A series of star catalogues covering the whole sky, obtained from measurements of photographs taken with normal astrographs at many observatories between about 1890 and 1950. It was published in 21 sections, each covering a zone of declination measured from a particular observatory, between 1902 and 1963. The general limiting magnitude is about 11 (photographic), but some observatories measured fainter stars. In 1997 the US Naval Observatory published the AC 2000 catalogue, containing 4 621 836 stars measured as part of the original Astrographic Catalogue project but with their positions converted to the same reference frame as the modern HipparcosCatalogue. A revised version, AC 2000.2, was released in 2001, incorporating photometry for 2.4 million stars from the *Tycho-2catalogue.
http://cdsarc.u-strasbg.fr/viz-bin/Cat?I/275 Detailed description and full catalogue downloadable from the CDS.
Subjects: Astronomy and Astrophysics.