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	7.616	23 30 44.96280	+18 40 53.9904	1050-20694943	352.687345	+18.681664			18.4	17.8	1954.652

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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	2.393	23 30 45.44616	+18 40 54.5412	EO0320-0215496	352.689359	+18.681817	19.83		-1	1.84	3.6	0.29	21.61	L	0			1.78
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%202.393&%3cFONT%20COLOR=%27#CD5B45%27>23%2030%2045.44616&%3cFONT%20COLOR=%27#CD5B45%27>%2b18%2040%2054.5412&EO0320-0215496&352.689359&%2b18.681817&19.83&%20&-1&%20%20%201.84&%20%20%203.6&%200.29&21.61&L&%200&%20&%20&%20%201.78&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ664287c52b94cb&-out.add=.&-source=I/267/out&APM-ID===EO1182-0179791&-out.orig=o' class='full'2 7.60323 30 44.96736+18 40 54.1920EO1182-0179791352.687364+18.68172017.22   1 4.33 8.6 0.2718.36   1 9.20 11.6 1.14   3 7.71723 30 44.96736+18 40 54.5916EO0320-0215497352.687364+18.68183117.46   1 4.05 7.9 0.1518.90  -1 1.07 8.3 1.45   %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	7.379	23 30 44.97576	+18 40 53.7276	N00323139956	352.687399	+18.681591	1990.702	17.40	0.41	18.97	0.42	3	4.79	0.19

%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	1.716	23 30 45.38400	+18 40 53.1732	1086-0615633	352.689100	+18.681437	355	304	1972.6	0	0	2	20.64			20.38
2	7.521	23 30 44.96808	+18 40 53.8932	1086-0615629	352.687367	+18.681637	168	134	1966.6	0	0	3	18.93	18.31			17.83
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%207.521&%3cFONT%20COLOR=%27#CD5B45%27>23%2030%2044.96808&%3cFONT%20COLOR=%27#CD5B45%27>%2b18%2040%2053.8932&1086-0615629&352.687367&%2b18.681637&168&134&1966.6&%20%20%20%20%200&%20%20%20%20%200&3&18.93&18.31&%20&%20&17.83%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ664287c52b94cb&-out.add=.&-source=I/284/out&USNO-B1.0===1086-0615630&-out.orig=o' class='full'3 8.91323 30 45.00072+18 40 57.89281086-0615630352.687503+18.6827482462311981.6 8 704  17.7820.9719.4918.38 %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	1.714	23 30 45.384000	+18 40 53.16996	1086-0654842	..	352.6891000	+18.6814361	B	0.0	0.0	0.0	0.0	20.640	o			20.380	B
2	7.521	23 30 44.968008	+18 40 53.88996	1086-0654838	..	352.6873667	+18.6816361	B	0.0	0.0	0.0	0.0	18.930	o			18.310	e
3	8.912	23 30 45.000672	+18 40 57.88992	1086-0654839	..	352.6875028	+18.6827472	B	8.0	9.0	70.0	9.0	20.970	B			19.490	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 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.3 [****ClosingBrace(s)Inserted****]
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GSC2.3

%22>RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 1.04123 30 45.44664+18 40 53.1048N0QF012878352.689361+18.6814181990.582  20.99    3 2.28 0.22 2 7.23823 30 45.94512+18 40 49.1376N0QF012877352.691438+18.6803161990.582  21.36    3 2.05 0.28 3 7.37623 30 44.97600+18 40 53.7312N0QF009956352.687400+18.6815921990.70217.4018.97  17.093 4.79 0.19 %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	1.689	23 30 45.39648	+18 40 53.3532	352.689152	+18.681487	11.1	1.9			20.64			20.38		2	0
2	7.361	23 30 44.97600	+18 40 53.6556	352.687400	+18.681571	4.4	-9.6			18.93		18.31		17.83	3	0
3	8.843	23 30 45.00024	+18 40 57.7740	352.687501	+18.682715	8.1	64.3				20.97	17.78	19.49	18.38	4	0

%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	[****ClosingBrace(s)Inserted****]
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mag&%">\BegDIVclass='sort-down ' </A>dece_
magmagG
mage_
magmagGrvs
mage_
magalphaEpoch
yrdeltaEpoch
yrpmRA
mas/yre_
(...)pmDE
mas/yre_
(...) 1 1.19823 30 45.42715+18 40 53.0943352.689280+18.681415 0.049 0.10120.987 0.30020.380 0.40020.214 0.11019.232 0.1342009.78002009.7800 11.1 9.0 1.9 9.0 2 6.77723 30 45.93195+18 40 49.8851352.691383+18.680524 0.137 0.16721.356 0.30021.213 0.21920.874 0.16019.918 0.1772009.78002009.7800 0.0 0.0 0.0 0.0 3 7.56723 30 44.96058+18 40 53.6080352.687336+18.681558 0.004 0.00418.967 0.30017.397 0.30018.271 0.08117.396 0.1112009.78002009.7800 4.4 6.9 -9.6 6.9 4 8.40223 30 45.01722+18 40 57.3678352.687572+18.682602 0.016 0.01620.970 0.40019.490 0.40019.799 0.11518.029 0.1382009.78002009.7800 8.1 6.6 64.3 6.6 %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"	URAT1	RAICRS deg	DEICRS deg	Epoch 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	7.448	23 30 44.967012	+18 40 53.44276	544-646550	352.6873626	+18.6815119	2012.908	18.119	0.040

%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_ [****ClosingBrace(s)Inserted****]
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mean%3cSUB%3efluxerror%29%27%29%22%20onMouseOut=%22laz%28%29%22>e_

%20

%22>%5cFONT SIZE=-1e-/s<Gmag>
mag

Var

1 7.51223 30 44.963112306+18 40 53.50245519352.6873463013 0.566+18.6815284598 0.3082824393755393467904       0.8930 8.5629e+02 2.7046e+0018.193NOT_AVAILABLE 2 8.75923 30 45.022758486+18 40 58.02039062352.6875948270 1.767+18.6827834418 0.9642824393755397283840       0.9030 2.0217e+02 1.8959e+0019.760NOT_AVAILABLE %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"	RAJ2000 deg	DEJ2000 deg	ipix	comp	pmRA mas/yr	pmDE mas/yr	Jmag mag	Hmag mag	Kmag mag	B1mag mag	B2mag mag	R1mag mag	R2mag mag	Imag mag	GaiaId	Gmag mag	Clone	Nosc
1	7.538	23 30 44.963160936	+18 40 53.64846120	352.6873465039	+18.6815690170	1859419920024256863		-0.046	-9.734				18.93		18.31		17.83	2824393755393467904	18.193
2	8.456	23 30 45.009284712	+18 40 57.31007556	352.6875386863	+18.6825861321	1859419920616910581		12.763	47.355					20.97	17.78	19.49	18.38	2824393755397283840	19.761		1

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