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	1.658	18 28 15.15744	+46 21 11.5020	1350-09694117	277.063156	+46.353195			17.4	17.5	1950.383
2	1.760	18 28 15.21816	+46 21 13.8132	1350-09694127	277.063409	+46.353837			17.7	17.1	1953.524
3	2.134	18 28 15.18072	+46 21 10.5228	1350-09694122	277.063253	+46.352923			17.6	16.7	1953.524
4	3.650	18 28 15.19200	+46 21 08.7912	1350-09694123	277.063300	+46.352442			18.0	17.1	1953.524

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

bStel

%22>bDiam
arcsecb-r
magMflag

1 1.62318 28 15.24888+46 21 10.7316EO0770-0337820277.063537+46.35298117.03   1 17.47 16.8 0.6218.56   2 31.15 15.0 1.52   2 2.10018 28 15.16344+46 21 10.7100EO0130-0366363277.063181+46.35297516.24   1 16.77 16.9 0.5918.15   1 20.20 17.2 1.91   %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	1.795	18 28 15.21216	+46 21 10.7172	N030002348943	277.063384	+46.352977	1993.393	16.45	0.41	18.54	0.41	3	7.02	0.43
2	2.356	18 28 15.15672	+46 21 10.4328	N030002366561	277.063153	+46.352898	1991.598	16.39	0.42	17.30	0.42	3	6.59	0.55

%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	0.691	18 28 15.36072	+46 21 12.5424	1363-0289879	277.064003	+46.353484	999	999	1972.5	0	0	4	19.90	16.67	20.41		16.71
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.691&%3cFONT%20COLOR=%27#CD5B45%27>18%2028%2015.36072&%3cFONT%20COLOR=%27#CD5B45%27>%2b46%2021%2012.5424&1363-0289879&277.064003&%2b46.353484&999&999&1972.5&%20%20%20%20%200&%20%20%20%20%200&4&19.90&16.67&20.41&%20&16.71%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663dfdff1056d0&-out.add=.&-source=I/284/out&USNO-B1.0===1363-0289874&-out.orig=o' class='full'2 1.54918 28 15.19272+46 21 11.18161363-0289874277.063303+46.3531062564541974.6 6 38519.0516.9117.0216.1816.30 3 1.98118 28 15.20688+46 21 14.00041363-0289877277.063362+46.353889149 821975.6 0 0519.7917.1217.8217.0917.29 4 3.13818 28 15.28344+46 21 15.40081363-0289878277.063681+46.3542784497851964.4 0 0320.7118.05    17.26 5 3.28418 28 15.20472+46 21 09.13321363-0289875277.063353+46.3525371261021976.0 10 -30518.3216.6417.8517.1516.79 6 6.89618 28 15.89088+46 21 15.44041363-0289881277.066212+46.3542893939991992.0 0 02    20.2320.18   7 8.00418 28 16.00152+46 21 15.62041363-0289882277.066673+46.354339458 591992.0 0 02    20.1120.44   %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	0.690	18 28 15.360672	+46 21 12.53988	1363-0294198	..	277.0640028	+46.3534833	B	0.0	0.0	0.0	0.0	20.410	B			16.670	e
2	1.551	18 28 15.192672	+46 21 11.18016	1363-0294193	..	277.0633028	+46.3531056	B	6.0	7.0	38.0	14.0	17.020	B			16.180	B
3	1.981	18 28 15.206664	+46 21 14.00004	1363-0294196	..	277.0633611	+46.3538889	B	0.0	0.0	0.0	0.0	17.820	B			17.090	B
4	3.137	18 28 15.283344	+46 21 15.40008	1363-0294197	..	277.0636806	+46.3542778	B	0.0	0.0	0.0	0.0	20.710	o			18.050	e
5	3.287	18 28 15.204672	+46 21 09.12996	1363-0294194	YM	277.0633528	+46.3525361	B	10.0	4.0	-30.0	3.0	18.090	Y			17.150	B	16.826	16.032	15.814
6	6.894	18 28 15.890664	+46 21 15.44004	1363-0294200	..	277.0662111	+46.3542889	B	0.0	0.0	0.0	0.0	20.230	B			20.180	B
[****ClosingBrace(s)Inserted****]
6	6.894	18 28 15.890664	+46 21 15.44004	1363-0294200	..	277.0662111	+46.3542889	B	0.0	0.0	0.0	0.0	20.230	B			20.180	B

%22>\Ahref='VizieR-5?-ref=VIZ663dfdff1056d0&-out.add=.&-source=I/297/out&NOMAD1===1363-0294201' class='full'7 8.00218 28 16.001328+46 21 15.620041363-0294201..277.0666722+46.3543389B 0.0 0.0 0.0 0.020.110B    20.440B         %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	RAJ2000 deg	DEJ2000 deg	Epoch yr	Fmag mag	jmag mag	Vmag mag	Nmag mag	Class	a pix	e
1	1.793	18 28 15.21240	+46 21 10.7172	N2DN066561	277.063385	+46.352977	1993.393	16.45	19.54	17.94	17.63	3	7.02	0.43

%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	0.383	18 28 15.33624	+46 21 12.2256	277.063901	+46.353396	31.7	-29.7			19.90	20.41	16.67		16.71	4	1
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.383&%3cFONT%20COLOR=%27#CD5B45%27>18%2028%2015.33624&%3cFONT%20COLOR=%27#CD5B45%27>%2b46%2021%2012.2256&277.063901&%2b46.353396&%20%20%20%2031.7&%20%20%20-29.7&%20&%20&19.90&20.41&16.67&%20&16.71&%204&%201%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663dfdff1056d0&-out.add=.&-source=I/317/sample&PPMXL===%20189520324331457286' class='full'2 1.67618 28 15.17496+46 21 11.1960277.063229+46.353110 -1.0 38.3    19.0517.0216.9116.1816.30 5 0 3 1.95218 28 15.19104+46 21 13.8636277.063296+46.353851 -6.8 -1.5    19.7917.8217.1217.0917.29 5 0 4 2.81018 28 15.27552+46 21 15.0660277.063648+46.354185 -0.7 -16.2    20.71  18.05  17.26 3 1 5 4.02418 28 15.16032+46 21 08.5104277.063168+46.352364 -4.1 -45.316.82615.81518.3217.8516.6417.1516.79 6 1 %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	ID	RAICRS deg	DEICRS deg	pmRAp mas/yr	pmDEp mas/yr	pmRAx mas/yr	pmDEx mas/yr	Fmag mag	Bjmag mag	Vmag mag	Nmag mag	Jmag mag	e_ mag	Hmag mag	e_ mag	Kmag mag	e_ mag	2Mkey	Bmag mag	Rmag mag	Fld	dT yr	fg	fs	M
1	4.948	18 28 15.09745	+46 21 07.7832	XPM 272-0423612	277.062906	+46.352162	-18.67	-20.73	-18.33	-20.11					16.826	0.171	16.032	0.180	15.815	0.235	1053494969	18.0	17.1	183	46.740181	0	0	M

%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 [****ClosingBrace(s)Inserted****]
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RAJ2000

%20

%22>%5cFONT SIZE=-1degDEJ2000
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e_RAJ2000
(...)

e_DEJ2000
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magBJ
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e_
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magRF
mag

e_
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alphaEpoch
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yr

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pmDE
mas/yr

e_
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1 0.38318 28 15.33628+46 21 12.2258277.063901+46.353396 0.115 0.13320.410 0.40016.670 0.40015.685 0.40013.577 0.5001972.53001972.5300 31.7 6.0 -29.7 7.0 2 1.67718 28 15.17492+46 21 11.1958277.063229+46.353110 0.103 0.10319.535 0.30016.453 0.30016.125 0.40014.171 0.5001974.67001974.6700 -1.0 5.2 38.3 5.2 3 1.95218 28 15.19106+46 21 13.8639277.063296+46.353851 0.103 0.10317.820 0.40017.090 0.40017.257 0.40016.623 0.5001975.65001975.6500 -6.8 5.3 -1.5 5.3 4 2.81018 28 15.27552+46 21 15.0659277.063648+46.354185 0.133 0.13320.710 0.40018.050 0.40017.998 0.40016.202 0.5001964.41001964.4100 -0.7 6.7 -16.2 6.7 5 4.02418 28 15.16033+46 21 08.5102277.063168+46.352364 0.093 0.10317.850 0.40017.150 0.40017.311 0.40016.699 0.5001980.34001980.3400 -4.1 4.9 -45.3 5.4 %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	1.483	18 28 15.169115	+46 21 11.65396	682-261391	277.0632046	+46.3532372	2013.007	18.150	0.039
2	3.424	18 28 15.250454	+46 21 15.65389	682-261392	277.0635436	+46.3543483	2013.201	18.540	0.018
3	4.833	18 28 15.095194	+46 21 07.75602	682-261390	277.0632044	+46.3521186	2013.440	17.996	0.030	56.9	-9.6	16.826	16.032	15.815

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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	pmRA mas/yr	pmDE mas/yr	[****ClosingBrace(s)Inserted****]
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mas/yr&%">\BegDIVclass='sort-down ' </A>decRADEcor

Dup

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e-/s

e_
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<Gmag>
mag

Var

1 3.44118 28 15.261149966+46 21 15.68568196277.0635881249 0.619+46.3543571339 2.5202118693451429012608       0.6790 3.0652e+02 3.0842e+0019.309NOT_AVAILABLE 2 4.05818 28 15.019312341+46 21 15.10452839277.062580468115.861+46.354195702324.4692118693421358732928      -0.1820 8.0253e+01 2.8781e+0020.764NOT_AVAILABLE 3 4.81618 28 15.167356803+46 21 07.64937657277.0631973200 0.287+46.3521248268 1.1972118693417068145152       0.6920 7.4215e+02 2.3082e+0018.349NOT_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	3.457	18 28 15.265575792	+46 21 15.70665816	277.0636065658	+46.3543629606	189520325197777069		-3.055	-1.401				20.71		18.05		17.26	2118693451429012608	19.309
2	4.107	18 28 15.168942144	+46 21 08.38907676	277.0632039256	+46.3523302991	189520324123267648		-1.094	-49.313	16.826	16.032	15.815	18.32	17.85	16.64	17.15	16.79	2118693417068145152	18.349

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