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	3.582	17 25 27.09144	+30 18 35.9424	1200-08387763	261.362881	+30.309984			18.2	17.8	1950.460
2	8.477	17 25 26.77680	+30 18 41.7528	1200-08387708	261.361570	+30.311598			18.9	17.6	1950.460

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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	bDiam arcsec	b-r mag	Mflag
1	3.702	17 25 27.08952	+30 18 36.1332	EO0152-0189717	261.362873	+30.310037	20.00	L	0				18.73		1	3.55	8.0	-1.27
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%203.702&%3cFONT%20COLOR=%27#CD5B45%27>17%2025%2027.08952&%3cFONT%20COLOR=%27#CD5B45%27>%2b30%2018%2036.1332&EO0152-0189717&261.362873&%2b30.310037&20.00&L&%200&%20&%20&%20&18.73&%20&%201&%20%20%203.55&%20%20%208.0&%20-1.27&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66433ecd17fea5&-out.add=.&-source=I/267/out&APM-ID===EO0152-0189656&-out.orig=o' class='full'2 5.88717 25 26.90544+30 18 39.3012EO0152-0189656261.362106+30.31091716.27   2 25.27 19.0 0.6519.58  -1 0.27 6.4 3.31* %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	3.557	17 25 27.11040	+30 18 35.6292	N101332316618	261.362960	+30.309897	1993.455	18.09	0.42	19.03	0.42	3	3.53	0.23
2	3.730	17 25 27.10800	+30 18 35.9316	N101332327091	261.362950	+30.309981	1991.535			18.87	0.26	3	3.74	0.27
3	7.946	17 25 26.79384	+30 18 41.2524	N101332316620	261.361641	+30.311459	1993.455	17.80	0.42	19.41	0.43	3	4.80	0.45
4	8.117	17 25 26.79192	+30 18 41.4216	N101332327092	261.361633	+30.311506	1991.535			19.24	0.26	3	5.56	0.56

%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 [****ClosingBrace(s)Inserted****]
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B2mag

%22>%5cFONT SIZE=-1magR2mag
magImag
mag 1 3.53217 25 27.07416+30 18 36.08281203-0264681261.362809+30.310023 641361976.2 0 0518.8618.2218.2218.0616.09 2 7.94717 25 26.77944+30 18 41.22001203-0264680261.361581+30.311450 93 631976.4 4 -10519.7417.9618.7118.3917.83 3 9.78917 25 27.64872+30 18 32.61241203-0264685261.365203+30.309059233 501994.9 0 02      20.7619.02 %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	3.528	17 25 27.073992	+30 18 36.07992	1203-0268856	.M	261.3628083	+30.3100222	B	0.0	0.0	0.0	0.0	18.220	B			18.060	B	16.940	16.449	15.266
2	7.947	17 25 26.779344	+30 18 41.22000	1203-0268855	YM	261.3615806	+30.3114500	B	4.0	2.0	-10.0	1.0	18.350	Y			18.390	B	16.504	16.077	15.391
3	9.788	17 25 27.648672	+30 18 32.60988	1203-0268860	..	261.3652028	+30.3090583	B	0.0	0.0	0.0	0.0					20.760	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****]
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GSC2.3

%20

%22>RAJ2000
deg

DEJ2000
deg

Epoch
yr

Fmag
mag

jmag
mag

Vmag
mag

Nmag
mag

Class

a
pix

e

1 3.55917 25 27.11040+30 18 35.6328N3JV016618261.362960+30.3098981993.45518.0919.0318.5817.623 3.53 0.23 2 7.94917 25 26.79408+30 18 41.2560N3JV016620261.361642+30.3114601993.45517.8019.4118.5117.643 4.80 0.45 %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	2.890	17 25 27.04272	+30 18 35.5860	261.362678	+30.309885	-10.3	-11.6	16.940	15.266	18.86	18.22	18.22	18.06	16.09	6	1
2	7.871	17 25 26.76912	+30 18 41.1156	261.361538	+30.311421	-0.1	-12.9	16.505	15.392	19.74	18.71	17.96	18.39	17.83	6	0

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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	[****ClosingBrace(s)Inserted****]
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mag&%">\BegDIVclass='sort-down ' </A>decVmag
magNmag
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 2.39717 25 27.02282+30 18 35.1539XPM 240-0368479261.362595+30.309765 -18.29 -14.93 -18.05 -14.6118.09219.03418.58217.62116.940 0.16416.450 0.24215.266 0.166 22580681118.217.8 33347.81472800M 2 7.93417 25 26.76550+30 18 41.1698XPM 240-0368477261.361523+30.311436 -3.33 -10.84 -3.09 -10.5317.80119.40918.50817.63816.505 0.12716.077 0.17215.392   22580680618.917.6 33347.81472800M %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 mag	e_ mag	magG mag	e_ mag	magGrvs mag	e_ mag	alphaEpoch yr	deltaEpoch yr	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)
1	3.411	17 25 27.08691	+30 18 35.7582	261.362862	+30.309933	0.016	0.012	19.034	0.300	18.092	0.300	18.280	0.081	17.288	0.111	2006.3900	2006.3900	-10.3	4.1	-11.6	4.1
2	8.014	17 25 26.77574	+30 18 41.2792	261.361566	+30.311466	0.004	0.004	19.409	0.300	17.801	0.300	18.162	0.081	16.958	0.111	2006.3900	2006.3900	-0.1	4.2	-12.9	4.2
3	9.515	17 25 27.61688	+30 18 31.6143	261.365070	+30.308782	0.037	0.043	23.429	0.245	21.814	0.210	20.497	0.165	18.700	0.181	2006.3900	2006.3900	0.0	0.0	0.0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	URAT1	RAICRS deg	DEICRS deg	Epoch yr	f.mag [****ClosingBrace(s)Inserted****]
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f.mag

%20

%22>%5cFONT SIZE=-1mage_
mag

pmRA
mas/yr

pmDE
mas/yr

Jmag
mag

Hmag
mag

Kmag
mag

Bmag
mag

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mag

gmag
mag

rmag
mag

imag
mag

1 3.31617 25 27.031477+30 18 35.23560602-219318261.3628428+30.30991172012.79718.207 0.025 51.4 34.916.94016.45015.266           2 7.84917 25 26.766428+30 18 41.17520602-219317261.3615654+30.31141942013.31817.845 0.057 9.0 -4.916.50516.07715.392           %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	Rmag mag	Bmag mag	Nmag mag	Vmag mag	Jmag mag	Hmag mag	Kmag mag
1	3.375	17 25 27.091198	+30 18 35.64295	261.3628800	38.00	+30.3099008	98.00	53755+0016618	4	3.2	1.4	2.2	3.5	7	45.977	18.092	19.034	17.621	18.582	16.940	16.450	15.266
2	7.859	17 25 26.775599	+30 18 41.12002	261.3615650	80.00	+30.3114222	68.00	53755+0016620	4	5.8	2.9	-5.6	2.5	7	45.977	17.801	19.409	17.638	18.508	16.505	16.077	15.392

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