Astron. Astrophys. Suppl. Ser. 141, 423-431
The U.S. Naval Observatory pole-to-pole catalog: W2
T.J. Rafferty - E.R. Holdenried
Send offprint request: T.J. Rafferty
United States Naval Observatory, 3450 Massachusetts Ave., NW, Washington, DC 20392-5420, U.S.A.
Received September 22; accepted November 10, 1999
The original objective was to form a traditional, all-sky catalog of absolute star positions which could be firmly linked to the dynamical system. However, with the success of the Hipparcos project and the adoption of the ICRF as the celestial reference frame, the primary focus of the pole-to-pole program changed. The stellar positions have been differentially reduced to the system of Hipparcos and these were used to tie the planetary observations into the ICRF. Thus the program has resulted in a body of high quality observational data (average standard deviation of a mean position of about 75 mas) that will provide important input for the production of ICRF-based ephemerides. This is particularly true for the outer and minor planets.
Key words: catalogs -- astrometry