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	4.088	11 43 22.48272	+18 32 30.3432	1050-06567205	175.843678	+18.541762			18.7	19.0	1955.309
2	7.113	11 43 22.39944	+18 32 41.4816	1050-06567199	175.843331	+18.544856			15.5	16.2	1955.309

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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	1.210	11 43 22.45608	+18 32 35.6100	1085-0196886	175.843567	+18.543225	122	583	1986.0	0	0	4		18.63	16.77	18.46	18.26
2	2.788	11 43 22.49544	+18 32 31.6932	1085-0196888	175.843731	+18.542137	373	438	1979.4	12	38	5	19.76	19.51	17.46	18.38	18.74
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%202.788&%3cFONT%20COLOR=%27#CD5B45%27>11%2043%2022.49544&%3cFONT%20COLOR=%27#CD5B45%27>%2b18%2032%2031.6932&1085-0196888&175.843731&%2b18.542137&373&438&1979.4&%20%20%20%2012&%20%20%20%2038&5&19.76&19.51&17.46&18.38&18.74%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663fc4042b4039&-out.add=.&-source=I/284/out&USNO-B1.0===1085-0196889&-out.orig=o' class='full'3 3.65911 43 22.50552+18 32 30.83281085-0196889175.843773+18.5418983556951972.6 0 0219.94    18.27   4 6.98011 43 22.49352+18 32 27.45241085-0196887175.843723+18.5409594369991972.6 0 0220.52    19.14   5 7.23411 43 22.41552+18 32 41.62201085-0196885175.843398+18.544895 903951975.8 10 8416.2916.46  14.9415.86 %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	1.209	11 43 22.456008	+18 32 35.61000	1085-0200898	..	175.8435667	+18.5432250	B	0.0	0.0	0.0	0.0	16.770	B			18.460	B
2	2.791	11 43 22.495344	+18 32 31.68996	1085-0200900	..	175.8437306	+18.5421361	B	12.0	13.0	38.0	15.0	17.460	B			18.380	B
3	3.661	11 43 22.505328	+18 32 30.82992	1085-0200901	..	175.8437722	+18.5418972	B	0.0	0.0	0.0	0.0	19.940	o			18.270	B
4	6.982	11 43 22.493328	+18 32 27.44988	1085-0200899	..	175.8437222	+18.5409583	B	0.0	0.0	0.0	0.0	20.520	o			19.140	B
5	7.232	11 43 22.415328	+18 32 41.61984	1085-0200897	..	175.8433972	+18.5448944	B	10.0	2.0	8.0	12.0	16.290	o			14.940	B

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%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>Full

%22> _r
arcsec _RAJ2000
"h:m:s" _DEJ2000
"d:m:s"GSC2.3

RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 5.46911 43 22.44408+18 32 39.8724N6DI006914175.843517+18.5444092000.337      17.703 2.90 0.33 %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	1.488	11 43 22.45344	+18 32 35.8908	175.843556	+18.543303	-5.4	2.3				16.77	18.63	18.46	18.26	4	0
2	2.788	11 43 22.48848	+18 32 31.6716	175.843702	+18.542131	10.0	30.8			19.76	17.46	19.51	18.38	18.74	5	0
3	4.121	11 43 22.51632	+18 32 30.3936	175.843818	+18.541776	7.1	-28.1			19.94			18.27		2	0
4	5.962	11 43 22.50600	+18 32 28.4964	175.843775	+18.541249	9.4	20.5			20.52			19.14		2	0
5	7.166	11 43 22.41936	+18 32 41.5572	175.843414	+18.544877	7.5	1.1			16.29		16.46	14.94	15.86	4	0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 [****ClosingBrace(s)Inserted****]
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e_RAJ2000

%20

%22>%5cFONT SIZE=-1(...)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_
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pmDE
mas/yr

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1 1.48811 43 22.45348+18 32 35.8913175.843556+18.543303 0.115 0.11516.770 0.40018.460 0.40017.998 0.40019.212 0.5001985.80001985.8000 -5.4 6.5 2.3 6.5 2 2.78711 43 22.48844+18 32 31.6718175.843702+18.542131 0.103 0.10317.460 0.40018.380 0.40018.090 0.40018.726 0.5001979.25001979.2500 10.0 5.2 30.8 5.2 3 4.81211 43 22.43299+18 32 39.2099175.843471+18.544225 0.012 0.01616.290 0.40014.940 0.40017.353 0.08217.035 0.1122005.35002005.3500 7.5 5.6 1.1 5.6 4 5.96211 43 22.50601+18 32 28.4961175.843775+18.541249 0.163 0.16320.520 0.40019.140 0.40019.381 0.40018.294 0.5001972.69001972.6900 9.4 9.4 20.5 9.4 %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	4.845	11 43 22.5442416000	+18 32 29.750064000	N6DI017607	175.84393434000	+18.54159724000	1200101217607	2010.088	3										24.805	21.407	19.916	22.883	22.245
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1	4.845	11 43 22.5442416000	+18 32 29.750064000	N6DI017607	175.84393434000	+18.54159724000	1200101217607	2010.088	3										24.805	21.407	19.916	22.883	22.245

%22>\Ahref='VizieR-5?-ref=VIZ663fc4042b4039&-out.add=.&-source=I/353/gsc242&-c=175.84346845000%20%2b18.54424792000,eq=ICRS,rs=2&-out.orig=o' class='full'2 4.89511 43 22.4297432540+18 32 39.133822184N6DI006914175.84346845000+18.54424792000 1200101269142012.8143  17.850700      17.695100      17.85618.98319.14919.35819.995                         2.900 0.333 80.9 3 7.99611 43 22.4056320000+18 32 42.375840000N6DI037350175.84335680000+18.54510440000 12001012373502010.5604                                        14.91614.77411.328 8.194           %0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	SN	n_	Gname	RAG "h:m:s"	DEG "d:m:s"	Gi deg	GVhel km/s	Gtype	mag mag	l_	Type	RA2000 "h:m:s"	DE2000 "d:m:s"	Disc
1	0.246	11 43 22.46000	+18 32 34.6000	1965C		ANON	11 43 18	+18 31.0			.S....	18.0	>		11 43 22.460	+18 32 34.60	Zwicky

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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	[****ClosingBrace(s)Inserted****]
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mag&%">\BegDIVclass='sort-down ' </A>dece_
magzmag
mag

e_
mag

RA_ICRS
deg

DE_ICRS
deg

ObsDate
yr

Q

1 4.36311 43 22.49616+18 32 30.091213J114322.49+183230.0    21.007 0.62521.488 0.50620.780 0.33419.723 0.20722.502 6.011175.843734+18.5416922005.35603 2 4.77911 43 22.42176+18 32 39.166823J114322.42+183239.1    19.760 0.05219.430 0.01419.424 0.01919.850 0.03819.593 0.096175.843424+18.5442132005.42693 3 4.83111 43 22.43664+18 32 39.231613J114322.43+183239.2    17.827 0.03017.315 0.01017.375 0.01217.217 0.01617.424 0.069175.843486+18.5442312005.35603 %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"	WISE	RAJ2000 deg	DEJ2000 deg	eeMaj arcsec	eeMin arcsec	Im	W1mag mag	e_ mag	W2mag mag	e_ mag	W3mag mag	e_ mag	W4mag mag	e_ mag	Jmag mag	Hmag mag	Kmag mag	ccf	ex	var	d2M arcsec	2M
1	7.955	11 43 22.41692	+18 32 42.3453	J114322.41+183242.3	175.843404	+18.545096	0.279	0.197	Im	14.935	0.046	14.912	0.098	11.438	0.184	8.260					0000	0	nnnn		2M

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 [****ClosingBrace(s)Inserted****]
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%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_DEJ2000

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%22>%5cFONT SIZE=-1"d:m:s"AllWISE

RAJ2000
deg

DEJ2000
deg

Im

W1mag
mag

e_
mag

W2mag
mag

e_
mag

W3mag
mag

e_
mag

W4mag
mag

e_
mag

Jmag
mag

e_
mag

Hmag
mag

e_
mag

Kmag
mag

e_
mag

ccf

ex

var

pmRA
mas/yr

e_
(...)

pmDE
mas/yr

e_
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qph

d2M
arcsec

2M

1 7.99611 43 22.405643+18 32 42.37578J114322.40+183242.3175.8433568+18.5451044Im14.916 0.04214.774 0.07411.328 0.181 8.194              00002nnnn        AABU  2M %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	objID	f_objID	Qual	e_RAJ2000 (...)	e_DEJ2000 arcsec	Epoch d	Ns	Nd	gmag mag	e_ mag	gKmag mag	e_ mag	gFlags	rmag mag	e_ mag	rKmag mag	e_ mag	rFlags	imag mag	e_ mag	iKmag mag	e_ mag	iFlags	zmag mag	e_ mag	zKmag mag	e_ mag	zFlags [****ClosingBrace(s)Inserted****]
zFlags ">
	ymag mag	e_ mag	yKmag mag	e_ mag	yFlags
1	4.845	11 43 22.54424160	+18 32 29.7500640	175.843934340	+18.541597240	130251758440500429	310456320	37	0.0476	0.0476	55449.088194440	0	3	21.4074	0.1005	19.9687	0.0648	16777496	19.9160	0.0639	18.4963	0.0465	16777488					0					0					0
2	4.895	11 43 22.43242800	+18 32 39.2925120	175.843468450	+18.544247920	130251758434423654	436527104	52	0.0091	0.0214	56193.814143520	5	24	18.9826	0.0176	19.1534	0.0516	115000	19.1491	0.0125	19.2595	0.0205	115000	19.3576	0.0384	18.7689	0.0000	115000	19.9953	0.0363	19.5752	0.2092	16892216					114720

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