987.13 0.927 107.2 138.9 0.411 ZIRM 06549+1158 1.7218 0.429 43.1 240.7 2004.2034 139.4 0.420 & RICA - I 7 85.204 1958.74 0.967 237.7 204.5 0.733 MASON & 07175-4659 4.2252 1.001 102.9 248.5 2010.0656 204.1 0.720 HARTKOPF 6138 A 2869 156.116 1996.23 0.785 302.7 123.2 0.192 MASON & 07305+0743 2.3060 0.230 149.0 45.7 2010.9688 121.6 0.201 HARTKOPF 7316 A 1082AB 212.7 1987.66 0.644 5.0 210.3 0.436 DOCOBO 09207-0742 1.6925 0.600 127.0 24.2 2009.2652 208.9 0.453 & LING 7380 STF1355 591. 2139.52 0.623 146.4 353.5 1.854 LING 09273+0614 0.6091 1.733 51.1 2.8 2009.2597 353.7 1.843 8230 STF1554 478.88 1962.44 0.902 84.6 214.1 0.281 ZIRM 11361+1251 0.7518 0.868 74.8 308.6 2004.2068 214.9 0.288 & RICA 8547 BU 606 707.61 2009.44 0.383 100.1 289.7 0.524 RICA 12260-1457 0.5088 1.441 96.9 123.6 2006.1997 289.3 0.539 & ZIRM - HJ 4539AB 83.35 1931.25 0.793 187.9 298.0 0.19 ALZNER 12415-4858 4.3191 0.869 113.7 2.6 2010.63 266.9 0.14 & ARGYLE - FIN 369 25.25 1999.19 0.374 20.1 287.9 0.069 CVETKOVIC 13320-6519 14.2572 0.152 71.4 95.0 2009.2627 309.3 0.070 - FIN 369 24.77 1998.89 0.377 19.2 292.9 0.065 DOCOBO & 13320-6519 14.5337 0.155 72.2 93.1 2009.2627 314.6 0.071 ANDRADE 9025 STT 270 996. 2035. 0.76 174. 51.9 2.011 ROBERTS 13473+1727 0.3614 8.01 49. 322. 2001.0994 54.5 1.945 & MASON - I 952 99.13 1981.39 0.659 27.1 322.4 0.707 RICA 14531-4638 3.6316 0.521 156.1 268.1 2009.2602 321.1 0.716 & ZIRM 9473 HU 907 259.8 2123.28 0.290 157.5 279.3 0.228 LING 15002+2129 1.3857 0.339 62.2 272.0 2009.4413 280.7 0.230 - CHR 259 33.75 2003.87 0.747 44.0 162.5 0.226 CVETKOVIC 15496-0326 10.6679 0.255 128.5 98.6 2009.2658 157.1 0.235 - LAB 4 14.82 1990.10 0.058 16.4 346.4 0.047 DOCOBO & 16341+4226 24.2915 0.114 102.0 278.9 2010.498 278.1 0.025 TAMAZIAN 10425 STT 327 88.402 1968.19 0.653 146.4 332.2 0.453 MASON & 17141+5608 4.0723 0.278 57.3 12.3 2010.5081 332.8 0.452 HARTKOPF - COU 415 94.449 1989.72 0.383 129.3 247.6 0.251 MASON & 17221+2310 3.8116 0.308 135.2 125.5 2009.4388 243.9 0.252 HARTKOPF - B 912 132.256 1944.75 0.113 226.8 171.9 0.256 MASON & 17308-3726 2.7220 0.297 44.9 116.2 2010.5856 174.5 0.259 HARTKOPF 12746 HU 953 282.797 2002.84 0.686 184.4 40.0 0.261 MASON & 19389+3514 1.2730 0.680 30.8 156.0 2007.6016 45.2 0.270 HARTKOPF 14126 STT 410AB 1408. 1708. 0.67 203. 4.2 0.865 HARTKOPF 20396+4035 0.2557 0.751 126. 63. 2008.8575 4.1 0.866 & MASON 14889 STT 437AB 1421. 1789.6 0.759 255. 19.5 2.410 HARTKOPF 21208+3227 0.2533 2.589 141.0 97.0 2008.8685 19.3 2.415 & MASON 15007 STF2799AB 978. 1735. 0.530 187. 259.7 1.853 HARTKOPF 21289+1105 0.3681 2.098 131.0 133. 2009.6550 259.5 1.858 & MASON 15007 STF2799AB 1140.01 2880.08 0.335 23.8 260.2 1.833 CVETKOVIC 21289+1105 0.3158 1.860 151.6 357.8 2010.6874 260.0 1.837 - HDO 296AB 27.57 1993.45 0.546 100.6 107.5 0.288 DOCOBO & 21552-6153 13.0577 0.273 82.9 206.3 2009.755 108.8 0.252 CAMPO - WOR 11 130.21 2049.06 0.101 19.0 237.9 1.434 CVETKOVIC 22234+3228 2.7648 1.610 43.3 343.9 2010.6871 240.4 1.407 16923 HO 303AB 112.6 1958.38 0.609 4.1 185.5 1.031 DOCOBO 23409+2022 3.1972 1.112 89.0 58.3 2009.687 185.6 1.008 & LING - RST4136AB 53.81 1999.31 0.038 17.1 205.4 0.171 DOCOBO & 23586-1408 6.6902 0.205 102.5 63.5 2009.671 203.5 0.183 CAMPO 17149 STF3050AB 717. 1992.3 0.215 185.2 336.9 2.278 HARTKOPF 23595+3343 0.5021 3.856 61.9 116.4 2009.8430 337.6 2.301 & MASON ========================================================================================== NEW LINEAR FITS ADS Name X0 Xa rho_0 T0 2011 Author RA 2000 DEC - Y0 Ya theta_0 Last ob. 2012 ---------------------------------------------------------------------------------------- 337 HJ 621 -2.322987 0.049777 3.120 1955.128 5.1 5.205 CVETKOVIC 00251+1824 - -2.083223 -0.055505 311.89 2010.6844 5.5 5.265 - BU 787 AB -1.744095 -0.020860 2.258 1878.073 292.0 4.872 CVETKOVIC 03342+4837 - 1.467897 -0.024785 229.91 2010.6900 292.2 4.901 17130 HJ 995 3.715886 0.042847 4.043 1948.823 125.9 7.877 CVETKOVIC 23581+2840 - -1.593434 0.099919 66.79 2010.6900 126.3 7.970 ========================================================================================== INFORMATIVE NOTE In the Binaries Workshop held in Santiago de Compostela in February 2011, Drs. Scardia and Prieur (as representatives of the PISCO group) presented a request to the IAU Commission 26 with the intention that it would be sent to the Cote d'Azur Observatory (OCA), asking for necessary support for their group in terms of obtaining automatic speckle measurements with a dedicated computer-controlled 1 meter telescope that belongs to OCA. The Commission 26 staff (8 people) approved the proposal by a majority vote. The Director of the OCA responded that he would make all of the arrangements necessary in order to be able to satisfy IAU recommendations. J. A. Docobo President IAU Commission 26 ****************************************************************************************** The deadline for contributions to Information Circular No. 175 is: October 15th 2011 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN http://www.usc.es/astro ISSN: 1024-7769

INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS) INFORMATION CIRCULAR No. 175 (OCTOBER 2011) NEW ORBITS ADS Name P (yr) T e W(2000) 2011 Author RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2012 ---------------------------------------------------------------------------------------- - COU 247 160.0 2002.05 0.256 19.2 246.4 0.330 DOCOBO & 00095+1907 2.2500 0.573 129.4 86.1 2010.635 242.4 0.342 TAMAZIAN - HDS 169 143.73 2115.16 0.575 102.7 238.4 0.625 HARTKOPF 01166+1831 2.5048 0.767 118.3 93.9 2010.8971 236.9 0.622 & MASON - HDS 272 138.54 2074.75 0.513 89.6 334.5 0.573 HARTKOPF 02022-2402 2.5985 0.970 111.1 274.2 2010.9655 332.2 0.582 & MASON - RST2272 549.83 2050.09 0.671 252.9 235.7 1.445 HARTKOPF 02039-4525 0.6548 3.233 74.2 54.2 2011.0393 236.3 1.450 & MASON - HDS 357 78.70 2041.99 0.401 160.8 60.0 0.330 HARTKOPF 02456-7114 4.5744 0.545 116.1 256.6 2010.9656 55.0 0.332 & MASON 2111 BU 83 716.26 2418.03 0.510 147.7 13.6 0.955 HARTKOPF 02460-0457 0.5026 2.380 101.4 290.2 2010.9655 13.1 0.963 & MASON - B 1474 102.78 1953.13 0.050 121.6 278.7 0.301 HARTKOPF 04502-3113 3.5025 0.289 14.9 315.7 2010.9657 281.8 0.301 & MASON - RST2375 278.90 2003.66 0.441 150.5 22.0 0.159 HARTKOPF 05190-2159 1.2908 0.463 60.0 221.7 2010.9659 27.1 0.153 & MASON - DAW 85 65.52 1999.56 0.788 125.2 310.1 0.349 HARTKOPF 05330-2415 5.4943 0.286 168.1 24.0 2010.9659 308.0 0.365 & MASON - HU 1568 307.49 2021.62 0.391 171.3 151.9 0.472 HARTKOPF 05418-5000 1.1708 1.025 109.5 76.7 2010.9795 150.1 0.450 & MASON - FIN 19Aa,Ab 28.77 1993.25 0.436 157.7 353.4 0.260 HARTKOPF 06359-3605 12.5130 0.309 101.8 287.1 2010.9659 350.4 0.284 & MASON - FIN 322 58.18 1968.78 0.282 241.0 281.0 0.089 HARTKOPF 06493-0216 6.1872 0.145 113.2 62.9 2010.9659 275.3 0.095 & MASON - I 1070AB 3255.23 2018.39 0.950 205.6 26.5 0.137 HARTKOPF 07598-4718 0.1106 1.777 65.6 257.0 2010.9685 29.1 0.126 & MASON 6981 AG 154 1162.85 3009.92 0.643 183.8 1.0 2.657 HARTKOPF 08369+2315 0.3096 3.124 95.1 81.0 2010.9688 1.0 2.660 & MASON - RST2593 159.72 2061.33 0.215 190.1 337.9 0.950 HARTKOPF 08563-3707 2.2540 0.914 143.3 351.6 2011.0370 336.3 0.939 & MASON 7662 A 2145 80.59 1991.25 0.812 160.7 244.2 0.170 MASON & 10093+2020 4.4669 0.152 139.5 113.7 1995.1438 242.7 0.175 HARTKOPF - RST4454AB 164.55 1957.19 0.306 221.3 222.8 0.294 HARTKOPF 10183-0326 2.1878 0.273 86.9 243.1 2010.9689 222.9 0.292 & MASON 8128 STF1527 551.36 2010.22 0.881 184.3 196.0 0.307 SCARDIA 11190+1416 0.6529 2.624 53.9 2.6 2010.395 209.7 0.296 ET AL. (*) - FIN 54 347.86 2245.05 0.716 119.6 207.2 0.252 HARTKOPF 13072-5420 1.0349 0.670 119.6 106.2 2011.0400 205.9 0.253 & MASON 8914 STT 266 1954.11 1852.79 0.502 166.4 357.0 2.003 HARTKOPF 13284+1543 0.1842 3.384 72.8 132.1 2011.0374 357.2 2.002 & MASON - B 2036AB 227.78 1985.94 0.567 7 181.2 1.3 0.357 HARTKOPF 15313-3349 1.5805 0.444 90.9 67.0 2011.3029 1.3 0.366 & MASON - COU 612 63.09 2035.01 0.401 155.9 173.8 0.289 DOCOBO 15390+2545 5.7061 0.223 138.8 136.1 2009.4413 171.5 0.288 & LING - MCA 42CE 38.77 1993.96 0.025 5.4 328.8 0.112 DOCOBO 16054-1948 9.2855 0.124 41.8 155.8 2009.263 336.9 0.117 & CAMPO - FIN 354 50.16 2014.57 0.093 82.9 262.7 0.112 DOCOBO & 16115+0943 7.1770 0.122 92.2 214.7 2009.263 262.4 0.109 ANDRADE - CHR 54 35.67 2011.21 0.774 56.4 282.7 0.011 LING 16229-1701 10.0925 0.185 100.6 125.5 2010.4784 232.5 0.058 10385 HU 169 79.14 1992.09 0.458 22.1 191.9 0.245 DOCOBO 17115-1630 4.5489 0.217 125.5 63.0 2008.5397 190.1 0.248 & LING 11127 BU 132AB 3021.10 1936.97 0.599 192.0 188.2 1.393 HARTKOPF 18112-1951 0.1192 3.182 116.1 327.5 2011.2893 188.0 1.394 & MASON 14526 MCA 65Aa,Ab 161.5 2024.3 0.261 205.2 354.3 0.156 MASON 20598+4731 2.2296 0.208 145.8 265.5 2008.4509 351.1 0.153 (*) SCARDIA, PRIEUR, PANSECCHI & ARGYLE ========================================================================================== NEW LINEAR FITS Authors: FRIEDMAN, E.A., MASON, B.D. & HARTKOPF, W.I. ADS Name X0 Xa rho_0 T0 2011 RA 2000 DEC - Y0 Ya theta_0 Last ob. 2012 ---------------------------------------------------------------------------------------- 17175 BU 733AD -30.970873 -0.859028 41.335 1842.9500 307.7 220.590 00022+2705 - 27.374418 -0.971887 228.53 1998.7500 307.8 221.864 - I 438BC 0.450788 -0.070674 1.333 1898.1310 241.2 8.506 00276-3157 - 1.254735 0.025391 160.24 1998.7500 241.3 8.580 - ENG 7 -15.407104 -0.593044 40.548 2039.2070 177.5 44.663 01477+6351 - 37.507088 -0.243610 202.33 2003.8700 178.3 44.398 - ENG 9AB 11.881812 -0.240921 14.453 2216.4419 135.9 88.548 01591+3313 - -8.228194 -0.347899 55.30 2002.7040 135.9 88.131 2383 H 5 117AC -12.157592 -0.061803 13.730 1867.1040 296.5 23.446 03112+2225 - 6.380237 -0.117765 242.31 2010.6200 296.7 23.554 - HJ 2194 -2.341482 0.055625 7.230 1438.3190 121.0 34.380 03314+0131 - 6.840384 0.019041 198.90 2003.0740 121.0 34.438 3093 STF 518AD 29.253775 2.264239 35.189 1881.2720 37.6 525.612 04153-0739 - 19.557575 -3.386797 123.76 1998.8700 37.6 529.677 3093 STF 518AE -74.164978 2.239836 88.650 1861.0400 24.9 615.479 04153-0739 - -48.562584 -3.420686 303.22 1998.8700 25.0 619.526 - HJ 351AB 7.571932 0.046198 10.333 1788.3190 77.4 18.256 04550+3411 - 7.031074 -0.049752 132.88 2004.0900 77.2 18.312 3886 STFB 3AC -26.616661 -0.523136 33.911 1905.3170 300.7 94.665 05191+4006 - 21.011721 -0.662684 231.71 1999.9900 300.9 95.453 - BLL 16 37.474773 -0.489587 52.680 2081.6970 88.8 72.592 05460+3717 - -37.024433 -0.495542 45.35 2007.2679 88.4 72.115 - STF 892 32.207527 -0.009910 34.064 1355.9041 40.7 39.454 06195+1220 - -11.092638 -0.028773 71.00 2007.0649 40.7 39.469 - HJ 388 -4.513659 0.034228 8.191 1416.6219 142.0 25.681 06269+2951 - 6.834824 0.022604 213.44 2005.2440 142.0 25.719 - KUI 51AC 12.936215 -0.287673 14.038 1961.1350 358.3 38.819 10365-1214 - -5.452597 -0.682500 67.14 2007.2050 358.0 39.511 - STI 714 -1.688840 0.022737 2.440 1641.1420 34.3 11.872 10456+6250 - -1.761501 -0.021799 316.21 2000.2610 34.4 11.903 8250 STF1561AE -0.179783 0.559438 57.382 2056.2759 335.5 62.951 11387+4507 - -57.381424 -0.001753 359.82 2009.4840 336.0 62.723 8250 STF1561BC -0.001742 0.584671 3.973 1707.5031 88.7 176.906 11387+4507 - -3.973470 -0.000256 359.97 2009.4840 88.7 177.490 - STT 576AB -6.484517 -0.737788 19.883 1593.9280 285.5 325.336 11507+0146 - 18.796144 -0.254531 199.03 1984.3000 285.5 326.115 - STT 578 -61.849041 0.810116 83.229 1935.2770 180.6 122.925 13119+2753 - 55.693901 0.899648 228.00 1924.2500 180.2 123.819 8841 BU 800AC 33.207432 -0.640518 86.861 1878.7070 336.1 125.807 13169+1701 - -80.262177 -0.265006 22.48 1999.9500 335.9 126.309 9212 BU 1246AC 19.498384 0.344018 26.951 1842.7540 118.4 87.592 14190-2549 - -18.605721 0.360523 46.34 1999.2200 118.5 88.066 - STF1845 3.969837 -0.080821 7.667 1548.0780 311.1 44.306 14237+6156 - -6.559544 -0.048913 31.18 2007.4449 311.1 44.399 9413 STF1888AD -18.767683 -0.420808 37.684 1686.9120 286.4 161.251 14514+1906 - 32.677612 -0.241682 209.87 2008.3110 286.4 161.723 - SKF 10 -8.517613 0.102674 9.797 2052.5930 282.5 13.203 15111+4424 - 4.840978 0.180653 240.39 2007.5179 281.8 13.064 - POU3216 -6.438280 -0.044088 7.687 1866.0560 293.4 13.929 16134+2431 - 4.199899 -0.067585 236.88 2003.3300 293.6 13.996 - STF2042 -0.462005 -0.106478 5.835 2090.4360 128.7 10.386 16258+0542 - 5.816632 -0.008457 184.54 2007.4399 129.1 10.298 - POU3231 -8.353945 -0.013474 8.433 1802.9120 210.3 22.108 16316+2307 - -1.151351 0.097761 277.85 2003.4700 210.2 22.199 - POU3246 1.025265 0.007408 1.041 1621.9200 166.4 16.528 16489+2259 - -0.181470 0.041853 79.96 2003.3300 166.4 16.570 10417 SHJ 243BD -179.122208 0.545681 192.190 1848.6230 342.9 309.786 17153-2636 - -69.658478 -1.403182 291.25 1987.6520 343.1 310.968 12913 STF2580AC 86.616745 -0.022163 86.723 2158.6089 124.6 109.270 19464+3344 - -4.296807 -0.446765 87.16 2009.4850 124.4 108.998 - BUP 202AD -41.656883 0.400098 58.158 1898.0229 2.1 86.627 20041+1704 - -40.583622 -0.410679 314.25 2009.6331 2.3 87.053 - HZG 15AD -20.516668 0.416876 29.713 2047.6370 259.8 36.788 20111+1611 - 21.492411 0.397951 223.67 2008.7780 259.1 36.451 - POU4348AB 9.232443 -0.011024 9.241 1907.6270 162.8 27.480 20182+2319 - 0.402985 0.252557 92.50 2008.8820 163.0 27.718 14585 BU 1138CE -0.019011 -0.386340 0.051 1949.2830 248.1 25.300 21028+4551 - -0.047053 0.156096 338.00 1962.7600 248.1 25.716 15275 STF2822AC -17.962929 -0.275661 27.131 1815.8290 290.7 76.401 21441+2845 - 20.332838 -0.243531 221.46 1999.8600 290.8 76.745 15797 BU 377AC -3.864764 -0.210705 12.191 2156.9790 51.0 34.855 22159+5440 - -11.562686 0.070427 341.52 2006.8890 50.9 34.647 15797 BU 377AD 7.414804 -0.213434 22.305 2010.6930 160.2 22.306 22159+5440 - 21.036974 0.075228 160.58 2006.8890 160.8 22.306 16261 HJ 301AC 83.832207 -0.230352 92.418 1719.7350 5.3 183.781 22467+1210 - -38.899464 -0.496432 65.11 1924.9010 5.2 184.255 16633 BU 1220AD 0.086581 -0.353315 3.452 1697.6479 273.2 110.447 23159-0905 - -3.451173 -0.008864 1.44 2008.8330 273.2 110.801 - BUP 240AB -20.662453 -0.375194 27.708 1796.3800 305.3 123.447 23399+0538 - 18.460800 -0.419940 228.22 2008.8820 305.3 123.995 ========================================================================================== NEW LINEAR FITS (cont.) Author: CVETKOVIC, Z ADS Name X0 Xa rho_0 T0 2011 RA 2000 DEC - Y0 Ya theta_0 Last ob. 2012 ---------------------------------------------------------------------------------------- 48 STT 547AD -14.463919 -0.871063 83.311 1936.073 228.5 106.46 00057+4549 - 82.046331 -0.153559 190.00 2011.6356 228.9 107.01 48 POP 217AP 1.726719 -0.888654 9.562 2002.921 333.0 12.03 00057+4549 - -9.405213 -0.163150 10.40 2011.6356 329.8 12.60 ========================================================================================== ANNOUNCEMENTS * Preliminary planning is underway for a possible IAU Symposium in September/October 2013 focusing on resolved spectroscopic binaries which would be jointly sponsored by Commissions 26, 30 and 54 hosted at the Special Astrophysical Observatory. For those interested in logistical details please see http://agora.guru.ru/display.php?conf=lot&l=1 for an example of a Fall 2011 meeting. At this time we are polling possible interest in this meeting. Please reply with a "would attend", "may attend" or "would not attend" to wds@usno.navy.mil. Thanks! Brian Mason Dimitri Pourbaix Gerard van Belle * The Proceedings of the "International Workshop on Double and Multiple Stars: Dynamics, Physics, and Instrumentation", held in Santiago de Compostela on December 10 and 11, 2009, are now available at the following reference: "2011/ AIP CONFERENCE PROCEEDINGS - 1346" Editors: J. A. Docobo, V. S. Tamazian, and Y. Y. Balega J. A. Docobo ****************************************************************************************** The deadline for contributions to Information Circular No. 176 is: February 15th 2012 J. A. Docobo (joseangel.docobo@usc.es) J. F. Ling (josefinaf.ling@usc.es) Tel: +34 981592747 Fax: +34 981597054 Observatorio Astronomico "R. M. Aller" P. O. Box 197 Universidade de Santiago de Compostela SPAIN ISSN: 1024-7769