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	4.197	22 50 05.06472	+21 02 07.4220	1050-20455098	342.521103	+21.035395			18.9	18.2	1954.583
2	5.407	22 50 05.11872	+21 02 08.4300	1050-20455107	342.521328	+21.035675			18.2	18.1	1954.583
3	8.729	22 50 05.23800	+21 02 11.3208	1050-20455126	342.521825	+21.036478			19.1	18.3	1954.583

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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 [****ClosingBrace(s)Inserted****]
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b-r

%22>%5cFONT SIZE=-1magMflag

1 5.28322 50 05.12088+21 02 08.2824EO1161-0040166342.521337+21.03563417.94   1 14.65 13.3 0.6418.36   1 25.11 19.4 0.43   2 6.95922 50 04.60944+21 02 08.2320EO1161-0040167342.519206+21.03562020.00   1 2.01 3.2 0.2922.17L 0     2.17   %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	5.825	22 50 05.16936	+21 02 08.5524	N00302311284	342.521539	+21.035709	1990.787	16.62	0.40	17.27	0.41	3	9.12	0.74

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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	2.478	22 50 04.85280	+21 02 01.5828	1110-0586879	342.520220	+21.033773	79	15	1972.6	0	0	2	20.66			19.25
2	2.761	22 50 05.06208	+21 02 05.8812	1110-0586881	342.521092	+21.034967	253	144	1967.2	-2	-36	3	19.46	18.54	18.87
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%202.761&%3cFONT%20COLOR=%27#CD5B45%27>22%2050%2005.06208&%3cFONT%20COLOR=%27#CD5B45%27>%2b21%2002%2005.8812&1110-0586881&342.521092&%2b21.034967&253&144&1967.2&%20%20%20%20-2&%20%20%20-36&3&19.46&18.54&18.87&%20&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ662b55a422b874&-out.add=.&-source=I/284/out&USNO-B1.0===1110-0586878&-out.orig=o' class='full'3 4.16722 50 04.81608+21 01 59.87281110-0586878342.520067+21.0332982564041972.6 0 0221.13    19.88   4 5.62722 50 05.11800+21 02 08.67121110-0586882342.521325+21.0357421715191973.3 -38 -58419.8618.7718.17  17.47 5 6.75022 50 04.59480+21 02 07.68121110-0586876342.519145+21.035467278 391979.3 0 -83  19.4620.7319.28   %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	2.481	22 50 04.852656	+21 02 01.57992	1110-0625099	..	342.5202194	+21.0337722	B	0.0	0.0	0.0	0.0	20.660	o			19.250	B
2	2.759	22 50 05.062008	+21 02 05.88012	1110-0625101	..	342.5210917	+21.0349667	B	-2.0	6.0	-36.0	3.0	18.870	B			18.540	e
3	4.170	22 50 04.816008	+21 01 59.86992	1110-0625098	..	342.5200667	+21.0332972	B	0.0	0.0	0.0	0.0	21.130	o			19.880	B
4	5.626	22 50 05.118000	+21 02 08.67012	1110-0625102	..	342.5213250	+21.0357417	B	-38.0	5.0	-58.0	15.0	18.170	B			18.770	e
5	6.751	22 50 04.594656	+21 02 07.68012	1110-0625096	..	342.5191444	+21.0354667	B	0.0	10.0	-8.0	1.0	20.730	B			19.280	B

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_DEJ2000
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GSC2.3

RAJ2000
deg

DEJ2000
deg

Epoch
yr

Fmag
mag

jmag
mag

Vmag
mag

Nmag
mag

Class

a
pix

e

1 5.83022 50 05.16960+21 02 08.5560N0ML001284342.521540+21.0357101990.78716.6217.2718.8218.793 9.12 0.74 2 6.61022 50 04.60128+21 02 07.5696N0ML001254342.519172+21.0354361990.78719.3621.13    3 2.41 0.25 %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	2.589	22 50 04.85688	+21 02 01.3920	342.520237	+21.033720	0.6	-5.3			20.66			19.25		2	0
2	2.607	22 50 05.06568	+21 02 05.6760	342.521107	+21.034910	-1.7	-42.2			19.46	18.87	18.54			3	0
3	3.846	22 50 04.82352	+21 02 00.1860	342.520098	+21.033385	5.6	6.1			21.13			19.88		2	0
4	5.634	22 50 05.12136	+21 02 08.6604	342.521339	+21.035739	-38.0	-61.6			19.86	18.17	18.77		17.47	4	0
5	6.718	22 50 04.58808	+21 02 07.5084	342.519117	+21.035419	-4.5	-12.5				20.73	19.46	19.28		3	0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 [****ClosingBrace(s)Inserted****]
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e_RAJ2000

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%22>%5cFONT SIZE=-1(...)e_DEJ2000
arcsec

magBJ
mag

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mag

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mag

e_
mag

magG
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e_
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alphaEpoch
yr

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yr

pmRA
mas/yr

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pmDE
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1 2.58922 50 04.85687+21 02 01.3921342.520237+21.033720 0.163 0.16320.660 0.40019.250 0.40019.492 0.40018.385 0.5001972.68001972.6800 0.6 9.0 -5.3 9.0 2 3.84622 50 04.82357+21 02 00.1861342.520098+21.033385 0.163 0.16321.130 0.40019.880 0.40020.115 0.40019.115 0.5001972.68001972.6800 5.6 9.0 6.1 9.0 3 5.63422 50 05.12135+21 02 08.6602342.521339+21.035739 0.115 0.11518.170 0.40018.770 0.40018.573 0.40018.960 0.5001973.37001973.3700 -38.0 6.1 -61.6 6.1 4 6.06122 50 05.15739+21 02 08.9040342.521489+21.035807 0.038 0.04318.964 0.20018.375 0.20017.999 0.08317.064 0.1122009.79002009.7900 0.0 0.0 0.0   5 6.10922 50 05.18234+21 02 08.7761342.521593+21.035771 0.400 0.40017.273 0.30016.622 0.30016.773 0.40016.197 0.5001990.79001990.7900 19.9 8.9 24.2 17.7 6 6.79622 50 04.59629+21 02 07.7796342.519151+21.035494 0.048 0.05021.134 0.30019.358 0.30019.944 0.09518.731 0.1222009.79002009.7900 -4.5 7.6 -12.5 7.6 %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	6.066	22 50 05.174246	+21 02 08.79002	342.5215594	156.00	+21.0357750	188.00	49965+0001284	4	11.1	4.8	8.8	5.7	4	38.135	16.622	17.273	18.794	18.821
2	6.603	22 50 04.590397	+21 02 07.36008	342.5191267	126.00	+21.0353778	11.00	49965+0001254	4	2.8	4.7	-24.4	0.4	3	38.134	19.358	21.134

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RA_ICRS deg	DE_ICRS deg	rmag mag	pmRA [****ClosingBrace(s)Inserted****]
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pmRA

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pmGRA
mas/yr

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mas/yr

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pmxDE
mas/yr

e_
(...)

Chi2DE

pmGDE
mas/yr

Nobs

Flag

PS1

Gaia

DR9+DR12

Sloan

2M

1 5.84022 50 05.1328995860+21 02 07.041162834342.52146365847+21.0357498238619.982765 25.731 12.368 -5.581 13.871 4.36572e-01   165.820 20.307 0.584 25.902 4.48971e-01   710PS1Gaia DR9+DR12Sloan2M %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	Class	Gmag mag	OMag mag	Bjmag mag	Fpgmag mag	Epgmag mag	Npgmag mag	Umag mag	Bmag mag	Vmag mag	umag mag	gmag mag	rmag mag	imag mag	zmag mag	ymag mag	Jmag mag	Hmag mag	Ksmag mag	Zmag mag	Ymag mag	W1mag mag	W2mag mag	W3mag mag	W4mag mag	FUVmag mag	NUVmag mag	a pix	e pix	PA pix
1	4.608	22 50 05.1205323468	+21 02 07.537846051	N0ML018011	342.52133555145	+21.03542717946	1003023118011	2009.792	3										24.635	23.944	22.406	22.591	20.554							15.540	15.560	11.666	8.518
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1	4.608	22 50 05.1205323468	+21 02 07.537846051	N0ML018011	342.52133555145	+21.03542717946	1003023118011	2009.792	3										24.635	23.944	22.406	22.591	20.554							15.540	15.560	11.666	8.518

%22>\Ahref='VizieR-5?-ref=VIZ662b55a422b874&-out.add=.&-source=I/353/gsc242&-c=342.52147767000%20%2b21.03575060000,eq=ICRS,rs=2&-out.orig=o' class='full'2 5.86322 50 05.1546408000+21 02 08.702160000N0ML041327342.52147767000+21.03575060000 10030231413272012.3333                    20.28320.16019.77819.76119.1288                  21.53021.055       3 5.88122 50 05.1378695957+21 02 08.398443111N0ML001284342.52148432000+21.03575313000 1003023112842012.9123  18.91230017.27330016.622500  18.794600      19.75920.30820.00219.59519.69119.1102                       9.117 0.736118.1 4 6.58722 50 04.5969620674+21 02 07.921544912N0ML001254342.51918984000+21.03544652000 1003023112542012.0993    21.13400019.358200          21.85321.29920.65420.30320.16019.5635                       2.406 0.248 13.6 %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"	WISE	RAJ2000 deg	DEJ2000 deg	eeMaj arcsec	eeMin arcsec	Im	W1mag mag	e_ mag	W2mag mag	e_ mag	W3mag mag	e_ mag	W4mag mag	e_ mag	Jmag mag	Hmag mag	Kmag mag	ccf	ex	var	d2M arcsec	2M
1	5.035	22 50 05.08118	+21 02 08.2289	J225005.08+210208.2	342.521172	+21.035619	0.369	0.343	Im	15.692	0.061	15.812	0.194	12.214		8.248					0000	0	0nnn		2M

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