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	0.932	02 32 09.94200	-06 48 57.5532	0825-00591376	038.041425	-06.815987			18.9	18.4	1954.903

%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	0.624	02 32 09.91872	-06 48 57.4524	0831-0037548	038.041328	-06.815959	95	45	1976.5	0	0	5	19.76	19.31	20.21	19.07	18.85
2	1.828	02 32 09.91680	-06 48 55.9512	0831-0037547	038.041320	-06.815542	203	885	1969.9	-16	26	3	20.44	19.23			18.96
3	5.581	02 32 10.20600	-06 49 00.4512	0831-0037552	038.042525	-06.816792	431	510	1997.3	0	0	2			25.53		18.60
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%3cEM%3e3&%3cFONT%20COLOR=%27#CD5B45%27>%205.581&%3cFONT%20COLOR=%27#CD5B45%27>02%2032%2010.20600&%3cFONT%20COLOR=%27#CD5B45%27>-06%2049%2000.4512&0831-0037552&038.042525&-06.816792&431&510&1997.3&%20%20%20%20%200&%20%20%20%20%200&2&%20&%20&25.53&%20&18.60%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	0.624	02 32 09.918672	-06 48 57.44988	0831-0037667	..	038.0413278	-06.8159583	B	0.0	0.0	0.0	0.0	20.210	B			19.070	B
2	1.828	02 32 09.916656	-06 48 55.95012	0831-0037666	..	038.0413194	-06.8155417	B	-16.0	5.0	26.0	24.0	20.440	o			19.230	e
3	5.581	02 32 10.206000	-06 49 00.45012	0831-0037671	..	038.0425250	-06.8167917	B	0.0	0.0	0.0	0.0	25.000	B

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.3 [****ClosingBrace(s)Inserted****]
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GSC2.3

%22>RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 0.49502 32 09.89736-06 48 57.2724S0F9000332038.041239-06.8159091995.64118.7119.77  18.593 2.89 0.17 %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	0.858	02 32 09.93528	-06 48 57.4488	038.041397	-06.815958	13.3	-3.8			19.76	20.21	19.31		18.85	4	0
2	1.873	02 32 09.93432	-06 48 56.0052	038.041393	-06.815557	-3.3	14.6			20.44		19.23		18.96	3	0

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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 [****ClosingBrace(s)Inserted****]
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magG

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yr

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1 0.58602 32 09.91671-06 48 57.4785038.041320-06.815966 0.024 0.02919.771 0.30018.708 0.30019.062 0.08518.196 0.1142009.00002009.0000 -3.3 6.3 14.6 6.3 2 0.85702 32 09.93525-06 48 57.4493038.041397-06.815958 0.115 0.11520.210 0.40019.310 0.40019.507 0.40018.750 0.5001971.77001971.7700 13.3 6.6 -3.8 6.6 %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	0.513	02 32 09.914217	-06 48 57.62205	038.0413092	43.00	-06.8160061	80.00	33317+0000332	0	-6.9	1.8	-11.2	3.3	8	44.887	18.708	19.771	18.588

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	Class	Gmag [****ClosingBrace(s)Inserted****]
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Gmag

%20

%22>%5cFONT SIZE=-1magOMag
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1 0.48702 32 09.8900331262-06 48 57.303252795S0F9000332038.04123687744-06.81591033936 200202113321995.6403  20.32770019.77120018.708100  18.588500      21.06319.62019.13718.85518.801   17.782 16.948 16.485            21.28221.068 2.887 0.171115.2 2 0.51102 32 09.9096384000-06 48 57.434112000S0F9044861038.04129016000-06.81595392000 20020211448612012.1363                    20.20719.91319.88919.96319.6039 17.477 17.010 16.317    16.39415.99512.269 8.736           %0a%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20SDSS%20is%20also%20available%20from%20http://www.sdss.org/%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	mode	cl	SDSS	m_	zsp	umag mag	e_ mag	gmag mag	e_ mag	rmag mag	e_ mag	imag mag	e_ mag	zmag mag	e_ mag	RA_ICRS deg	DE_ICRS deg	ObsDate yr	Q
1	0.513	02 32 09.91182	-06 48 57.4696	2	3	J023209.91-064857.4			20.437	0.158	19.357	0.019	18.875	0.019	18.561	0.020	18.549	0.080	038.041297	-06.815966	2008.0005	1
2	0.517	02 32 09.90908	-06 48 57.3912	1	3	J023209.90-064857.3			20.476	0.105	19.603	0.018	19.100	0.022	18.782	0.023	18.716	0.070	038.041284	-06.815942	2006.8808	3

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