Growing Astronomical Catalogs

• 1989 HST Guide Star Catalog 25,541,952 sources

• 1996 USNO-A1.0 Catalog 488,006,860 sources

• 1998 USNO-A2.0 Catalog 526,280,881 sources

• 2001 GSC II Catalog (2.2.01) 998,402,801 sources

• 2002 USNO-B1.0 Catalog 1,036,366,767 sources

• 2003 2MASS Point Source Catalog 470,992,970 sources

• 2003 USNO UCAC2 Catalog 48,366,996 sources