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	0.424	04 50 32.72688	-09 14 31.3800	0750-01120239	072.636362	-09.242050			18.3	17.9	1953.866
2	9.414	04 50 32.16672	-09 14 26.7504	0750-01120191	072.634028	-09.240764			19.4	18.9	1953.866

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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	0.314	04 50 32.69808	-09 14 31.4160	S02322228693	072.636242	-09.242060	1990.893	17.36	0.44	18.42	0.42	0	3.40	0.07

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

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%22> Full

">  _r
arcsec _RAJ2000
"h:m:s" _DEJ2000
"d:m:s"USNO-B1.0

RAJ2000
degDEJ2000
dege_RAJ2000
mase_DEJ2000
masEpoch
yrpmRA
mas/yrpmDE
mas/yrNdet

B1mag
magR1mag
magB2mag
magR2mag
magImag
mag 1 0.44904 50 32.67744-09 14 31.68240807-0048671072.636156-09.242134 941361973.8 -14 -6519.1717.9418.3817.0716.92 2 9.46104 50 32.13936-09 14 27.37320807-0048667072.633914-09.240937 523521973.8 -6 -14520.6819.2220.4618.7818.41 %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	0.451	04 50 32.677344	-09 14 31.67988	0807-0049058	YM	072.6361556	-09.2421333	B	-14.0	3.0	-6.0	4.0	18.260	Y	17.970	Y	17.070	B	16.681	15.641	14.880
2	9.463	04 50 32.139336	-09 14 27.36996	0807-0049054	..	072.6339139	-09.2409361	B	-6.0	1.0	-14.0	11.0	20.460	B			18.780	B

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

%20

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

jmag
mag

Vmag
mag

Nmag
mag

Class

a
pix

e

1 0.31904 50 32.69832-09 14 31.4088S2AY008693072.636243-09.2420581990.89317.3618.42  17.143 3.40 0.07 2 9.62104 50 32.14104-09 14 26.9880S2AY008700072.633921-09.2408301990.89319.0020.72  18.523 2.27 0.06 %0a%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	0.204	04 50 32.72088	-09 14 31.7580	072.636337	-09.242155	3.6	-10.4	16.682	14.880	19.17	18.38	17.94		16.92	5	0
2	9.391	04 50 32.14128	-09 14 27.4704	072.633922	-09.240964	-0.5	-21.7			20.68	20.46	19.22		18.41	4	0

%0a%0a

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

%20

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

Jmag
mag

e_
mag

Hmag
mag

e_
mag

Kmag
mag

e_
mag

2Mkey

Bmag
mag

Rmag
mag

Fld

dT
yr

fg

fs

M

1 0.28604 50 32.72690-09 14 31.7398XPM 161-0043967072.636362-09.242150 3.48 -9.82 2.92 -9.7017.36318.424  17.14116.682 0.13715.642 0.10514.880 0.115 10657455918.317.9 71744.91323800M %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	0.203	04 50 32.72083	-09 14 31.7578	072.636337	-09.242155	0.074	0.074	18.380	0.400	17.940	0.400	18.043	0.400	17.625	0.500	1986.5500	1986.5500	3.6	4.2	-10.4	4.2
2	0.419	04 50 32.68885	-09 14 31.3849	072.636204	-09.242051	0.400	0.400	18.424	0.300	17.363	0.300	17.581	0.400	16.711	0.500	1990.8900	1990.8900	-15.1	3.7	3.4	3.7
3	9.392	04 50 32.14125	-09 14 27.4702	072.633922	-09.240964	0.115	0.115	20.460	0.400	19.220	0.400	19.455	0.400	18.462	0.500	1969.5800	1969.5800	-0.5	7.3	-21.7	7.3
4	9.772	04 50 32.13100	-09 14 26.9449	072.633879	-09.240818	0.400	0.400	20.717	0.300	19.000	0.300	19.230	0.400	17.929	0.500	1990.8900	1990.8900	-16.1	9.7	5.4	7.8

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAICRS deg	e_ mas	DEICRS [****ClosingBrace(s)Inserted****]
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DEICRS

%20

%22>%5cFONT SIZE=-1dege_
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 0.25704 50 32.690678-09 14 31.64884072.6362112 82.00-09.2421247 54.0035754+00086930 -3.4 3.2 -5.2 2.1 846.078 17.363 18.424 17.141   16.682 15.642 14.880 2 9.81304 50 32.129917-09 14 26.89017072.6338747 139.00-09.2408028 162.0035754+00087000 1.4 6.8 -0.2 7.9 746.075 19.000 20.717 18.520         %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 mas/yr	pmDE mas/yr	RADEcor	Dup	<FG> e-/s	e_ e-/s	<Gmag> mag	Var
1	0.021	04 50 32.706709796	-09 14 31.70904910	072.6362779575	0.776	-09.2421414025	0.821	3184870120028138880				-0.579	1	6.7490e+02	9.3488e+00	18.452	NOT_AVAILABLE
2	9.533	04 50 32.152439296	-09 14 26.87133084	072.6339684971	17.536	-09.2407975919	18.494	3184870188747616128				0.394	0	1.1637e+02	7.1638e+00	20.360	NOT_AVAILABLE

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