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	1.514	12 51 53.09616	+49 32 16.1808	1350-08178137	192.971234	+49.537828			16.3	16.8	1955.210
2	7.675	12 51 53.38272	+49 32 10.5900	1350-08178152	192.972428	+49.536275			18.2	18.1	1955.210

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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	2.523	12 51 53.14488	+49 32 15.2412	EO1408-0020285	192.971437	+49.537567	17.12		1	14.60	16.4	0.48	17.27		1	27.71	18.5	0.15
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%202.523&%3cFONT%20COLOR=%27#CD5B45%27>12%2051%2053.14488&%3cFONT%20COLOR=%27#CD5B45%27>%2b49%2032%2015.2412&EO1408-0020285&192.971437&%2b49.537567&17.12&%20&%201&%20%2014.60&%20%2016.4&%200.48&17.27&%20&%201&%20%2027.71&%20%2018.5&%20%200.15&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663c9a176910&-out.add=.&-source=I/267/out&APM-ID===EO1350-0030281&-out.orig=o' class='full'2 2.94912 51 53.19408+49 32 15.1008EO1350-0030281192.971642+49.53752816.38   2 35.77 15.2 0.5315.84   2 40.85 18.8 -0.54   3 7.71012 51 52.99080+49 32 24.9000EO1408-0020193192.970795+49.54025019.69   1 4.19 6.3 0.6021.87L 0     2.18   %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	1.383	12 51 53.09112	+49 32 16.3248	N13002126252	192.971213	+49.537868	1991.280	14.74	0.00	15.91	0.38	3	4.97	0.38
2	7.904	12 51 53.33928	+49 32 10.1004	N13002126253	192.972247	+49.536139	1991.280	16.32	0.00			0	3.33	0.24

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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	1.127	12 51 53.09472	+49 32 17.0232	1395-0231602	192.971228	+49.538062	28	355	1967.2	2	16	3	17.20	17.23			17.61
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%201.127&%3cFONT%20COLOR=%27#CD5B45%27>12%2051%2053.09472&%3cFONT%20COLOR=%27#CD5B45%27>%2b49%2032%2017.0232&1395-0231602&192.971228&%2b49.538062&%2028&355&1967.2&%20%20%20%20%202&%20%20%20%2016&3&17.20&17.23&%20&%20&17.61%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663c9a176910&-out.add=.&-source=I/284/out&USNO-B1.0===1395-0231600&-out.orig=o' class='full'2 1.90812 51 52.89288+49 32 15.48241395-0231600192.970387+49.5376349996041975.2 0 0217.31  21.36     3 2.41212 51 53.17752+49 32 15.73081395-0231603192.971573+49.5377033663191983.2 -24 364  17.9315.5815.9417.36 4 5.56412 51 53.19216+49 32 12.02281395-0231604192.971634+49.5366739999991974.1 0 0421.0419.5316.79  17.50 5 7.21812 51 52.90488+49 32 24.37081395-0231601192.970437+49.540103 883851974.2 0 0420.9219.9619.9119.91   6 7.33612 51 53.37816+49 32 10.96081395-0231606192.972409+49.5363781932871977.6 0 0518.9318.5417.2217.7818.49 %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	1.127	12 51 53.094672	+49 32 17.01996	1395-0235086	..	192.9712278	+49.5380611	B	2.0	0.0	16.0	9.0	17.200	o			17.230	e
2	1.911	12 51 52.892664	+49 32 15.47988	1395-0235084	..	192.9703861	+49.5376333	B	0.0	0.0	0.0	0.0	21.360	B
3	2.411	12 51 53.177328	+49 32 15.73008	1395-0235087	Y.	192.9715722	+49.5377028	B	-24.0	15.0	36.0	13.0	17.670	Y		Y	15.940	B
4	5.566	12 51 53.191992	+49 32 12.01992	1395-0235088	..	192.9716333	+49.5366722	B	0.0	0.0	0.0	0.0	16.790	B			19.530	e
5	7.217	12 51 52.904664	+49 32 24.37008	1395-0235085	..	192.9704361	+49.5401028	B	0.0	0.0	0.0	0.0	19.910	B			19.910	B
6	7.335	12 51 53.377992	+49 32 10.96008	1395-0235090	..	192.9724083	+49.5363778	B	0.0	0.0	0.0	0.0	17.220	B			17.780	B
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6	7.335	12 51 53.377992	+49 32 10.96008	1395-0235090	..	192.9724083	+49.5363778	B	0.0	0.0	0.0	0.0	17.220	B			17.780	B

%22>\EndTABLESORT

Note: This version of the GSC-II has no proper motions, but the limits on brightness which existed on GSC2.2 (F<18.5, B_j<19.5) were removed.

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.3	RAJ2000 deg	DEJ2000 deg	Epoch yr	Fmag mag	jmag mag	Vmag mag	Nmag mag	Class	a pix	e
1	1.543	12 51 53.10888	+49 32 16.2888	N5K6006252	192.971287	+49.537858	1991.280	16.49	15.91	17.43	16.92	3	4.97	0.38
2	7.141	12 51 52.90632	+49 32 24.2952	N5K6006263	192.970443	+49.540082	1991.280	19.78	21.03			0	1.94	0.07
3	8.014	12 51 53.35704	+49 32 10.0644	N5K6006253	192.972321	+49.536129	1991.280	18.23				3	3.33	0.24

%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	[****ClosingBrace(s)Inserted****]
">

mag&%">\BegDIVclass='sort-down ' </A>decNo

fl

1 1.08912 51 53.08032+49 32 16.7028192.971168+49.537973 -3.3 10.8    17.20  17.23  17.61 3 0 2 2.31612 51 53.14944+49 32 15.5616192.971456+49.537656 -31.0 35.4      15.5817.9315.9417.36 4 0 3 4.02612 51 52.62576+49 32 15.1152192.969274+49.537532 -59.8 -17.8    17.3121.36       2 0 4 5.47712 51 53.22144+49 32 12.2424192.971756+49.536734 56.4 9.2    21.0416.7919.53  17.50 4 1 5 6.85312 51 52.89456+49 32 23.9928192.970394+49.539998 -2.0 -14.0    20.9219.9119.9619.91   4 0 6 7.17912 51 53.36496+49 32 11.0652192.972354+49.536407 0.2 7.0    18.9317.2218.5417.7818.49 5 0 %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	e_RAJ2000 (...)	e_DEJ2000 arcsec	magBJ mag	e_ mag	magRF mag	e_ mag	magG mag	e_ mag	magGrvs mag	e_ mag	alphaEpoch yr	deltaEpoch yr	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)
1	0.652	12 51 53.03095	+49 32 16.7643	192.970962	+49.537990	0.020	0.013	15.908	0.300	16.492	0.300	17.568	0.081	17.086	0.111	2002.1000	2002.1000	-3.3	7.9	10.8	7.9
2	2.316	12 51 53.14945	+49 32 15.5618	192.971456	+49.537656	0.115	0.115	15.580	0.400	15.940	0.400	15.816	0.400	16.015	0.500	1983.2300	1983.2300	-31.0	7.1	35.4	7.1
3	5.977	12 51 53.31316	+49 32 12.1677	192.972138	+49.536713	0.115	0.057	20.634	0.202	20.965	0.206	20.592	0.117	20.434	0.139	2002.1000	2002.1000	0.0	0.0	0.0
4	7.409	12 51 52.88429	+49 32 24.5402	192.970351	+49.540150	0.014	0.013	21.033	0.300	19.776	0.300	20.476	0.091	19.783	0.118	2002.1000	2002.1000	-2.0	6.0	-14.0	6.0
5	8.819	12 51 53.32392	+49 32 09.0301	192.972183	+49.535842	0.019	0.018	17.220	0.400	18.233	0.300	19.910	0.091	20.064	0.118	2002.1000	2002.1000	0.2	5.6	7.0	5.6
6	8.873	12 51 53.48408	+49 32 09.7957	192.972850	+49.536054	0.048	0.038	20.897	0.207	20.048	0.204	19.365	0.101	18.080	0.126	2002.1000	2002.1000	0.0	0.0	0.0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 [****ClosingBrace(s)Inserted****]
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%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_DEJ2000

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%22>%5cFONT SIZE=-1"d:m:s"URAT1

RAICRS
deg

DEICRS
deg

Epoch
yr

f.mag
mag

e_
mag

pmRA
mas/yr

pmDE
mas/yr

Jmag
mag

Hmag
mag

Kmag
mag

Bmag
mag

Vmag
mag

gmag
mag

rmag
mag

imag
mag

1 0.94412 51 53.058529+49 32 16.63301698-234342192.9710772+49.53795362013.83617.720 0.021                     %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	2.218	12 51 53.167191	+49 32 15.92191	192.9715300	374.00	+49.5377561	345.00	56358+0006252	0	16.5	12.0	-4.4	11.1	9	40.024	16.492	15.908	16.923	17.432
2	7.472	12 51 52.920742	+49 32 24.64016	192.9705031	112.00	+49.5401778	167.00	56358+0006263	0	13.8	4.2	8.4	6.3	3	40.024	19.776	21.033
3	7.993	12 51 53.339853	+49 32 10.00495	192.9722494	125.00	+49.5361125	210.00	56358+0006253	0	-5.4	3.4	-8.0	5.7	3	36.068	18.233

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