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	0.278	11 27 31.67472	+59 55 21.2304	1425-07665284	171.881978	+59.922564			19.9	19.7	1953.209

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cB%3e%3cFONT%20COLOR=%27#CD5B45%27>%20The%20current%20version%20includes%20only%20the%20North%20%28POSS-I%20plates%29%3cP%3e%0a

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	0.117	11 27 31.64016	+59 55 21.3708	EO0712-0083238	171.881834	+59.922603	19.93		-1	-1.55	2.9	0.16	21.88	L	0			1.95
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.117&%3cFONT%20COLOR=%27#CD5B45%27>11%2027%2031.64016&%3cFONT%20COLOR=%27#CD5B45%27>%2b59%2055%2021.3708&EO0712-0083238&171.881834&%2b59.922603&19.93&%20&-1&%20%20-1.55&%20%20%202.9&%200.16&21.88&L&%200&%20&%20&%20%201.95&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663979953d66c8&-out.add=.&-source=I/267/out&APM-ID===EO0723-0116543&-out.orig=o' class='full'2 0.80511 27 31.75152+59 55 21.7416EO0723-0116543171.882298+59.92270620.00L 0      21.04   1 2.83 7.0 1.04   %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	0.063	11 27 31.64400	+59 55 21.4716	1499-0199253	171.881850	+59.922631	172	249	1973.5	0	0	4	20.50	20.40	20.65	20.15

%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 [****ClosingBrace(s)Inserted****]
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Jmag

%22>%5cFONT SIZE=-1magHmag
magKmag
magR

1 0.06311 27 31.644000+59 55 21.470161499-0207005..171.8818500+59.9226306B 0.0 0.0 0.0 0.020.650B    20.150B         %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 "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	0.348	11 27 31.65912	+59 55 21.1044	N7L7002640	171.881913	+59.922529	1993.305	19.84	21.32			3	1.98	0.12

%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	0.054	11 27 31.64880	+59 55 21.3996	171.881870	+59.922611	-0.1	-4.1			20.50	20.65	20.40	20.15		4	0
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.054&%3cFONT%20COLOR=%27#CD5B45%27>11%2027%2031.64880&%3cFONT%20COLOR=%27#CD5B45%27>%2b59%2055%2021.3996&171.881870&%2b59.922611&%20%20%20%20-0.1&%20%20%20%20-4.1&%20&%20&20.50&20.65&20.40&20.15&%20&%204&%200%3cBR%3e">\EndTABLESORT

Note:

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	0.163	11 27 31.67170	+59 55 21.3824	171.881965	+59.922606	0.043	0.047	21.319	0.300	19.843	0.300	20.459	0.102	19.770	0.127	2001.2800	2001.2800	-0.1	5.7	-4.1	5.7

%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"	RA_ICRS deg	DE_ICRS deg	rmag mag	pmRA mas/yr	e_ (...)	pmxRA [****ClosingBrace(s)Inserted****]
">

pmxRA

%20

%22>%5cFONT SIZE=-1mas/yre_
(...)

Chi2RA

pmGRA
mas/yr

pmDE
mas/yr

e_
(...)

pmxDE
mas/yr

e_
(...)

Chi2DE

pmGDE
mas/yr

Nobs

Flag

PS1

Gaia

DR9+DR12

Sloan

2M

1 0.13411 27 31.6996192063+59 55 21.665259798171.88195438233+59.9226344027520.748034 -22.979 21.214 -23.235 21.226 1.59483e-02   -18.141 11.326 -17.296 11.336 2.61615e-01   6 0PS1Gaia 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	0.115	11 27 31.6658880000	+59 55 21.403812000	N7L7002640	171.88194120000	+59.92261217000	121212232640	2012.106	3			21.319100	19.843400						21.542	21.060	20.820	20.782	20.837	19.6230										22.077	21.032	1.984	0.123	165.6
[****ClosingBrace(s)Inserted****]
1	0.115	11 27 31.6658880000	+59 55 21.403812000	N7L7002640	171.88194120000	+59.92261217000	121212232640	2012.106	3			21.319100	19.843400						21.542	21.060	20.820	20.782	20.837	19.6230										22.077	21.032	1.984	0.123	165.6

%22>\Ahref='VizieR-5?-ref=VIZ663979953d66c8&-out.add=.&-source=I/353/gsc242&-c=171.88223519985%20%2b59.92359702297,eq=ICRS,rs=2&-out.orig=o' class='full'2 3.55811 27 31.7364479645+59 55 24.949282698N7L7037788171.88223519985+59.92359702297 12121223377882006.0004                                                  21.424       %0a%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20SDSS%20is%20also%20available%20from%20http://www.sdss.org/%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	mode	cl	SDSS	m_	zsp	umag mag	e_ mag	gmag mag	e_ mag	rmag mag	e_ mag	imag mag	e_ mag	zmag mag	e_ mag	RA_ICRS deg	DE_ICRS deg	ObsDate yr	Q
1	0.152	11 27 31.66910	+59 55 21.3654	1	3	J112731.66+595521.3			21.597	0.157	20.870	0.040	20.758	0.047	20.493	0.057	20.518	0.165	171.881956	+59.922604	2001.2874	2
2	7.211	11 27 31.83216	+59 55 28.5312	1	3	J112731.83+595528.5			24.328	1.159	24.393	0.710	23.083	0.344	21.975	0.205	21.944	0.488	171.882634	+59.924592	2001.2874	2

%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