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	0.557	23 32 08.99472	-02 16 46.4700	0825-19964096	353.037478	-02.279575			19.0	18.5	1954.569

%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	1.684	23 32 09.07416	-02 16 46.5204	EO0431-0319389	353.037809	-02.279589	19.07		1	2.28	5.3	0.24	20.74		1	6.76	6.2	1.66
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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	0.782	23 32 09.01296	-02 16 46.4376	S32001302051	353.037554	-02.279566	1982.847			19.15	0.42	3	3.46	0.20

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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	0.801	23 32 09.01800	-02 16 46.0812	0877-0866802	353.037575	-02.279467	199	574	1977.1	0	0	2	20.08				17.48
2	1.403	23 32 09.05400	-02 16 46.5600	0877-0866803	353.037725	-02.279600	401	316	1980.2	0	0	4	20.84		19.37	18.40	18.09
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%201.403&%3cFONT%20COLOR=%27#CD5B45%27>23%2032%2009.05400&%3cFONT%20COLOR=%27#CD5B45%27>-02%2016%2046.5600&0877-0866803&353.037725&-02.279600&401&316&1980.2&%20%20%20%20%200&%20%20%20%20%200&4&20.84&%20&19.37&18.40&18.09%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66220517377fc0&-out.add=.&-source=I/284/out&USNO-B1.0===0877-0866804&-out.orig=o' class='full'3 1.70323 32 09.07680-02 16 45.86160877-0866804353.037820-02.2794061202951974.3 30 10520.7118.5819.1118.2318.39 %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	0.801	23 32 09.018000	-02 16 46.08012	0877-0914220	..	353.0375750	-02.2794667	B	0.0	0.0	0.0	0.0	20.080	o
2	1.403	23 32 09.054000	-02 16 46.56000	0877-0914221	..	353.0377250	-02.2796000	B	0.0	0.0	0.0	0.0	19.370	B			18.400	B
3	1.701	23 32 09.076656	-02 16 45.86016	0877-0914222	..	353.0378194	-02.2794056	B	30.0	3.0	10.0	9.0	19.110	B			18.230	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 1.28523 32 09.04992-02 16 46.2792SB30002051353.037708-02.2795221988.83618.5119.15  18.783 3.50 0.28 2 9.80823 32 08.43936-02 16 51.9888SB30002045353.035164-02.2811081988.83620.1922.33    3 1.73 0.45 %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	0.803	23 32 09.01080	-02 16 45.7320	353.037545	-02.279370	9.3	20.8			20.08				17.48	2	0
2	1.374	23 32 09.03864	-02 16 46.9524	353.037661	-02.279709	7.6	-2.3			20.84	19.37		18.40	18.09	4	0
3	1.869	23 32 09.08880	-02 16 45.9624	353.037870	-02.279434	46.5	19.3			20.71	19.11	18.58		18.39	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 [****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 1.31723 32 09.04913-02 16 46.5047353.037705-02.279585 0.030 0.02919.370 0.40018.400 0.40018.855 0.08517.962 0.1142009.70002009.7000 7.6 7.0 -2.3 7.0 2 1.86823 32 09.08878-02 16 45.9618353.037870-02.279434 0.115 0.11519.147 0.30018.505 0.30018.654 0.40018.085 0.5001970.75001970.7500 46.5 6.4 19.3 6.4 3 9.53923 32 08.51337-02 16 52.8661353.035472-02.281352 0.400 0.40022.331 0.30020.185 0.30020.338 0.40018.790 0.5001988.84001988.8400 99.6 142.7 -78.2 70.7 %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	1.499	23 32 09.064722	-02 16 46.11506	353.0377697	95.00	-02.2794764	72.00	47132+0002051	4	16.0	3.6	10.8	2.7	10	43.887	18.505	19.147	18.785

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