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	4.349	12 10 44.79000	+44 56 01.7232	1275-08045870	182.686625	+44.933812			17.8	18.1	1955.161
2	4.399	12 10 44.00016	+44 56 02.2128	1275-08045829	182.683334	+44.933948			16.4	15.2	1955.161
3	8.193	12 10 43.63152	+44 56 02.2020	1275-08045811	182.681798	+44.933945			17.5	16.1	1955.161

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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 [****ClosingBrace(s)Inserted****]
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b-r

%22>%5cFONT SIZE=-1magMflag

1 4.38212 10 44.00208+44 56 02.2200EO1338-0254579182.683342+44.93395014.08   1 56.63 30.1 0.7115.77   1 18.77 28.4 1.69   %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	3.803	12 10 44.05488	+44 56 02.0688	N13000033104	182.683562	+44.933908	1996.208	14.33	0.23	15.53	0.28	3	11.58	0.71

%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	2.803	12 10 44.63136	+44 56 01.9032	1349-0231075	182.685964	+44.933862	594	64	1980.8	28	-10	3	18.42			16.37	16.33
2	3.654	12 10 44.07936	+44 56 02.3028	1349-0231072	182.683664	+44.933973	154	229	1977.5	30	4	5	17.03	15.35	15.67	15.06	15.24
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%203.654&%3cFONT%20COLOR=%27#CD5B45%27>12%2010%2044.07936&%3cFONT%20COLOR=%27#CD5B45%27>%2b44%2056%2002.3028&1349-0231072&182.683664&%2b44.933973&154&229&1977.5&%20%20%20%2030&%20%20%20%20%204&5&17.03&15.35&15.67&15.06&15.24%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6643267127dbe8&-out.add=.&-source=I/284/out&USNO-B1.0===1349-0231077&-out.orig=o' class='full'3 4.44312 10 44.79888+44 56 01.73041349-0231077182.686662+44.933814274 931974.4 0 0418.4018.34  16.8618.13 4 8.60512 10 43.59480+44 56 02.36041349-0231069182.681645+44.9339894721591974.4 0 0418.0516.29  15.2416.08 %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	2.801	12 10 44.631336	+44 56 01.89996	1349-0234573	..	182.6859639	+44.9338611	B	28.0	22.0	-10.0	2.0	18.420	o			16.370	B
2	3.653	12 10 44.079336	+44 56 02.29992	1349-0234570	YM	182.6836639	+44.9339722	B	30.0	5.0	4.0	7.0	17.990	Y	17.140	Y	15.060	B	15.862	15.182	14.701
3	4.440	12 10 44.798664	+44 56 01.73004	1349-0234575	..	182.6866611	+44.9338139	B	0.0	0.0	0.0	0.0	18.400	o			16.860	B
4	8.606	12 10 43.594656	+44 56 02.36004	1349-0234567	..	182.6816444	+44.9339889	B	0.0	0.0	0.0	0.0	18.050	o			15.240	B

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20This%20version%20of%20the%20%0a%3cB%3eGSC-II%0ahas%20no%20proper%20motions,%20but%20the%20limits%20on%20brightness%20which%20existed%20on%0a%20%28F<18.5,%20B_j<19.5%29%20were%20removed.%0a%25The%20data%20are%20%3cB%3e%3cFONT%20COLOR=%27#0000CD%27>copyrighted,%20check%0a%25the%20%3cB%3edata%20use%20Policy.%0a%3cP%3e%0a

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

%20

%22>%5cFONT SIZE=-1"h:m:s" _DEJ2000
"d:m:s"

GSC2.3

RAJ2000
deg

DEJ2000
deg

Epoch
yr

Fmag
mag

jmag
mag

Vmag
mag

Nmag
mag

Class

a
pix

e

1 3.80512 10 44.05488+44 56 02.0724N5J7003104182.683562+44.9339091996.20814.3315.5315.8114.733 11.58 0.71 %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	2.411	12 10 44.59968	+44 56 01.6944	182.685832	+44.933804	12.0	-13.8			18.42			16.37	16.33	3	0
2	3.544	12 10 44.07312	+44 56 01.8348	182.683638	+44.933843	20.8	-7.8	15.862	14.702	17.03	15.67	15.35	15.06	15.24	6	0
3	4.351	12 10 44.79240	+44 56 01.6152	182.686635	+44.933782	-4.7	-1.9			18.40		18.34	16.86	18.13	4	0
4	9.201	12 10 43.53768	+44 56 02.3568	182.681407	+44.933988	-21.1	0.6			18.05		16.29	15.24	16.08	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 [****ClosingBrace(s)Inserted****]
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pmRAx

%20

%22>%5cFONT SIZE=-1mas/yrpmDEx
mas/yr

Fmag
mag

Bjmag
mag

Vmag
mag

Nmag
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 3.50612 10 44.07480+44 56 01.7662XPM 269-0370612182.683645+44.933824 14.37 -7.05 14.54 -6.6614.33215.53215.80614.73015.862 0.11115.183 0.14214.702 0.122 97762934916.415.2 17144.99484200M %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	2.410	12 10 44.59963	+44 56 01.6941	182.685832	+44.933804	0.133	0.133	18.420	0.400	16.370	0.400	16.547	0.400	15.052	0.500	1980.8200	1980.8200	12.0	7.3	-13.8	7.3
2	3.731	12 10 44.05237	+44 56 01.7503	182.683552	+44.933820	0.021	0.009	15.532	0.300	14.332	0.300	16.399	0.080	15.353	0.110	2003.2200	2003.2200	20.8	4.1	-7.8	4.1
3	4.351	12 10 44.79240	+44 56 01.6147	182.686635	+44.933782	0.115	0.115	18.400	0.400	16.860	0.400	17.101	0.400	15.910	0.500	1974.4100	1974.4100	-4.7	6.0	-1.9	6.0
4	9.201	12 10 43.53767	+44 56 02.3571	182.681407	+44.933988	0.115	0.115	18.050	0.400	15.240	0.400	15.102	0.400	13.245	0.500	1974.4100	1974.4100	-21.1	6.0	0.6	6.0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	URAT1	RAICRS deg	DEICRS [****ClosingBrace(s)Inserted****]
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DEICRS

%20

%22>%5cFONT SIZE=-1degEpoch
yr

f.mag
mag

e_
mag

pmRA
mas/yr

pmDE
mas/yr

Jmag
mag

Hmag
mag

Kmag
mag

Bmag
mag

Vmag
mag

gmag
mag

rmag
mag

imag
mag

1 3.80312 10 44.074379+44 56 01.74703675-221921182.6835333+44.93384672013.66716.866 0.029 -20.5 7.415.86215.18314.70218.21017.606       %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	3.607	12 10 44.069395	+44 56 01.91511	182.6836225	252.00	+44.9338653	187.00	56323+0003104	4	14.3	24.0	-8.1	17.8	4	12.037	14.332	15.532	14.730	15.806	15.862	15.183	14.702

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