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	3.019	01 01 35.79288	+17 06 04.2804	1050-00286183	015.399137	+17.101189			18.0	18.1	1953.997

%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	2.654	01 01 35.76936	+17 06 04.1400	EO0930-0196563	015.399039	+17.101150	18.57		1	11.60	7.7	0.10	19.37		1	8.55	11.4	0.80
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%202.654&%3cFONT%20COLOR=%27#CD5B45%27>01%2001%2035.76936&%3cFONT%20COLOR=%27#CD5B45%27>%2b17%2006%2004.1400&EO0930-0196563&015.399039&%2b17.101150&18.57&%20&%201&%20%2011.60&%20%20%207.7&%200.10&19.37&%20&%201&%20%20%208.55&%20%2011.4&%20%200.80&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6632ba41ed88a&-out.add=.&-source=I/267/out&APM-ID===EO0930-0196847&-out.orig=o' class='full'218.58901 01 34.92480+17 05 47.2200EO0930-0196847015.395520+17.09645018.57  -1 0.47 6.5 0.1121.30  -1 0.56 4.8 2.74   323.55801 01 36.96888+17 05 50.0820EO0930-0196782015.404037+17.09724520.00L 0      21.66  -1 -1.61 3.3 1.66   %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	2.833	01 01 35.77872	+17 06 04.2804	N32333126468	015.399078	+17.101189	1990.965	18.43	0.42	16.75	0.16	3	4.69	0.33

%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	1.780	01 01 35.70600	+17 06 04.0032	1071-0011787	015.398775	+17.101112	57	150	1973.3	0	0	2		19.00			18.43
2	2.829	01 01 35.77272	+17 06 04.4424	1071-0011788	015.399053	+17.101234	56	107	1977.0	0	0	5	17.60	17.95	18.91	18.38	18.05
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%202.829&%3cFONT%20COLOR=%27#CD5B45%27>01%2001%2035.77272&%3cFONT%20COLOR=%27#CD5B45%27>%2b17%2006%2004.4424&1071-0011788&015.399053&%2b17.101234&%2056&107&1977.0&%20%20%20%20%200&%20%20%20%20%200&5&17.60&17.95&18.91&18.38&18.05%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6632ba41ed88a&-out.add=.&-source=I/284/out&USNO-B1.0===1070-0010554&-out.orig=o' class='full'319.09301 01 34.93680+17 05 46.53241070-0010554015.395570+17.096259232 421982.8 8 -144  18.3720.8719.3118.01 %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	1.778	01 01 35.706000	+17 06 03.99996	1071-0011896	..	015.3987750	+17.1011111	B	0.0	0.0	0.0	0.0					19.000	e
2	2.827	01 01 35.772672	+17 06 04.43988	1071-0011897	..	015.3990528	+17.1012333	B	0.0	0.0	0.0	0.0	18.910	B			18.380	B
3	19.096	01 01 34.936656	+17 05 46.52988	1070-0010659	..	015.3955694	+17.0962583	B	8.0	9.0	-14.0	1.0	20.870	B			19.310	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 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.3 [****ClosingBrace(s)Inserted****]
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GSC2.3

%22>RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 2.83801 01 35.77896+17 06 04.2840NBUE006468015.399079+17.1011901990.96518.4316.7518.16  3 4.69 0.33 219.09901 01 34.94976+17 05 46.4208NBUE006452015.395624+17.0962281990.96518.9420.3418.5617.210 2.53 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	1.856	01 01 35.72184	+17 06 03.6900	015.398841	+17.101025	3.8	-12.9					19.00		18.43	2	0
2	2.893	01 01 35.78328	+17 06 04.2804	015.399097	+17.101189	1.5	-6.1			17.60	18.91	17.95	18.38	18.05	5	0
3	19.288	01 01 34.94424	+17 05 46.2480	015.395601	+17.096180	8.4	-23.0				20.87	18.37	19.31	18.01	4	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 [****ClosingBrace(s)Inserted****]
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magRF

%20

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

magG
mag

e_
mag

magGrvs
mag

e_
mag

alphaEpoch
yr

deltaEpoch
yr

pmRA
mas/yr

e_
(...)

pmDE
mas/yr

e_
(...)

1 2.66301 01 35.76982+17 06 04.1483015.399041+17.101152 0.123 0.20116.747 0.30018.428 0.30018.497 0.09017.712 0.1182008.75002008.7500 1.5 5.4 -6.1 5.4 218.95201 01 34.95466+17 05 46.5491015.395644+17.096264 0.005 0.00520.344 0.30018.937 0.30018.952 0.08417.405 0.1132008.75002008.7500 8.4 6.9 -23.0 6.9 %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	2.639	01 01 35.759211	+17 06 04.40105	015.3989967	169.00	+17.1012225	119.00	64502+0006468	4	-4.7	5.6	8.9	3.9	5	39.773	18.428	16.747		18.162
2	19.166	01 01 34.957609	+17 05 46.28112	015.3956567	60.00	+17.0961892	64.00	64502+0006452	0	5.0	2.6	-21.3	2.8	5	39.773	18.937	20.344	17.207	18.560

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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/yr

RADEcor

Dup

<FG>
e-/s

e_
e-/s

<Gmag>
mag

Var

119.18601 01 34.959641512+17 05 46.24277842015.3956651730 1.861+17.0961785496 0.6912784777526810466688       0.7890 4.4086e+02 2.4013e+0018.914NOT_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	19.070	01 01 34.948468176	+17 05 46.46345784	015.3956186174	+17.0962398494	2074007097566272628		10.679	-14.712					20.87	18.37	19.31	18.01	2784777526810466688	18.914

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