Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353l..45t&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 353, April 20, 1990, p. L45-L48.
Astronomy and Astrophysics
Astronomy
53
Astrometry, Astronomical Catalogs, Hubble Space Telescope, Sky Surveys (Astronomy), Photographic Plates, Schmidt Telescopes, Stellar Color, Stellar Magnitude
Scientific paper
The first version of the Hubble Space Telescope Guide Star Catalog has been completed and released. Consideration is given to the principal aspects of the Guide Star Catalog positional system, its systematic errors (which occur relative to a plate-based coordinate system), its north-south discontinuity, and its steep magnitude dependence for stars brighter than V less than 9 mag. Positional errors (i.e., accuracy) from plate center to edge vary from 0.5 to 1.1 arcsec in the northern celestial hemisphere and from 1.0 to 1.6 arcsec in the southern celestial hemisphere. Between V = 6 mag and V = 10 mag the positional errors decrease from 1.2 (1.9) arcsec in the north (south) to 0.6 (1.1) arcsec. Relative errors for a single star range (at 30 arcmin separation) from 0.33 to 0.76 arcsec depending upon hemisphere and magnitude.
Bucciarelli Beatrice
Gilmozzi Robert
Jenkner Helmut
Laidler Victoria G.
Lasker Barry M.
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