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	4.002	01 30 02.83800	+21 53 06.6228	1050-00410690	022.511825	+21.885173			19.7	18.0	1954.739
2	5.163	01 30 02.92200	+21 53 06.7632	1050-00410693	022.512175	+21.885212			18.8	18.2	1954.739
3	9.394	01 30 02.36208	+21 52 57.8820	1050-00410663	022.509842	+21.882745			19.6	19.1	1954.739

%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****]
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b-r

%22>%5cFONT SIZE=-1magMflag

1 3.32901 30 02.74344+21 53 04.9200EO1229-0272102022.511431+21.88470017.39   2 36.09 18.8 0.7219.76   1 7.97 9.0 2.38* %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	4.855	01 30 02.89944	+21 53 06.6300	N32300112783	022.512081	+21.885175	1990.716	17.56	0.44	18.60	0.42	3	4.76	0.29

%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	4.491	01 30 02.87352	+21 53 06.6912	1118-0025291	022.511973	+21.885192	550	140	1972.2	0	0	4	20.17	17.84	17.81		17.06
2	5.296	01 30 02.93136	+21 53 06.6912	1118-0025292	022.512214	+21.885192	405	201	1981.2	0	0	4	19.02		17.35	17.45	18.54
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%205.296&%3cFONT%20COLOR=%27#CD5B45%27>01%2030%2002.93136&%3cFONT%20COLOR=%27#CD5B45%27>%2b21%2053%2006.6912&1118-0025292&022.512214&%2b21.885192&405&201&1981.2&%20%20%20%20%200&%20%20%20%20%200&4&19.02&%20&17.35&17.45&18.54%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6635ab679cbac&-out.add=.&-source=I/284/out&USNO-B1.0===1118-0025288&-out.orig=o' class='full'3 8.25701 30 02.39352+21 52 58.94041118-0025288022.509973+21.883039 919991965.7 -34 -30319.6819.6319.35     %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	4.489	01 30 02.873328	+21 53 06.69012	1118-0025408	YM	022.5119722	+21.8851917	B	0.0	0.0	0.0	0.0	17.810	B	17.970	Y	17.840	e	16.954	16.525	15.622
2	5.295	01 30 02.931336	+21 53 06.69012	1118-0025409	..	022.5122139	+21.8851917	B	0.0	0.0	0.0	0.0	17.350	B			17.450	B
3	8.258	01 30 02.393328	+21 52 58.94004	1118-0025405	..	022.5099722	+21.8830389	B	-34.0	2.0	-30.0	34.0	19.350	B			19.630	e

%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

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mag

Nmag
mag

Class

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e

1 4.85801 30 02.89968+21 53 06.6336NBNP002783022.512082+21.8851761990.71617.5618.6018.4318.053 4.76 0.29 %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	4.180	01 30 02.84976	+21 53 06.4464	022.511874	+21.885124	-1.9	-3.4	16.954	15.623	20.17	17.81	17.84		17.06	5	0
2	4.205	01 30 02.85120	+21 53 06.4068	022.511880	+21.885113	-32.9	-9.5	16.954	15.623	19.02	17.35		17.45	18.54	5	0
3	8.588	01 30 02.40744	+21 52 58.5480	022.510031	+21.882930	-35.7	-44.7			19.68	19.35	19.63			3	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 [****ClosingBrace(s)Inserted****]
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Fmag

%20

%22>%5cFONT SIZE=-1magBjmag
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 3.80001 30 02.82143+21 53 06.3600XPM 223-0018280022.511756+21.885100 -7.24 1.43 -6.92 1.8417.56218.60218.42618.05116.954 0.19916.526 0.24415.623 0.216 75380532219.718.0 35245.01182600M %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	4.037	01 30 02.84122	+21 53 06.8724	022.511838	+21.885242	0.031	0.021	17.810	0.400	17.840	0.400	18.395	0.085	17.148	0.114	2009.0400	2009.0400	-1.9	5.1	-3.4	5.1
2	4.204	01 30 02.85118	+21 53 06.4072	022.511880	+21.885113	0.109	0.099	18.602	0.300	17.562	0.300	17.778	0.400	16.923	0.500	1985.4400	1985.4400	-32.9	6.5	-9.5	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"	RAICRS deg	e_ mas	DEICRS deg	e_ mas	ID	Type	pmRA [****ClosingBrace(s)Inserted****]
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pmRA

%20

%22>%5cFONT SIZE=-1mas/yre_
(...)

pmDE
mas/yr

e_
(...)

Nobs

Dt
yr

Rmag
mag

Bmag
mag

Nmag
mag

Vmag
mag

Jmag
mag

Hmag
mag

Kmag
mag

1 4.91201 30 02.901678+21 53 07.47196022.51209031042.00+21.8854089 740.0064261+00027833 17.5 37.3 46.4 26.5 637.208 17.562 18.602 18.051 18.426 16.954 16.526 15.623 2 9.75901 30 02.346153+21 52 57.56817022.5097756 52.00+21.8826578 143.0064261+00027844 0.4 1.9 25.6 5.2 335.975 18.392 18.810   18.725       %0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	Class	Gmag mag	OMag mag	Bjmag mag	Fpgmag mag	Epgmag mag	Npgmag mag	Umag mag	Bmag mag	Vmag mag	umag mag	gmag mag	rmag mag	imag mag	zmag mag	ymag mag	Jmag mag	Hmag mag	Ksmag mag	Zmag mag	Ymag mag	W1mag mag	W2mag mag	W3mag mag	W4mag mag	FUVmag mag	NUVmag mag	a pix	e pix	PA pix
1	4.087	01 30 02.8217702023	+21 53 06.416388125	NBNP002783	022.51185346000	+21.88524294000	132300112783	2013.832	3		20.236500	18.602400	17.562000		18.051900				21.153	20.296	19.657	19.425	19.223	18.7719	16.954	16.526	15.623			15.097	14.704	11.963	8.905	21.376	20.889	4.759	0.287	3.6
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1	4.087	01 30 02.8217702023	+21 53 06.416388125	NBNP002783	022.51185346000	+21.88524294000	132300112783	2013.832	3		20.236500	18.602400	17.562000		18.051900				21.153	20.296	19.657	19.425	19.223	18.7719	16.954	16.526	15.623			15.097	14.704	11.963	8.905	21.376	20.889	4.759	0.287	3.6

%22>\Ahref='VizieR-5?-ref=VIZ6635ab679cbac&-out.add=.&-source=I/353/gsc242&-c=022.51288265000%20%2b21.88532033000,eq=ICRS,rs=2&-out.orig=o' class='full'2 7.52901 30 03.0918360000+21 53 07.153188000NBNP031014022.51288265000+21.88532033000 13230011310142013.2973                    20.661    20.419                    20.96321.090       3 7.94201 30 02.4158904000+21 52 59.184624000NBNP018837022.51006621000+21.88310684000 13230011188372014.6653                  25.74520.85020.23021.29120.51219.6231                  21.42120.814       4 9.59201 30 02.3535320424+21 52 57.639439709NBNP002784022.50983545000+21.88268952000 1323001127842013.7413  20.30280018.81020018.392600          21.38020.57820.55520.49920.39219.7098                       5.419 0.476126.5 %0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	2MASS	Jmag mag	e_Jmag mag	Hmag mag	e_Hmag mag	Kmag mag	e_Kmag mag	Qflg	Rflg	Bflg	Cflg	Xflg	Aflg
1	3.804	01 30 02.82168	+21 53 06.3528	022.511757	+21.885098	01300282+2153063	16.954	0.199	16.526	0.244	15.623	0.216	CDC	222	111	000	0	0

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