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	5.381	12 52 29.79816	+24 08 57.5700	1125-06603832	193.124159	+24.149325			18.9	18.8	1955.385
2	7.326	12 52 29.80800	+24 08 55.6224	1125-06603833	193.124200	+24.148784			19.5	18.9	1955.385

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cB%3e%3cFONT%20COLOR=%27#CD5B45%27>%20The%20current%20version%20includes%20only%20the%20North%20%28POSS-I%20plates%29%3cP%3e%0a

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	6.201	12 52 29.79144	+24 08 56.7528	EO1435-0111761	193.124131	+24.149098	18.69		1	6.51	10.4	0.58	20.29		1	9.13	12.3	1.59
[****ClosingBrace(s)Inserted****]
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%206.201&%3cFONT%20COLOR=%27#CD5B45%27>12%2052%2029.79144&%3cFONT%20COLOR=%27#CD5B45%27>%2b24%2008%2056.7528&EO1435-0111761&193.124131&%2b24.149098&18.69&%20&%201&%20%20%206.51&%20%2010.4&%200.58&20.29&%20&%201&%20%20%209.13&%20%2012.3&%20%201.59&%20%3cBR%3e">\EndTABLESORT

Note: The construction of the GSC-II is still in progress: this version has no proper motions, and the magnitude limits are 18.5 in F (red) and 19.5 in J (blue). The data are copyrighted, check the data use Policy.

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	6.333	12 52 29.80176	+24 08 56.6160	N1223000461	193.124174	+24.149060	1998.294					3	5.02	0.58

%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	0.835	12 52 29.85408	+24 09 02.3724	1141-0199643	193.124392	+24.150659	415	934	1992.3	0	0	2			20.71	19.80
2	5.379	12 52 29.81352	+24 08 57.5700	1141-0199642	193.124223	+24.149325	86	260	1978.7	6	46	5	20.50	19.45	19.71	18.70	18.38
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">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%205.379&%3cFONT%20COLOR=%27#CD5B45%27>12%2052%2029.81352&%3cFONT%20COLOR=%27#CD5B45%27>%2b24%2008%2057.5700&1141-0199642&193.124223&%2b24.149325&%2086&260&1978.7&%20%20%20%20%206&%20%20%20%2046&5&20.50&19.45&19.71&18.70&18.38%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ662219c2220158&-out.add=.&-source=I/284/out&USNO-B1.0===1141-0199640&-out.orig=o' class='full'3 6.01812 52 29.78472+24 08 56.94001141-0199640193.124103+24.149150 188371967.7 0 0319.9419.34  19.40   4 9.51312 52 29.78736+24 08 53.44081141-0199641193.124114+24.1481785297751995.3 0 02    20.80  18.07 %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	0.836	12 52 29.854008	+24 09 02.36988	1141-0204183	..	193.1243917	+24.1506583	B	0.0	0.0	0.0	0.0	20.710	B			19.800	B
2	5.379	12 52 29.813328	+24 08 57.57000	1141-0204182	..	193.1242222	+24.1493250	B	6.0	3.0	46.0	9.0	19.710	B			18.700	B
3	6.018	12 52 29.784672	+24 08 56.94000	1141-0204180	..	193.1241028	+24.1491500	B	0.0	0.0	0.0	0.0	19.940	o			19.400	B
4	9.513	12 52 29.787336	+24 08 53.44008	1141-0204181	..	193.1241139	+24.1481778	B	0.0	0.0	0.0	0.0	20.800	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"	[****ClosingBrace(s)Inserted****]
">

%22h:m:s%22&%">\BegDIVclass='sort-down ' </A>string _DEJ2000
"d:m:s"GSC2.3

RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 5.75012 52 29.81640+24 08 57.1992N5A8000461193.124235+24.1492221992.33418.5619.8918.8018.023 4.61 0.60 %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	5.491	12 52 29.80320	+24 08 57.4584	193.124180	+24.149294	-3.4	41.1			20.50	19.71	19.45	18.70	18.38	5	0
2	6.389	12 52 29.77632	+24 08 56.5764	193.124068	+24.149049	-9.1	-19.6			19.94		19.34	19.40		3	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	e_ mag	magG mag	[****ClosingBrace(s)Inserted****]
">

mag&%">\BegDIVclass='sort-down ' </A>dece_
magmagGrvs
mage_
magalphaEpoch
yrdeltaEpoch
yrpmRA
mas/yre_
(...)pmDE
mas/yre_
(...) 1 5.49112 52 29.80322+24 08 57.4580193.124180+24.149294 0.103 0.10319.887 0.30018.562 0.30018.802 0.40017.751 0.5001978.75001978.7500 -3.4 5.4 41.1 5.4 2 6.04912 52 29.80385+24 08 56.8997193.124183+24.149139 0.073 0.20019.940 0.40019.400 0.40018.498 0.08717.525 0.1152005.25002005.2500 -9.1 7.6 -19.6 7.6 %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"	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	5.811	12 52 29.796925	+24 08 57.14025	193.1241539	108.00	+24.1492056	234.00	56000+0000461	4	-0.3	4.0	18.4	8.6	6	42.907	18.562	19.887	18.019	18.797

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