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	3.835	11 41 25.24752	+10 20 18.2400	0975-06782305	175.355198	+10.338400			15.5	14.0	1952.081

%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	3.476	11 41 25.23552	+10 20 18.5604	EO0468-0162631	175.355148	+10.338489	15.68		1	16.12	19.0	0.04	17.08		1	27.43	19.2	1.40
[****ClosingBrace(s)Inserted****]
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%203.476&%3cFONT%20COLOR=%27#CD5B45%27>11%2041%2025.23552&%3cFONT%20COLOR=%27#CD5B45%27>%2b10%2020%2018.5604&EO0468-0162631&175.355148&%2b10.338489&15.68&%20&%201&%20%2016.12&%20%2019.0&%200.04&17.08&%20&%201&%20%2027.43&%20%2019.2&%20%201.40&%20%3cBR%3e">\EndTABLESORT

Note: The construction of the GSC-II is still in progress: this version has no proper motions, and the magnitude limits are 18.5 in F (red) and 19.5 in J (blue). The data are copyrighted, check the data use Policy.

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	3.377	11 41 25.23720	+10 20 18.6720	N20032133202	175.355155	+10.338520	1989.255	14.48	0.42	15.47	0.41	3	7.75	0.10

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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	3.389	11 41 25.24536	+10 20 18.7008	1003-0196526	175.355189	+10.338528	157	138	1975.6	2	12	5	15.40	13.78	14.26	13.61	14.58
2	6.829	11 41 25.60272	+10 20 24.1728	1003-0196530	175.356678	+10.340048	954	340	1991.2	0	0	2				19.01	18.12
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">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%206.829&%3cFONT%20COLOR=%27#CD5B45%27>11%2041%2025.60272&%3cFONT%20COLOR=%27#CD5B45%27>%2b10%2020%2024.1728&1003-0196530&175.356678&%2b10.340048&954&340&1991.2&%20%20%20%20%200&%20%20%20%20%200&2&%20&%20&%20&19.01&18.12%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663da9b33af9ff&-out.add=.&-source=I/284/out&USNO-B1.0===1003-0196528&-out.orig=o' class='full'3 7.32111 41 25.32408+10 20 14.94241003-0196528175.355517+10.3374842652031978.2 46 -28318.33    17.9717.83 4 8.10111 41 24.90288+10 20 14.78041003-0196524175.353762+10.3374399999991971.6 0 0220.29  20.58     %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	3.390	11 41 25.245336	+10 20 18.70008	1003-0200376	Y.	175.3551889	+10.3385278	B	2.0	5.0	12.0	4.0	17.710	Y	17.170	Y	13.610	B
2	6.827	11 41 25.602672	+10 20 24.16992	1003-0200380	..	175.3566778	+10.3400472	B	0.0	0.0	0.0	0.0					19.010	B
3	7.323	11 41 25.324008	+10 20 14.93988	1003-0200378	..	175.3555167	+10.3374833	B	46.0	9.0	-28.0	7.0	18.330	o			17.970	B
4	8.103	11 41 24.902664	+10 20 14.78004	1003-0200374	..	175.3537611	+10.3374389	B	0.0	0.0	0.0	0.0	20.580	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"	[****ClosingBrace(s)Inserted****]
">

%22h:m:s%22&%">\BegDIVclass='sort-down ' </A>string _DEJ2000
"d:m:s"GSC2.3

RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 3.37511 41 25.23744+10 20 18.6756N6HZ003202175.355156+10.3385211989.25514.4815.4716.6915.633 7.75 0.10 %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	3.500	11 41 25.23696	+10 20 18.5424	175.355154	+10.338484	-6.0	6.1			15.40	14.26	13.78	13.61	14.58	5	0
2	7.338	11 41 25.31280	+10 20 14.8704	175.355470	+10.337464	36.2	-30.5			18.33			17.97	17.83	3	0
3	8.346	11 41 24.93000	+10 20 14.3052	175.353875	+10.337307	44.5	-41.0			20.29	20.58				2	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****]
">

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 3.63011 41 25.23079+10 20 18.3808175.355128+10.338439 0.014 0.01115.473 0.30014.475 0.30016.446 0.08015.403 0.1102002.19002002.1900 -6.0 5.3 6.1 5.3 2 6.68911 41 25.58687+10 20 24.3937175.356612+10.340109 0.045 0.04923.150 0.24921.766 0.21220.308 0.17118.516 0.1872002.19002002.1900 0.0 0.0 0.0   3 7.33911 41 25.31279+10 20 14.8699175.355470+10.337464 0.133 0.13318.330 0.40017.970 0.40018.053 0.40017.695 0.5001978.22001978.2200 36.2 7.2 -30.5 7.2 %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"	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	3.498	11 41 25.227528	+10 20 18.50395	502-160634	175.3551147	+10.3384733	2013.824	16.897	0.020

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a