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	0.375	08 51 24.42216	-41 47 46.4208	0450-07645066	132.851759	-41.796228			20.2	17.7	1981.531
2	7.609	08 51 23.73288	-41 47 45.3120	0450-07644610	132.848887	-41.795920			20.0	17.8	1981.531

%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%2fgalaxy%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:%2f%2fwww.nofs.navy.mil%2fdata%2ffchpix%2f%20%3cBR%3e%0a%3cB%3e%3cFONT%20COLOR=%27#EE0000%27>%20Note%20that%20the%20star%2fgalaxy%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	0.445	08 51 24.44400	-41 47 46.3020	0482-0171043	132.851850	-41.796195	154	56	1983.9	0	0	4		18.43	21.45	19.30	16.74
2	7.548	08 51 23.73888	-41 47 45.2616	0482-0171030	132.848912	-41.795906	30	112	1985.1	0	0	4		19.20	19.90	19.27	18.38
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%207.548&%3cFONT%20COLOR=%27#CD5B45%27>08%2051%2023.73888&%3cFONT%20COLOR=%27#CD5B45%27>-41%2047%2045.2616&0482-0171030&132.848912&-41.795906&%2030&112&1985.1&%20%20%20%20%200&%20%20%20%20%200&4&%20&19.20&19.90&19.27&18.38%3cBR%3e">\EndTABLESORT

Note: The Naval Observatory Merged Astrometric Dataset (NOMAD) contains astrometric and photometric data for over 1 billion stars derived from the Hipparcos (I/239), Tycho-2 (I/259), UCAC2 (I/289), and USNO-B1.0 (I/284) catalogs for astrometry and optical photometry, supplemented by 2MASS (II/246) near-infrared photometry.
An efficient remote query program findnomad1 is available in the cdsclient package, for Unix/Linux platforms

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	0.444	08 51 24.444000	-41 47 46.29984	0482-0176254	.M	132.8518500	-41.7961944	B	0.0	0.0	0.0	0.0	21.450	B			19.300	B	15.226	14.317	13.643
2	7.550	08 51 23.738664	-41 47 45.26016	0482-0176241	.M	132.8489111	-41.7959056	B	0.0	0.0	0.0	0.0	19.900	B			19.270	B	16.559	15.461	15.217

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

Epoch

%22>%5cFONT SIZE=-1yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 0.39308 51 24.37752-41 47 46.2228S67F007096132.851573-41.7961731991.26819.0121.12  16.960 2.11 0.04 2 8.37508 51 23.66760-41 47 44.9628S67F007099132.848615-41.7958231991.26818.6520.93  17.443 2.20 0.05 %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	0.241	08 51 24.41808	-41 47 46.2948	132.851742	-41.796193	-4.7	3.0	15.226	13.643		21.45	18.43	19.30	16.74	5	0
2	7.825	08 51 23.71368	-41 47 45.2868	132.848807	-41.795913	-13.7	-0.2	16.559	15.217		19.90	19.20	19.27	18.38	5	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	Vmag mag	[****ClosingBrace(s)Inserted****]
">

mag&%">\BegDIVclass='sort-down ' </A>decNmag
magJmag
mage_
magHmag
mage_
magKmag
mage_
mag2Mkey

Bmag
magRmag
magFld

dT
yrfg

fs

M

1 0.29108 51 24.40945-41 47 46.3630XPM 096-0256463132.851706-41.796212 1.57 -0.28 0.68 0.0319.01221.120  16.95815.226 0.05014.317 0.05313.643 0.045 29566488520.217.7 31317.63847400M 2 7.91308 51 23.70506-41 47 45.3803XPM 096-0256431132.848771-41.795939 -7.53 -7.29 -8.42 -6.9718.64520.929  17.43716.559 0.16015.461 0.12315.217 0.169 29566488320.017.8 31317.63847400M %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	0.241	08 51 24.41803	-41 47 46.2952	132.851742	-41.796193	0.066	0.066	21.120	0.300	19.012	0.300	19.175	0.400	17.647	0.500	1994.2000	1994.2000	-4.7	8.3	3.0	8.3
2	7.826	08 51 23.71365	-41 47 45.2872	132.848807	-41.795913	0.087	0.087	20.929	0.300	18.645	0.300	18.755	0.400	17.137	0.500	1991.1400	1991.1400	-13.7	9.9	-0.2	9.9

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

%20

%22>%5cFONT SIZE=-1mas/yrpmDE
mas/yr

RADEcor

Dup

<FG>
e-/s

e_
e-/s

<Gmag>
mag

Var

1 0.10308 51 24.416645186-41 47 46.14198451132.8517360216 4.854-41.7961505513 7.9805524591693835414656      -0.9950 6.0579e+02 4.8604e+0018.569NOT_AVAILABLE 2 7.92608 51 23.707313943-41 47 45.02767124132.8487804748 4.936-41.7958410198 8.1115524591693835415040      -0.9950 5.9232e+02 3.9136e+0018.593NOT_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	0.215	08 51 24.419866056	-41 47 46.25542968	132.8517494419	-41.7961820638	6156013304220956383		-2.404	7.549	15.226	14.317	13.643		21.45	18.43	19.30	16.74	5524591693835414656	18.569
2	7.779	08 51 23.718983376	-41 47 45.16987740	132.8488290974	-41.7958805215	6156013682741112130		-8.703	9.462	16.559	15.461	15.217		19.90	19.20	19.27	18.38	5524591693835415040	18.593

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