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	0.922	08 27 05.82936	-00 15 27.8028	0825-06315458	126.774289	-00.257723			17.8	17.2	1954.969

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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	0.986	08 27 05.83752	-00 15 27.8424	EO1305-0222162	126.774323	-00.257734	17.10		1	15.41	11.7	0.43	18.13		1	14.13	11.1	1.03
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.986&%3cFONT%20COLOR=%27#CD5B45%27>08%2027%2005.83752&%3cFONT%20COLOR=%27#CD5B45%27>-00%2015%2027.8424&EO1305-0222162&126.774323&-00.257734&17.10&%20&%201&%20%2015.41&%20%2011.7&%200.43&18.13&%20&%201&%20%2014.13&%20%2011.1&%20%201.03&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663a38c13c5d15&-out.add=.&-source=I/267/out&APM-ID===EO1305-0222117&-out.orig=o' class='full'2 7.34608 27 06.30936-00 15 26.5932EO1305-0222117126.776289-00.25738719.19  -1 1.04 4.7 0.0721.46   1 5.19 4.7 2.27   %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	0.681	08 27 05.82816	-00 15 27.5616	S102012110804	126.774284	-00.257656	1991.050	17.39	0.33	18.40	0.30	3	4.99	0.44

%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	0.501	08 27 05.80272	-00 15 27.3204	0897-0165945	126.774178	-00.257589	368	91	1975.8	-2	10	5	18.39	16.90	18.57	17.08	16.82
2	6.673	08 27 06.26280	-00 15 26.2512	0897-0165948	126.776095	-00.257292	52	416	1981.0	-42	32	4	20.63		20.66	18.69	17.47
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%206.673&%3cFONT%20COLOR=%27#CD5B45%27>08%2027%2006.26280&%3cFONT%20COLOR=%27#CD5B45%27>-00%2015%2026.2512&0897-0165948&126.776095&-00.257292&%2052&416&1981.0&%20%20%20-42&%20%20%20%2032&4&20.63&%20&20.66&18.69&17.47%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	0.501	08 27 05.802672	-00 15 27.32004	0897-0170412	Y.	126.7741778	-00.2575889	B	-2.0	12.0	10.0	3.0	18.260	Y			17.080	B
2	6.671	08 27 06.262656	-00 15 26.25012	0897-0170415	..	126.7760944	-00.2572917	B	-42.0	2.0	32.0	17.0	20.660	B			18.690	B

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.3	RAJ2000 deg	DEJ2000 deg	Epoch yr	[****ClosingBrace(s)Inserted****]
">

yr&%">\BegDIVclass='sort-down ' </A>decFmag
magjmag
mag

Vmag
magNmag
magClass

a
pixe

1 0.67808 27 05.82840-00 15 27.5580S3KP010804126.774285-00.2576551991.05017.3918.08  17.393 4.99 0.44 2 7.46408 27 06.31728-00 15 26.6220S3KP010805126.776322-00.2573951991.05019.37    18.503 2.73 0.22 %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	0.717	08 27 05.79000	-00 15 27.4500	126.774125	-00.257625	-6.6	6.1			18.39	18.57	16.90	17.08	16.82	5	0
2	6.680	08 27 06.26304	-00 15 26.2116	126.776096	-00.257281	-42.8	32.4			20.63	20.66		18.69	17.47	4	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

%20

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

magGrvs
mag

e_
mag

alphaEpoch
yr

deltaEpoch
yr

pmRA
mas/yr

e_
(...)

pmDE
mas/yr

e_
(...)

1 1.12408 27 05.74694-00 15 27.1431126.773946-00.257540 0.038 0.02218.078 0.30017.388 0.30017.760 0.08116.838 0.1112000.17002000.1700 -6.6 6.0 6.1 6.0 2 7.60308 27 06.32607-00 15 26.4676126.776359-00.257352 0.021 0.01620.660 0.40019.368 0.30019.282 0.09217.806 0.1192000.17002000.1700 -42.8 7.6 32.4 7.6 %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"	RA_ICRS deg	DE_ICRS deg	rmag mag	pmRA mas/yr	e_ (...)	pmxRA mas/yr	e_ (...)	Chi2RA	pmGRA mas/yr	pmDE mas/yr	e_ (...)	pmxDE mas/yr	e_ (...)	Chi2DE	pmGDE mas/yr	Nobs	Flag	PS1	Gaia	DR9+DR12	Sloan	2M
1	0.573	08 27 05.8149157866	-00 15 27.517758903	126.77422936827	-00.25762775360	19.425562	0.199	15.200	-20.351	18.624	3.58219e-01		5.785	14.275	17.253	15.842	1.14515e-01		6	0	PS1	Gaia	DR9+DR12	Sloan	2M

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