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	2.047	13 58 12.21336	+42 39 05.7024	1275-08348390	209.550889	+42.651584			17.0	17.3	1955.281

%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	1.958	13 58 12.19680	+42 39 05.7924	EO1386-0057580	209.550820	+42.651609	17.29		1	9.16	9.4	0.22	18.32		1	7.80	9.2	1.04
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%201.958&%3cFONT%20COLOR=%27#CD5B45%27>13%2058%2012.19680&%3cFONT%20COLOR=%27#CD5B45%27>%2b42%2039%2005.7924&EO1386-0057580&209.550820&%2b42.651609&17.29&%20&%201&%20%20%209.16&%20%20%209.4&%200.22&18.32&%20&%201&%20%20%207.80&%20%20%209.2&%20%201.04&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66354f30322fa8&-out.add=.&-source=I/267/out&APM-ID===EO1386-0057540&-out.orig=o' class='full'2 9.22213 58 11.29152+42 39 08.1108EO1386-0057540209.547048+42.65225320.00L 0      20.75  -1 0.96 5.2 0.75   %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	2.073	13 58 12.22152	+42 39 05.6124	N13030329828	209.550923	+42.651559	1996.367	16.82	0.41	16.87	0.41	3	4.71	0.19

%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	2.009	13 58 12.20280	+42 39 05.7924	1326-0304742	209.550845	+42.651609	96	48	1978.9	0	0	5	17.79	17.46	17.12	16.44	17.18
2	2.120	13 58 12.15744	+42 39 06.3612	1326-0304740	209.550656	+42.651767	257	670	1972.7	0	0	2		19.15			17.14
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%202.120&%3cFONT%20COLOR=%27#CD5B45%27>13%2058%2012.15744&%3cFONT%20COLOR=%27#CD5B45%27>%2b42%2039%2006.3612&1326-0304740&209.550656&%2b42.651767&257&670&1972.7&%20%20%20%20%200&%20%20%20%20%200&2&%20&19.15&%20&%20&17.14%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66354f30322fa8&-out.add=.&-source=I/284/out&USNO-B1.0===1326-0304737&-out.orig=o' class='full'3 9.61213 58 11.27136+42 39 08.57161326-0304737209.546964+42.652381123 761980.6 18 -26321.02  19.5119.58   %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	2.006	13 58 12.202656	+42 39 05.78988	1326-0307209	Y.	209.5508444	+42.6516083	B	0.0	0.0	0.0	0.0	18.350	Y			16.440	B
2	2.118	13 58 12.157344	+42 39 06.36012	1326-0307207	Y.	209.5506556	+42.6517667	B	0.0	0.0	0.0	0.0			17.520	Y	19.150	e
3	9.612	13 58 11.271336	+42 39 08.57016	1326-0307204	..	209.5469639	+42.6523806	B	18.0	4.0	-26.0	2.0	19.510	B			19.580	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"	_DEJ2000 "d:m:s"	GSC2.3 [****ClosingBrace(s)Inserted****]
">

GSC2.3

%22>RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 2.07513 58 12.22176+42 39 05.6124N5OU009828209.550924+42.6515591996.36716.8216.8718.0117.083 4.71 0.19 2 9.26713 58 11.29296+42 39 08.2620N5OU009829209.547054+42.6522951996.36719.5119.62    3 3.07 0.19 %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	1.737	13 58 12.15144	+42 39 05.9508	209.550631	+42.651653	-0.1	-21.5					19.15		17.14	2	0
2	1.988	13 58 12.20904	+42 39 05.6664	209.550871	+42.651574	1.1	-0.1			17.79	17.12	17.46	16.44	17.18	5	0
3	9.548	13 58 11.27136	+42 39 08.4168	209.546964	+42.652338	14.0	-26.8			21.02	19.51		19.58		3	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 1.79813 58 12.19076+42 39 05.6201209.550795+42.651561 0.028 0.03916.870 0.30016.822 0.30017.681 0.08116.816 0.1112003.22002003.2200 1.1 5.3 -0.1 5.3 2 9.90113 58 11.24073+42 39 08.5246209.546836+42.652368 0.114 0.05619.615 0.30019.513 0.30019.627 0.09119.041 0.1182003.22002003.2200 14.0 7.3 -26.8 7.3 %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	1.847	13 58 12.205009	+42 39 05.47698	664-233394	209.5508542	+42.6515214	2012.739	17.785	0.028

%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 2.01713 58 12.218056+42 39 05.56711209.5509086 26.00+42.6515464 57.0056526+00098284 3.8 1.1 -1.2 2.5 942.085 16.822 16.870 17.080 18.012       2 9.62913 58 11.266279+42 39 08.48921209.5469428 70.00+42.6523581 60.0056526+00098294 0.0 3.3 5.2 2.8 541.084 19.513 19.615           %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	1.932	13 58 12.1986800325	+42 39 05.719461869	209.55084771164	+42.65157119965	19.514427	5.263	10.167	28.064	12.579	7.74190e-01		-6.314	16.919	-30.916	20.283	2.78133e-01		6	0	PS1	Gaia	DR9+DR12	Sloan	2M

%0a%0a