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	0.122	21 46 55.45272	+04 54 09.9900	0900-19819950	326.731053	+04.902775			17.8	15.5	1953.781
2	9.236	21 46 55.32000	+04 54 01.0908	0900-19819934	326.730500	+04.900303			17.4	16.9	1953.781

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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	3.526	21 46 55.39536	+04 54 06.6924	EO0860-0263886	326.730814	+04.901859	14.97		2	36.15	20.3	0.65	18.68		1	9.51	9.7	3.72	*
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%203.526&%3cFONT%20COLOR=%27#CD5B45%27>21%2046%2055.39536&%3cFONT%20COLOR=%27#CD5B45%27>%2b04%2054%2006.6924&EO0860-0263886&326.730814&%2b04.901859&14.97&%20&%202&%20%2036.15&%20%2020.3&%200.65&18.68&%20&%201&%20%20%209.51&%20%20%209.7&%20%203.72&%2a%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663f436826107a&-out.add=.&-source=I/267/out&APM-ID===EO0860-0263969&-out.orig=o' class='full'2 9.19921 46 55.31016+04 54 01.1628EO0860-0263969326.730459+04.90032320.00L 0      18.22  -1 -2.35 7.7 -1.78   %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	0.369	21 46 55.47480	+04 54 09.8496	N00232221003	326.731145	+04.902736	1995.568	15.81	0.41	17.25	0.42	3	4.59	0.14
2	9.818	21 46 55.30848	+04 54 00.5328	N00232221004	326.730452	+04.900148	1995.568	17.52	0.42	18.22	0.42	3	2.98	0.16

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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	0.347	21 46 55.44888	+04 54 09.7704	0949-0567953	326.731037	+04.902714	55	65	1978.4	0	0	5	18.34	14.84	16.78	14.95	14.57
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.347&%3cFONT%20COLOR=%27#CD5B45%27>21%2046%2055.44888&%3cFONT%20COLOR=%27#CD5B45%27>%2b04%2054%2009.7704&0949-0567953&326.731037&%2b04.902714&%2055&%2065&1978.4&%20%20%20%20%200&%20%20%20%20%200&5&18.34&14.84&16.78&14.95&14.57%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663f436826107a&-out.add=.&-source=I/284/out&USNO-B1.0===0949-0567952&-out.orig=o' class='full'2 9.50921 46 55.30272+04 54 00.87120949-0567952326.730428+04.900242120 461978.4 0 0517.9815.9117.9216.3616.74 %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	0.349	21 46 55.448664	+04 54 09.77004	0949-0623930	YM	326.7310361	+04.9027139	B	0.0	0.0	0.0	0.0	17.910	Y	17.230	Y	14.950	B	15.535	14.923	14.349
2	9.510	21 46 55.302672	+04 54 00.87012	0949-0623929	YM	326.7304278	+04.9002417	B	0.0	0.0	0.0	0.0	17.290	Y	17.260	Y	16.360	B	16.600	17.149	15.880

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.3	RAJ2000 deg	DEJ2000 deg	[****ClosingBrace(s)Inserted****]
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deg&%">\BegDIVclass='sort-down ' </A>decEpoch
yrFmag
mag

jmag
magVmag
magNmag
magClass

a
pixe

1 0.36921 46 55.47504+04 54 09.8532N0KQ001003326.731146+04.9027371995.56815.8117.2517.0115.573 4.59 0.14 2 9.81421 46 55.30848+04 54 00.5364N0KQ001004326.730452+04.9001491995.56817.5218.2218.3417.170 2.98 0.16 %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	0.315	21 46 55.45848	+04 54 09.7848	326.731077	+04.902718	5.1	-2.0	15.536	14.350	18.34	16.78	14.84	14.95	14.57	6	0
2	9.711	21 46 55.30008	+04 54 00.6732	326.730417	+04.900187	-0.7	-6.6	16.601	15.880	17.98	17.92	15.91	16.36	16.74	6	0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	ID	RAICRS deg	DEICRS deg	pmRAp mas/yr	pmDEp mas/yr	pmRAx mas/yr	pmDEx mas/yr	Fmag mag	Bjmag mag	Vmag [****ClosingBrace(s)Inserted****]
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Vmag

%20

%22>%5cFONT SIZE=-1magNmag
mag

Jmag
mag

e_
mag

Hmag
mag

e_
mag

Kmag
mag

e_
mag

2Mkey

Bmag
mag

Rmag
mag

Fld

dT
yr

fg

fs

M

1 0.25221 46 55.46064+04 54 09.8533XPM 189-0861116326.731086+04.902737 3.23 -0.26 2.84 -0.2415.80817.25417.00515.56915.536 0.08014.923 0.10414.350 0.093107219633017.815.5 57946.80453500M 2 9.77921 46 55.31496+04 54 00.5509XPM 189-0861115326.730479+04.900153 -0.48 -9.00 -0.87 -8.9717.51518.22118.34117.17016.601 0.12217.149  15.880  107219633517.416.9 57946.80453500M %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	0.249	21 46 55.45710	+04 54 09.8494	326.731071	+04.902736	0.007	0.005	17.254	0.300	15.808	0.300	16.921	0.080	15.682	0.110	2005.7300	2005.7300	5.1	3.9	-2.0	3.9
2	9.957	21 46 55.28996	+04 54 00.4578	326.730375	+04.900127	0.004	0.003	18.221	0.300	17.515	0.300	17.636	0.081	16.966	0.110	2005.7300	2005.7300	-0.7	4.7	-6.6	4.7

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	URAT1	RAICRS deg	DEICRS deg	Epoch yr	f.mag mag	e_ mag	pmRA [****ClosingBrace(s)Inserted****]
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pmRA

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%22>%5cFONT SIZE=-1mas/yrpmDE
mas/yr

Jmag
mag

Hmag
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gmag
mag

rmag
mag

imag
mag

1 0.37021 46 55.461160+04 54 09.86216475-520147326.7310817+04.90270312012.84116.905   -1.8 -10.215.53614.92314.350      16.772   %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	0.415	21 46 55.466480	+04 54 09.70994	326.7311103	106.00	+04.9026972	79.00	49898+0001003	4	4.7	4.0	-2.2	3.0	7	41.787	15.808	17.254	15.569	17.005	15.536	14.923	14.350

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