Note: USNO-A2.0 contains 526,280,881 sources, and is based on a re-reduction of the Precision Measuring Machine (PMM) scans from POSS-I O and E plates (>=-18°) and SRC-J and ESO-R plates (<=-20°). USNO-A2.0 was created by Dave Monet () and collaborators at Flagstaff Station, U.S. Naval Observatory.
The major difference between USNO-A2.0 and its previous version USNO-A1.0 is that A1.0 used the Guide Star Catalog as its reference frame whereas A2.0 uses the ICRF as realized by the USNO ACT catalog (Urban et al. 1997). The VizieR search engine uses an on-line compressed version (3.6Gbytes) which was generated at CDS.

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	USNO-A2.0	RAJ2000 deg	DEJ2000 deg	ACTflag	Mflag	Bmag mag	Rmag mag	Epoch yr
1	4.482	14 44 44.06016	+16 15 49.9032	1050-07276530	221.183584	+16.263862			16.0	13.7	1950.205
2	29.510	14 44 45.19608	+16 16 10.5132	1050-07276647	221.188317	+16.269587			18.0	16.7	1950.205

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	APM-ID	RAJ2000 deg	DEJ2000 deg	rmag mag	l_	rClass	rStel	rDiam arcsec	rEll	bmag mag	l_	bClass	bStel	bDiam arcsec	b-r mag	Mflag
1	4.112	14 44 44.03472	+16 15 49.8312	EO0054-0299209	221.183478	+16.263842	14.20		-1	0.07	14.0	0.05	16.66		-1	-0.12	10.9	2.47
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%204.112&%3cFONT%20COLOR=%27#CD5B45%27>14%2044%2044.03472&%3cFONT%20COLOR=%27#CD5B45%27>%2b16%2015%2049.8312&EO0054-0299209&221.183478&%2b16.263842&14.20&%20&-1&%20%20%200.07&%20%2014.0&%200.05&16.66&%20&-1&%20%20-0.12&%20%2010.9&%20%202.47&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6640319b3e268d&-out.add=.&-source=I/267/out&APM-ID===EO0054-0298523&-out.orig=o' class='full'229.18614 44 45.16272+16 16 10.5312EO0054-0298523221.188178+16.26959216.61  -1 -1.83 9.0 0.0318.59  -1 0.36 7.9 1.98   %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20construction%20of%20the%20%0a%3cB%3eGSC-II%20%0ais%20still%20in%20progress:%20this%0aversion%20has%20no%20proper%20motions,%20and%20the%20magnitude%20limits%20are%2018.5%20in%20F%20%28red%29%0aand%2019.5%20in%20J%20%28blue%29.%20The%20data%20are%20%3cB%3e%3cFONT%20COLOR=%27#0000CD%27>copyrighted,%20check%20%0athe%20%3cB%3edata%20use%20Policy.%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.2	RA(ICRS) deg	DE(ICRS) deg	Epoch yr	Rmag mag	e_ mag	Bjmag mag	e_ mag	Class	a pix	e
1	2.357	14 44 43.91184	+16 15 49.9212	N13131227504	221.182966	+16.263867	1993.362	13.93	0.26	15.98	0.27	0	4.76	0.03
2	29.420	14 44 45.16848	+16 16 10.7760	N13131227537	221.188202	+16.269660	1993.362	16.59	0.27	18.28	0.27	0	3.29	0.07

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	ID	RAJ2000 "h:m:s"	DEJ2000 "d:m:s"	Vmag mag	o_RAs	o_DEs
1	2.214	14 44 43.900133	+16 15 50.06100	7AH1398	14 44 43.9001	+16 15 50.061	15.103	8	7

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