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	3.881	08 00 54.85800	+74 59 09.3912	1575-02804919	120.228575	+74.985942			19.9	18.7	1954.903
2	8.663	08 00 52.00488	+74 59 13.9524	1575-02804799	120.216687	+74.987209			17.7	17.9	1954.903

%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	2.421	08 00 54.67272	+74 59 10.7412	EO1295-0468317	120.227803	+74.986317	18.13		2	17.68	11.0	0.61	21.10		2	10.57	6.7	2.97
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%202.421&%3cFONT%20COLOR=%27#CD5B45%27>08%2000%2054.67272&%3cFONT%20COLOR=%27#CD5B45%27>%2b74%2059%2010.7412&EO1295-0468317&120.227803&%2b74.986317&18.13&%20&%202&%20%2017.68&%20%2011.0&%200.61&21.10&%20&%202&%20%2010.57&%20%20%206.7&%20%202.97&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663d95131f1337&-out.add=.&-source=I/267/out&APM-ID===EO1295-0468273&-out.orig=o' class='full'2 8.89108 00 51.97416+74 59 14.4600EO1295-0468273120.216559+74.98735017.56  -1 -1.48 6.2 0.0718.00  -1 0.23 7.8 0.44   %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	1.799	08 00 54.56376	+74 59 11.2092	N21011336564	120.227349	+74.986447	1991.933	17.96	0.41			3	4.70	0.36
2	8.556	08 00 52.04952	+74 59 14.2476	N21011336568	120.216873	+74.987291	1991.933	17.45	0.39	18.46	0.38	3	2.94	0.08

%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	0.358	08 00 54.26016	+74 59 12.5304	1649-0054965	120.226084	+74.986814	166	454	1979.9	0	0	5	20.15	18.95	20.03	18.49	18.59
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.358&%3cFONT%20COLOR=%27#CD5B45%27>08%2000%2054.26016&%3cFONT%20COLOR=%27#CD5B45%27>%2b74%2059%2012.5304&1649-0054965&120.226084&%2b74.986814&166&454&1979.9&%20%20%20%20%200&%20%20%20%20%200&5&20.15&18.95&20.03&18.49&18.59%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663d95131f1337&-out.add=.&-source=I/284/out&USNO-B1.0===1649-0054967&-out.orig=o' class='full'2 3.78608 00 54.87480+74 59 09.58201649-0054967120.228645+74.9859952721101979.9 0 0520.9618.9620.6918.9218.37 3 5.83808 00 54.83136+74 59 07.00081649-0054966120.228464+74.9852785769991976.4 0 0221.07  20.53     4 8.85708 00 51.97488+74 59 14.33041649-0054962120.216562+74.987314 43 751979.9 0 0518.2718.0618.0117.3917.85 %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	0.357	08 00 54.259992	+74 59 12.53004	1649-0055725	..	120.2260833	+74.9868139	B	0.0	0.0	0.0	0.0	20.030	B			18.490	B
2	3.787	08 00 54.874656	+74 59 09.57984	1649-0055727	..	120.2286444	+74.9859944	B	0.0	0.0	0.0	0.0	20.690	B			18.920	B
3	5.839	08 00 54.831336	+74 59 07.00008	1649-0055726	..	120.2284639	+74.9852778	B	0.0	0.0	0.0	0.0	20.530	B
4	8.858	08 00 51.974664	+74 59 14.33004	1649-0055722	..	120.2165611	+74.9873139	B	0.0	0.0	0.0	0.0	18.010	B			17.390	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 1.80008 00 54.56400+74 59 11.2092N76N006564120.227350+74.9864471991.93317.9620.95  17.833 4.70 0.36 2 4.54908 00 54.99024+74 59 08.9556N76N007563120.229126+74.9858211998.001  21.67    3 1.89 0.56 3 8.55508 00 52.04976+74 59 14.2476N76N006568120.216874+74.9872911991.93317.4518.4618.2016.763 2.94 0.08 %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	0.617	08 00 54.24192	+74 59 12.8724	120.226008	+74.986909	-3.7	10.7			20.15	20.03	18.95	18.49	18.59	5	0
2	2.886	08 00 54.70752	+74 59 10.2048	120.227948	+74.986168	-14.6	74.4			21.07	20.53				2	0
3	3.985	08 00 54.88680	+74 59 09.3516	120.228695	+74.985931	5.3	-5.8			20.96	20.69	18.96	18.92	18.37	5	0
4	8.719	08 00 52.00224	+74 59 14.1756	120.216676	+74.987271	0.0	-1.1			18.27	18.01	18.06	17.39	17.85	5	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 [****ClosingBrace(s)Inserted****]
">

e_DEJ2000

%20

%22>%5cFONT SIZE=-1arcsecmagBJ
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 0.61708 00 54.24196+74 59 12.8721120.226008+74.986909 0.103 0.10320.030 0.40018.490 0.40018.730 0.40017.540 0.5001979.99001979.9900 -3.7 5.0 10.7 5.0 2 2.88608 00 54.70757+74 59 10.2053120.227948+74.986168 0.163 0.16320.948 0.30017.958 0.30017.699 0.40015.776 0.5001976.45001976.4500 -14.6 7.5 74.4 7.5 3 3.98508 00 54.88678+74 59 09.3522120.228695+74.985931 0.103 0.10321.671 0.30018.920 0.40018.816 0.40016.984 0.5001979.99001979.9900 5.3 5.0 -5.8 5.0 4 8.71908 00 52.00224+74 59 14.1759120.216676+74.987271 0.103 0.10318.463 0.30017.453 0.30017.665 0.40016.831 0.5001979.99001979.9900 0.0 5.0 -1.1 5.0 %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"	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	8.716	08 00 52.013054	+74 59 14.34408	825-052522	120.2167211	+74.9873178	2013.843	17.902	0.022

%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	[****ClosingBrace(s)Inserted****]
">

yr&%">\BegDIVclass='sort-down ' </A>decRmag
magBmag
mag

Nmag
mag

Vmag
mag

Jmag
mag

Hmag
mag

Kmag
mag

1 8.61708 00 52.039261+74 59 14.34301120.2168303 43.00+74.9873175 31.0058463+00065683 0.6 1.6 0.0 1.1 645.330 17.453 18.463 16.759 18.200       %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RA_ICRS deg	e_ mas	DE_ICRS deg	e_ mas	Source	Plx mas	pmRA mas/yr	pmDE mas/yr	RADEcor	Dup	<FG> e-/s	e_ e-/s	<Gmag> mag	Var
1	8.700	08 00 52.016631985	+74 59 14.33052100	120.2167359666	0.200	+74.9873140336	0.255	1135764003613233152				-0.265	0	1.2313e+03	2.4569e+00	17.799	NOT_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