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	5.908	23 20 30.75072	+24 46 33.7512	1125-19770969	350.128128	+24.776042			15.2	15.7	1953.767
2	8.152	23 20 30.79272	+24 46 31.5732	1125-19770975	350.128303	+24.775437			13.2	12.6	1953.767

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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	8.211	23 20 30.78144	+24 46 31.4616	EO0843-0138611	350.128256	+24.775406	14.27		1	11.00	27.3	0.31	15.71		1	26.43	24.3	1.44
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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	8.266	23 20 30.78984	+24 46 31.4400	N00122323197	350.128291	+24.775400	1995.650	13.25	0.42	13.70	0.42	3	10.65	0.32

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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	0.528	23 20 30.63672	+24 46 39.1224	1147-0577195	350.127653	+24.777534	335	584	1974.7	0	0	2	19.09				18.07
2	6.033	23 20 30.74544	+24 46 33.5928	1147-0577196	350.128106	+24.775998	85	248	1973.7	0	0	4	15.58	14.79		13.88	13.57
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%206.033&%3cFONT%20COLOR=%27#CD5B45%27>23%2020%2030.74544&%3cFONT%20COLOR=%27#CD5B45%27>%2b24%2046%2033.5928&1147-0577196&350.128106&%2b24.775998&%2085&248&1973.7&%20%20%20%20%200&%20%20%20%20%200&4&15.58&14.79&%20&13.88&13.57%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6629970c3be38c&-out.add=.&-source=I/284/out&USNO-B1.0===1147-0577197&-out.orig=o' class='full'3 7.99923 20 30.79800+24 46 31.76041147-0577197350.128325+24.7754891841251978.5 -8 58516.9313.5412.9312.2411.23 %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	0.528	23 20 30.636672	+24 46 39.11988	1147-0605332	..	350.1276528	+24.7775333	B	0.0	0.0	0.0	0.0	19.090	o
2	6.036	23 20 30.745344	+24 46 33.58992	1147-0605333	YM	350.1281056	+24.7759972	B	0.0	0.0	0.0	0.0	17.690	o			13.880	B	16.192	15.554	15.317
3	8.000	23 20 30.798000	+24 46 31.76004	1147-0605334	..	350.1283250	+24.7754889	B	-8.0	6.0	58.0	4.0	12.930	B			12.240	B

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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 8.26423 20 30.79008+24 46 31.4436N0BY003197350.128292+24.7754011995.65013.2513.7015.1713.213 10.65 0.32 %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	0.659	23 20 30.64416	+24 46 39.5616	350.127684	+24.777656	11.8	10.1			19.09				18.07	2	0
2	6.231	23 20 30.76392	+24 46 33.4740	350.128183	+24.775965	7.3	-6.4	16.192	15.318	15.58		14.79	13.88	13.57	5	0
3	7.775	23 20 30.78816	+24 46 31.9512	350.128284	+24.775542	-7.6	62.6	16.192	15.318	16.93	12.93	13.54	12.24	11.23	6	0

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

%20

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

magG
mag

e_
mag

magGrvs
mag

e_
mag

alphaEpoch
yr

deltaEpoch
yr

pmRA
mas/yr

e_
(...)

pmDE
mas/yr

e_
(...)

1 6.23123 20 30.76395+24 46 33.4739350.128183+24.775965 0.091 0.11515.580 0.40013.880 0.40014.111 0.40012.821 0.5001978.44001978.4400 7.3 4.6 -6.4 5.7 2 8.80323 20 30.76424+24 46 30.7771350.128184+24.775216 0.015 0.03313.697 0.30013.251 0.30015.764 0.08014.830 0.1102004.71002004.7100 -7.6 4.4 62.6 4.4 %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	8.543	23 20 30.778164	+24 46 32.06952	574-614585	350.1281956	+24.7752936	2013.049	16.741	0.028	-11.7	-77.6	16.192	15.554	15.318	17.235	16.722	16.836	16.281

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