The 3 columns in color are computed by VizieR, and are not part of the original data.

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	20.012	21 15 51.48480	-00 07 37.5132	0825-19104208	318.964520	-00.127087			17.4	17.0	1952.645

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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	10.522	21 15 50.78688	-00 07 28.9704	EO0575-0245844	318.961612	-00.124714	19.03		1	3.93	6.4	0.41	21.21		-1	1.83	5.4	2.18
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>10.522&%3cFONT%20COLOR=%27#CD5B45%27>21%2015%2050.78688&%3cFONT%20COLOR=%27#CD5B45%27>-00%2007%2028.9704&EO0575-0245844&318.961612&-00.124714&19.03&%20&%201&%20%20%203.93&%20%20%206.4&%200.41&21.21&%20&-1&%20%20%201.83&%20%20%205.4&%20%202.18&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66377d6f288992&-out.add=.&-source=I/267/out&APM-ID===EO0575-0246027&-out.orig=o' class='full'220.24421 15 51.52080-00 07 37.5420EO0575-0246027318.964670-00.12709517.48   1 15.99 11.6 0.4018.59   1 13.84 14.3 1.11   322.32021 15 51.06888-00 07 41.2032EO0575-0246101318.962787-00.12811219.99  -1 -0.63 2.9 0.0821.83L 0     1.84   425.83821 15 49.78344-00 07 00.5124EO0575-0245230318.957431-00.11680919.46   1 2.29 5.1 0.3621.83L 0     2.37   %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	20.525	21 15 51.48984	-00 07 38.0352	S321002114868	318.964541	-00.127232	1991.538	16.05	0.36	16.97	0.36	3	7.79	0.53

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eUSNO-B%20Catalog%20presents%20positions,%20proper%20motions,%20%0amagnitudes%20un%20blue,%20red%20and%20infrared,%20as%20well%20as%20star/galaxy%20estimators%0afor%201,045,175,762%20objects%20derived%20from%203,648,832,040%20separate%20observations.%0aThe%20data%20were%20taken%20from%20scans%20of%207,435%20Schmidt%20plates%0ataken%20from%20various%20sky%20surveys%20during%20the%20last%2050%20years.%3cBR%3e%0aUSNO-B1.0%20catalog%20was%20created%20by%20Dave%20Monet%20and%20collaborators%0aat%20http://www.nofs.navy.mil/data/fchpix/%20%3cBR%3e%0a%3cB%3e%3cFONT%20COLOR=%27#EE0000%27>%20Note%20that%20the%20star/galaxy%20estimators%20may%20be%20mixed%20up%0a%20in%20dense%20regions.%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	USNO-B1.0	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 mas	e_DEJ2000 mas	Epoch yr	pmRA mas/yr	pmDE mas/yr	Ndet	B1mag mag	R1mag mag	B2mag mag	R2mag mag	Imag mag
1	11.104	21 15 50.79216	-00 07 29.6004	0898-0597817	318.961634	-00.124889	159	93	1978.2	10	-14	3		19.28	20.58	19.46
2	20.259	21 15 51.49800	-00 07 37.7004	0898-0597823	318.964575	-00.127139	193	57	1975.0	0	0	5	17.68	16.73	15.57	15.77	17.13
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>20.259&%3cFONT%20COLOR=%27#CD5B45%27>21%2015%2051.49800&%3cFONT%20COLOR=%27#CD5B45%27>-00%2007%2037.7004&0898-0597823&318.964575&-00.127139&193&%2057&1975.0&%20%20%20%20%200&%20%20%20%20%200&5&17.68&16.73&15.57&15.77&17.13%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66377d6f288992&-out.add=.&-source=I/284/out&USNO-B1.0===0898-0597821&-out.orig=o' class='full'321.24821 15 51.10680-00 07 40.09080898-0597821318.962945-00.1278033171961978.2 12 223  19.6820.1818.16   425.81021 15 49.77288-00 07 00.71040898-0597807318.957387-00.1168641871581980.6 0 04  19.4620.9819.3718.66 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20Naval%20Observatory%20Merged%20Astrometric%20Dataset%20%28NOMAD%29%20contains%0aastrometric%20and%20photometric%20data%20for%20over%201%20billion%20stars%20derived%20from%0athe%20Hipparcos%20%28I/239%29,%20Tycho-2%20%28I/259%29,%20UCAC2%20%28I/289%29,%20and%20USNO-B1.0%0a%28I/284%29%20catalogs%20for%20astrometry%20and%20optical%20photometry,%20supplemented%0aby%202MASS%20%28II/246%29%20near-infrared%20photometry.%3cBR%3e%0a%3cFONT%20SIZE=%27-1%27%3eAn%20efficient%20remote%20query%20program%20%3cB%3efindnomad1%20is%0aavailable%20in%20the%20cdsclient%20%0apackage,%20for%20Unix/Linux%20platforms%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	NOMAD1	YM	RAJ2000 deg	DEJ2000 deg	r	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Bmag mag	r_	Vmag mag	r_	Rmag mag	r_	Jmag mag	Hmag mag	Kmag mag	R
1	11.104	21 15 50.791992	-00 07 29.60004	0898-0650830	..	318.9616333	-00.1248889	B	10.0	5.0	-14.0	3.0	20.580	B			19.460	B
2	20.259	21 15 51.498000	-00 07 37.70004	0898-0650836	Y.	318.9645750	-00.1271389	B	0.0	0.0	0.0	0.0	17.840	Y			15.770	B
3	21.247	21 15 51.106656	-00 07 40.09008	0898-0650834	..	318.9629444	-00.1278028	B	12.0	11.0	22.0	6.0	20.180	B			18.160	B
4	25.812	21 15 49.772664	-00 07 00.71004	0898-0650820	..	318.9573861	-00.1168639	B	0.0	0.0	0.0	0.0	20.980	B			19.370	B

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20This%20version%20of%20the%20%0a%3cB%3eGSC-II%0ahas%20no%20proper%20motions,%20but%20the%20limits%20on%20brightness%20which%20existed%20on%0a%20%28F<18.5,%20B_j<19.5%29%20were%20removed.%0a%25The%20data%20are%20%3cB%3e%3cFONT%20COLOR=%27#0000CD%27>copyrighted,%20check%0a%25the%20%3cB%3edata%20use%20Policy.%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 [****ClosingBrace(s)Inserted****]
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%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_RAJ2000

%22>%5cFONT SIZE=-1"h:m:s" _DEJ2000
"d:m:s"GSC2.3

RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

111.09921 15 50.78088-00 07 29.5464SB9L014877318.961587-00.1248741991.53819.2320.52    3 1.91 0.06 220.52021 15 51.49008-00 07 38.0280SB9L014868318.964542-00.1272301991.53816.0516.97  17.393 7.79 0.53 325.82521 15 49.77720-00 07 00.6240SB9L014931318.957405-00.1168401991.53819.47    18.323 1.99 0.13 %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	pmRA mas/yr	pmDE mas/yr	Jmag mag	Kmag mag	b1mag mag	b2mag mag	r1mag mag	r2mag mag	imag mag	No	fl
1	11.212	21 15 50.79024	-00 07 29.7048	318.961626	-00.124918	12.3	-17.0				20.58	19.28	19.46		3	0
2	20.412	21 15 51.50256	-00 07 37.8372	318.964594	-00.127177	9.7	-5.1			17.68	15.57	16.73	15.77	17.13	5	0
3	21.293	21 15 51.09984	-00 07 40.1448	318.962916	-00.127818	12.8	20.1				20.18	19.68	18.16		3	0
4	25.749	21 15 49.77120	-00 07 00.8220	318.957380	-00.116895	5.4	-6.5				20.98	19.46	19.37	18.66	4	0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 (...)	e_DEJ2000 arcsec	[****ClosingBrace(s)Inserted****]
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arcsec&%">\BegDIVclass='sort-down ' </A>decmagBJ
mage_
magmagRF
mage_
magmagG
mage_
magmagGrvs
mage_
magalphaEpoch
yrdeltaEpoch
yrpmRA
mas/yre_
(...)pmDE
mas/yre_
(...) 111.10321 15 50.78768-00 07 29.5803318.961615-00.124883 0.005 0.00520.522 0.30019.227 0.30019.420 0.08418.254 0.1132003.81002003.8100 12.3 7.3 -17.0 7.3 220.22121 15 51.46540-00 07 37.8496318.964439-00.127180 0.018 0.02416.965 0.30016.045 0.30017.664 0.08216.709 0.1112003.81002003.8100 9.7 5.6 -5.1 5.6 321.12821 15 51.80803-00 07 36.1420318.965867-00.126706 0.075 0.07120.197 0.20220.374 0.20819.740 0.10519.101 0.1302003.81002003.8100 0.0 0.0 0.0   425.89221 15 49.77070-00 07 00.6262318.957378-00.116841 0.007 0.00720.980 0.40019.465 0.30019.513 0.09117.853 0.1182003.81002003.8100 5.4 7.1 -6.5 7.1 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAICRS deg	e_ mas	DEICRS deg	e_ mas	ID	Type	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Nobs	Dt yr	Rmag mag	Bmag mag	Nmag mag	Vmag mag	Jmag mag	Hmag mag	Kmag mag
1	11.162	21 15 50.790539	-00 07 29.65410	318.9616272	103.00	-00.1249039	42.00	47369+0014877	4	7.0	3.5	-9.3	1.5	6	38.892	19.227	20.522
2	20.366	21 15 51.514406	-00 07 37.71511	318.9646434	129.00	-00.1271431	78.00	47369+0014868	4	4.7	4.7	2.6	2.8	7	38.892	16.045	16.965	17.390

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RA_ICRS deg	e_ mas	DE_ICRS deg	e_ mas	Source	Plx mas	[****ClosingBrace(s)Inserted****]
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mas&%">\BegDIVclass='sort-down ' </A>decpmRA
mas/yrpmDE
mas/yrRADEcor

Dup

<FG>
e-/se_
e-/s<Gmag>
magVar

125.75821 15 49.770053662-00 07 00.82740911318.957375223625.118-00.116896502513.5202689532538213001472      -0.7370 2.6377e+02 3.6666e+0019.472NOT_AVAILABLE %0a%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	ipix	comp	pmRA mas/yr	pmDE mas/yr	Jmag mag	Hmag mag	Kmag mag	B1mag mag	B2mag mag	R1mag mag	R2mag mag	Imag mag	GaiaId	Gmag mag	Clone	Nosc
1	25.834	21 15 49.767075960	-00 07 00.76328472	318.9573628165	-00.1168786902	1349580784163460785		3.034	-4.290					20.98	19.46	19.37	18.66	2689532538213001472	19.472

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