Note: USNO-A1.0 contains 488,006,860 sources, and was compiled from the blue/red overlaps of the detection lists generated from scans of POSS-I O and E plates (>=-30°) and SRC-J and ESO-R plates (<=-35°). USNO-A1.0 was created by Dave Monet () and collaborators at Flagstaff Station, U.S. Naval Observatory; it is superseded by the new PMM-USNO-A2.0 version.
The VizieR search engine uses an on-line compressed version (3.4Gbytes) which was generated at CDS.

I/243/out Post annotation

The PMM USNO-A1.0 Catalogue (Monet 1997) ReadMe+ftp metaI/243/out The Full Catalogue (488006860 rows) (Note)

Full	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	USNO-A1.0	RA(ICRS) deg	DE(ICRS) deg	GSCflag	Mflag	Bmag mag	Rmag mag	Epoch yr
1	06 35 18.29352	+05 33 06.2928	06 32 38.10317	+05 35 34.2427	206.15276947	-1.04227370	0900-03155857	98.826223	5.551748	G		12.7	12.7	1953.940