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	0.936	16 10 42.82008	+33 10 19.8912	1200-07775161	242.678417	+33.172192			18.3	16.8	1954.485

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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	0.637	16 10 42.84816	+33 10 19.7616	EO1093-0254434	242.678534	+33.172156	17.21		1	6.57	9.9	0.28	19.39		1	4.05	8.9	2.18
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.637&%3cFONT%20COLOR=%27#CD5B45%27>16%2010%2042.84816&%3cFONT%20COLOR=%27#CD5B45%27>%2b33%2010%2019.7616&EO1093-0254434&242.678534&%2b33.172156&17.21&%20&%201&%20%20%206.57&%20%20%209.9&%200.28&19.39&%20&%201&%20%20%204.05&%20%20%208.9&%20%202.18&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6622d2dc29a0e4&-out.add=.&-source=I/267/out&APM-ID===EO0071-0387599&-out.orig=o' class='full'2 1.76216 10 42.75600+33 10 19.7004EO0071-0387599242.678150+33.17213917.15  -1 2.71 9.8 0.2519.47  -1 1.80 7.4 2.32   %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	1.167	16 10 42.81456	+33 10 19.4304	N132231312134	242.678394	+33.172064	1994.368	16.50	0.42	18.60	0.41	3	5.69	0.49

%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	1.404	16 10 42.78888	+33 10 19.5528	1231-0278857	242.678287	+33.172098	48	102	1976.7	0	0	5	19.54	18.10	17.44	16.32	15.76

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">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	1.407	16 10 42.788664	+33 10 19.54992	1231-0282171	YM	242.6782861	+33.1720972	B	0.0	0.0	0.0	0.0	17.440	B	17.290	Y	16.320	B	16.405	15.487	15.141

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

%22>%5cFONT SIZE=-1magNmag
magClass

a
pixe

1 1.16516 10 42.81456+33 10 19.4340N62F012134242.678394+33.1720651994.36816.5018.6018.0316.473 5.69 0.49 %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	1.131	16 10 42.81168	+33 10 19.5744	242.678382	+33.172104	2.1	1.2	16.405	15.141	19.54	17.44	18.10	16.32	15.76	6	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	Nmag mag	Jmag mag	[****ClosingBrace(s)Inserted****]
">

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

Bmag
magRmag
magFld

dT
yrfg

fs

M

1 0.88716 10 42.83134+33 10 19.6246XPM 246-0364673242.678464+33.172118 1.98 -3.32 2.14 -2.8116.49618.59618.02616.46816.405 0.11715.488 0.13315.141 0.119 21150367918.316.8 27643.77095000M %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	1.354	16 10 42.79249	+33 10 19.5748	242.678302	+33.172104	0.010	0.010	18.596	0.300	16.496	0.300	17.517	0.081	16.339	0.111	2003.4000	2003.4000	2.1	4.0	1.2	4.0

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