Star Catalogs


Information on Y2K compliance of USNO Products is available here.


Star catalogs provided here fall into several categories, as follows:

  1. those produced from observations made at the U.S. Naval Observatory
    Archives
    catalogs of the 6-inch transit circle
    W1J00 [W650]
    the results of the program of observations made with the 6-inch transit circle from
    W2J00 and B1J00
    the results of the program (the International Reference Stars) of observations made with the 6-inch transit circle from 1985-1995 in Washington, DC and the results of the program of observations made with the 7-inch transit circle from 1986-1996 at Black Birch, New Zealand.
    Twin Astrograph Catalog (TAC)
    a new catalog of over 700,000 positions to Mb=11.5
    USNO CCD Astrograph Catalog (UCAC)
    observations and reductions currently underway using the 8" astrograph at Cerro Tololo, Chile

  2. those produced from either re-measurement or re-analysis of data taken elsewhere
    Washington Double Star Catalog
    the compilation of observations of multiple star observations made worldwide, including at USNO
    CPC2
    The second release of the CPC2 data (Second Cape Photographic Catalogue). This release 2 is based on a complete new plate-by-plate reduction using the Hipparcos Catalogue.
    Astrographic Catalogue (AC 2000)
    the re-analysis of the published measurements of the AC zones
    The ACT Reference Catalog
    the combination of the AC 2000 and Tycho Catalogues for improved proper motions of 988,758 stars
  3. those produced elsewhere, but provided here for convenience
    The following catalogs are available: FK5, PPM, IRS, Yale Parallax
    see the page of recommended star catalogs.

Back to Astrometry Department Home Page

Send comments on this page and those below it to gsh@usno.navy.mil - This page was last updated on 30 Nomveber 2000

Back to USNO Home Page