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	1.187	16 23 49.93608	+15 04 48.5220	1050-07918856	245.958067	+15.080145			17.7	16.8	1950.205
2	22.014	16 23 48.78936	+15 04 32.5200	1050-07918696	245.953289	+15.075700			18.5	17.8	1950.205
3	22.924	16 23 50.08272	+15 05 10.8708	1050-07918873	245.958678	+15.086353			19.9	18.3	1950.205

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

b-r

%22>%5cFONT SIZE=-1magMflag

1 1.20016 23 49.92216+15 04 48.9324EO0055-0326611245.958009+15.08025916.99   1 9.20 11.1 0.2918.23   1 7.11 10.9 1.24   221.87416 23 48.78144+15 04 32.8332EO0055-0326847245.953256+15.07578717.61  -1 -0.13 7.2 0.0418.73  -1 0.75 7.7 1.12   323.82116 23 50.05344+15 05 11.8320EO0055-0326258245.958556+15.08662018.53   1 4.32 6.5 0.1621.31  -1 1.69 3.8 2.77   424.76716 23 48.20400+15 04 54.4908EO0055-0326518245.950850+15.08180319.66  -1 -0.47 3.5 0.0521.59L 0     1.93   %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	1.024	16 23 49.92816	+15 04 48.2448	N1030131698	245.958034	+15.080068	1989.270	16.50	0.41	17.35	0.42	3	5.12	0.30
2	22.714	16 23 48.74040	+15 04 32.2392	N1030131593	245.953085	+15.075622	1989.270	18.01	0.41	19.20	0.43	0	2.57	0.07
3	23.433	16 23 50.06400	+15 05 11.4216	N1030131795	245.958600	+15.086506	1989.270	18.36	0.42			3	3.30	0.10

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

%20

%22>%5cFONT SIZE=-1mag 1 1.06116 23 49.92672+15 04 48.53281050-0258388245.958028+15.080148 80 421974.8 0 0518.4216.9617.3116.3516.79 2 5.55816 23 50.04288+15 04 43.31281050-0258389245.958512+15.0786982311351970.7 0 0221.36  20.92     320.07116 23 48.76200+15 05 00.47041050-0258378245.953175+15.083464 953211976.9 12 43  19.6621.6320.08   422.31416 23 51.38088+15 04 51.52081050-0258396245.964087+15.080978 671921976.9 0 0321.73  21.1620.67   522.89616 23 48.72072+15 04 32.27161050-0258377245.953003+15.075631113 571974.8 -16 -6519.2618.1219.0817.9017.67 623.63816 23 50.06280+15 05 11.63041050-0258391245.958595+15.086564 771351974.8 -2 14521.3918.6521.0117.9917.99 724.78216 23 48.19272+15 04 53.90041050-0258375245.950803+15.0816391481731981.0 0 04  19.5321.5919.2118.60 %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	1.060	16 23 49.926672	+15 04 48.52992	1050-0262147	YM	245.9580278	+15.0801472	B	0.0	0.0	0.0	0.0	17.940	Y	17.820	Y	16.350	B	16.803	15.849	15.702
2	5.559	16 23 50.042664	+15 04 43.30992	1050-0262148	..	245.9585111	+15.0786972	B	0.0	0.0	0.0	0.0	20.920	B
3	20.071	16 23 48.762000	+15 05 00.47004	1050-0262137	..	245.9531750	+15.0834639	B	12.0	3.0	4.0	10.0	21.630	B			20.080	B
4	22.311	16 23 51.380664	+15 04 51.52008	1050-0262155	..	245.9640861	+15.0809778	B	0.0	0.0	0.0	0.0	21.160	B			20.670	B
5	22.897	16 23 48.720672	+15 04 32.27016	1050-0262136	..	245.9530028	+15.0756306	B	-16.0	3.0	-6.0	1.0	19.080	B			17.900	B
6	23.637	16 23 50.062656	+15 05 11.63004	1050-0262150	..	245.9585944	+15.0865639	B	-2.0	2.0	14.0	4.0	21.010	B			17.990	B
[****ClosingBrace(s)Inserted****]
6	23.637	16 23 50.062656	+15 05 11.63004	1050-0262150	..	245.9585944	+15.0865639	B	-2.0	2.0	14.0	4.0	21.010	B			17.990	B

%22>\Ahref='VizieR-5?-ref=VIZ664398f3cf7e0&-out.add=.&-source=I/297/out&NOMAD1===1050-0262134' class='full'724.78316 23 48.192672+15 04 53.900041050-0262134..245.9508028+15.0816389B 0.0 0.0 0.0 0.021.590B    19.210B         %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	1.028	16 23 49.92840	+15 04 48.2484	N3RX000698	245.958035	+15.080069	1989.270	16.50	17.35	17.90	16.98	3	5.12	0.30
2	20.465	16 23 48.74808	+15 05 00.8520	N3RX000724	245.953117	+15.083570	1989.270	20.22	22.11			3	1.91	0.24
3	22.471	16 23 51.38928	+15 04 51.7584	N3RX014106	245.964122	+15.081044	1991.363		21.40			0	1.94	0.27
4	22.714	16 23 48.74040	+15 04 32.2392	N3RX000593	245.953085	+15.075622	1989.270	18.01	19.20	18.58	17.54	3	2.57	0.07
5	23.433	16 23 50.06424	+15 05 11.4216	N3RX000795	245.958601	+15.086506	1989.270	18.36	21.19		18.01	3	3.30	0.10
6	24.801	16 23 48.19032	+15 04 53.8320	N3RX000699	245.950793	+15.081620	1989.270	19.45	21.97		18.79	3	2.31	0.16

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

%27%29%22%20onMouseOut=%22laz%28%29%22>b2mag

%20

%22>%5cFONT SIZE=-1magr1mag
mag

r2mag
mag

imag
mag

No

fl

1 0.97616 23 49.91544+15 04 48.6804245.957981+15.080189 -1.0 4.316.80315.70318.4217.3116.9616.3516.79 6 0 2 5.70216 23 50.03880+15 04 43.1184245.958495+15.078644 4.2 -7.9    21.3620.92       2 0 320.16916 23 48.75288+15 05 00.4596245.953137+15.083461 10.4 1.9      21.6319.6620.08   3 0 422.16816 23 51.37080+15 04 51.5100245.964045+15.080975 -2.1 -1.6    21.7321.16  20.67   3 0 523.09116 23 48.70944+15 04 32.1600245.952956+15.075600 -18.0 -10.0    19.2619.0818.1217.9017.67 5 0 623.53616 23 50.05368+15 05 11.5440245.958557+15.086540 -3.2 9.5    21.3921.0118.6517.9917.99 5 0 724.99016 23 48.17784+15 04 53.8896245.950741+15.081636 -3.0 -2.4      21.5919.5319.2118.60 4 0 %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	1.144	16 23 49.90849	+15 04 49.0550	XPM 210-0361684	245.957952	+15.080293	-1.76	10.91	-1.68	11.31	16.500	17.350	17.896	16.981	16.803	0.175	15.849	0.170	15.703	0.213	577504398	17.7	16.8	446	49.020542	0	0	M

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	[****ClosingBrace(s)Inserted****]
">

%22d:m:s%22&%">\BegDIVclass='sort-down ' </A>decRAJ2000
degDEJ2000
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 0.76016 23 49.90877+15 04 48.3461245.957953+15.080096 0.008 0.00917.350 0.30016.500 0.30017.271 0.08116.354 0.1112004.44002004.4400 -1.0 4.5 4.3 4.5 222.19516 23 51.37276+15 04 51.5020245.964053+15.080973 0.016 0.01521.404 0.30020.670 0.40020.579 0.09619.896 0.1222004.44002004.4400 -2.1 7.0 -1.6 7.0 323.05216 23 48.71258+15 04 32.1683245.952969+15.075602 0.003 0.00319.203 0.30018.014 0.30018.124 0.08117.349 0.1112004.44002004.4400 -18.0 5.1 -10.0 5.1 423.32416 23 50.04416+15 05 11.3465245.958517+15.086485 0.015 0.01521.189 0.30018.361 0.30018.702 0.08917.124 0.1172004.44002004.4400 -3.2 5.1 9.5 5.1 524.79716 23 48.18878+15 04 53.7195245.950787+15.081589 0.015 0.01521.970 0.30019.451 0.30019.703 0.10518.052 0.1292004.44002004.4400 -3.0 6.4 -2.4 6.4 %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	0.803	16 23 49.909355	+15 04 49.01438	526-200822	245.9579656	+15.0800978	2013.856	17.662	0.023	2.5	-47.8	16.803	15.849	15.703
2	23.226	16 23 48.701077	+15 04 32.09015	526-200814	245.9529212	+15.0755806	2013.509	18.110	0.023

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

%28...%29&%">\BegDIVclass='sort-down ' </A>decNobs

Dt
yr

Rmag
mag

Bmag
mag

Nmag
mag

Vmag
mag

Jmag
mag

Hmag
mag

Kmag
mag

1 0.93616 23 49.921875+15 04 48.28018245.9580078 125.00+15.0800778 99.0054045+00006984 1.9 4.1 -1.7 3.3 643.156 16.500 17.350 16.981 17.896 16.803 15.849 15.703 223.00316 23 48.717785+15 04 32.16117245.9529908 62.00+15.0756003 77.0054045+00005930 -15.7 2.0 -3.7 2.5 643.156 18.014 19.203 17.535 18.575       323.57816 23 50.063410+15 05 11.56883245.9585975 73.00+15.0865469 131.0054045+00007954 -0.2 2.3 7.0 4.1 543.156 18.361 21.189 18.005         424.70316 23 48.191586+15 04 53.47100245.9507983 182.00+15.0815197 266.0054045+00006994 -5.8 6.1 -19.1 8.9 341.156 19.451 21.970 18.791         %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	22.264	16 23 51.377941808	+15 04 51.46930297	245.9640747575	12.357	+15.0809636953	13.316	4464134959595249664				-0.468	0	9.3540e+01	2.5596e+00	20.597	NOT_AVAILABLE
2	23.245	16 23 48.700359980	+15 04 32.07364096	245.9529181666	0.373	+15.0755760114	0.301	4464134925234851328				0.436	0	9.3189e+02	2.8516e+00	18.101	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