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	3.367	13 01 23.70888	+02 38 06.0432	0900-07289427	195.348787	+02.635012			18.0	16.7	1950.353

%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	3.970	13 01 23.70672	+02 38 06.7308	EO0104-0503090	195.348778	+02.635203	16.83		1	11.83	14.8	0.12	18.27		1	11.37	14.3	1.44
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%203.970&%3cFONT%20COLOR=%27#CD5B45%27>13%2001%2023.70672&%3cFONT%20COLOR=%27#CD5B45%27>%2b02%2038%2006.7308&EO0104-0503090&195.348778&%2b02.635203&16.83&%20&%201&%20%2011.83&%20%2014.8&%200.12&18.27&%20&%201&%20%2011.37&%20%2014.3&%20%201.44&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663c4af71a37de&-out.add=.&-source=I/267/out&APM-ID===EO0104-0503406&-out.orig=o' class='full'2 7.81613 01 23.56272+02 37 55.3008EO0104-0503406195.348178+02.63202819.68   2 6.27 6.8 0.6021.34  -1 1.23 4.5 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	3.879	13 01 23.72640	+02 38 06.4824	N12013124501	195.348860	+02.635134	1997.026	16.59	0.42	17.40	0.41	3	4.09	0.07

%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	3.614	13 01 23.76000	+02 38 05.8020	0926-0287308	195.349000	+02.634945	409	800	1974.8	0	0	2	19.13				16.53
2	4.453	13 01 23.75544	+02 38 06.8928	0926-0287307	195.348981	+02.635248	140	191	1974.8	16	18	5	18.62	16.85	15.67	16.09	16.00
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%204.453&%3cFONT%20COLOR=%27#CD5B45%27>13%2001%2023.75544&%3cFONT%20COLOR=%27#CD5B45%27>%2b02%2038%2006.8928&0926-0287307&195.348981&%2b02.635248&140&191&1974.8&%20%20%20%2016&%20%20%20%2018&5&18.62&16.85&15.67&16.09&16.00%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663c4af71a37de&-out.add=.&-source=I/284/out&USNO-B1.0===0926-0287305&-out.orig=o' class='full'3 7.57913 01 23.53416+02 38 10.61160926-0287305195.348059+02.6362818393741973.3 0 02  19.3220.57     4 8.25013 01 23.58288+02 37 54.85080926-0287306195.348262+02.631903 692251973.3 0 0220.32  20.97     %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	3.612	13 01 23.760000	+02 38 05.79984	0926-0288941	Y.	195.3490000	+02.6349444	B	0.0	0.0	0.0	0.0	18.090	o
2	4.450	13 01 23.755344	+02 38 06.88992	0926-0288940	Y.	195.3489806	+02.6352472	B	16.0	4.0	18.0	5.0	15.670	B	17.880	Y	16.090	B
3	7.578	13 01 23.533992	+02 38 10.61016	0926-0288938	..	195.3480583	+02.6362806	B	0.0	0.0	0.0	0.0	20.570	B			19.320	e
4	8.251	13 01 23.582664	+02 37 54.85008	0926-0288939	..	195.3482611	+02.6319028	B	0.0	0.0	0.0	0.0	20.970	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 3.88413 01 23.72664+02 38 06.4860N4TY004501195.348861+02.6351351997.02616.5917.4018.1716.873 4.09 0.07 2 7.57213 01 23.14512+02 37 59.8008N4TY004477195.346438+02.6332781996.348  22.07    3 2.17 0.52 3 8.63813 01 23.50368+02 37 54.5808N4TY004467195.347932+02.6318281990.370  21.01    3 2.91 0.48 %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	3.782	13 01 23.72640	+02 38 06.3708	195.348860	+02.635103	-14.1	5.3			19.13				16.53	2	0
2	4.182	13 01 23.74272	+02 38 06.6912	195.348928	+02.635192	9.0	5.2			18.62	15.67	16.85	16.09	16.00	5	0
3	7.587	13 01 23.46264	+02 38 10.3992	195.347761	+02.636222	-26.0	-18.1				20.57	19.32			2	0
4	8.204	13 01 23.56680	+02 37 54.9084	195.348195	+02.631919	-8.7	-5.0			20.32	20.97				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 [****ClosingBrace(s)Inserted****]
">

magBJ

%20

%22>%5cFONT SIZE=-1mage_
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 3.87313 01 23.73390+02 38 06.4102195.348891+02.635114 0.023 0.02517.403 0.30016.590 0.30017.366 0.08116.334 0.1112000.34002000.3400 -14.1 6.7 5.3 6.7 2 4.18213 01 23.74277+02 38 06.6909195.348928+02.635192 0.103 0.10315.670 0.40016.090 0.40015.948 0.40016.193 0.5001974.86001974.8600 9.0 5.1 5.2 5.1 3 8.50213 01 23.59262+02 37 54.5956195.348303+02.631832 0.071 0.08221.013 0.30020.681 0.21320.921 0.27220.859 0.2822000.34002000.3400 -8.7 7.1 -5.0 7.1 %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	4.040	13 01 23.725204	+02 38 06.67502	464-131372	195.3488550	+02.6351875	2013.326	17.507	0.106

%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 4.01713 01 23.741140+02 38 06.51302195.3489214 50.00+02.6351425 68.0055414+00045014 1.9 2.2 7.3 3.0 1248.902 16.590 17.403 16.872 18.171       %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 mas/yr	e_ (...)	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	3.956	13 01 23.7059036926	+02 38 06.633391772	195.34889533381	+02.63513851490	19.088940	43.419	6.040	12.614	7.641	6.40354e-01		-13.474	5.542	-17.185	6.031	2.66476e-01		6	10	PS1	Gaia	DR9+DR12	Sloan	2M
2	8.190	13 01 23.0870173191	+02 38 00.251812529	195.34619833096	+02.63340270503	21.344765	0.872	4.213	1.919	4.338	1.13937e-01		-0.207	4.218	1.642	4.578	1.86842e-01		5	10	PS1	Gaia	DR9+DR12	Sloan	2M

%0a%0a