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	1.421	20 48 34.24152	+11 40 45.1200	0975-19638419	312.142673	+11.679200			13.5	12.7	1952.634
2	5.978	20 48 34.15608	+11 40 38.9208	0975-19638384	312.142317	+11.677478			16.1	16.0	1952.634

%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 [****ClosingBrace(s)Inserted****]
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Mflag

%22> 1 1.39220 48 34.23600+11 40 44.4612EO0558-0396051312.142650+11.67901712.48   1 22.12 24.6 0.4013.45   2 30.45 31.7 0.97   %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	2.416	20 48 34.26912	+11 40 46.4988	N031022118201	312.142788	+11.679583	1987.494	13.17	0.42	13.19	0.42	3	8.60	0.29
2	6.092	20 48 34.11672	+11 40 38.8200	N031022118203	312.142153	+11.677450	1987.494	15.39	0.42			3	6.52	0.20

%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	1.448	20 48 34.24416	+11 40 45.0300	1016-0617206	312.142684	+11.679175	90	63	1975.5	0	0	5	14.36	13.12	12.21	12.06	11.34
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%201.448&%3cFONT%20COLOR=%27#CD5B45%27>20%2048%2034.24416&%3cFONT%20COLOR=%27#CD5B45%27>%2b11%2040%2045.0300&1016-0617206&312.142684&%2b11.679175&%2090&%2063&1975.5&%20%20%20%20%200&%20%20%20%20%200&5&14.36&13.12&12.21&12.06&11.34%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663d9a5425ff2e&-out.add=.&-source=I/284/out&USNO-B1.0===1016-0617207&-out.orig=o' class='full'2 3.79120 48 34.28400+11 40 48.10081016-0617207312.142850+11.680028 149991952.6 0 0216.5817.57       3 5.80520 48 34.16808+11 40 39.10081016-0617203312.142367+11.677528 153291966.5 6 4316.9616.08    15.83 %0a%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	1.446	20 48 34.243992	+11 40 45.03000	1016-0655945	YM	312.1426833	+11.6791750	B	0.0	0.0	0.0	0.0	17.190	Y	17.240	Y	12.060	B	15.058	14.476	14.034
2	3.791	20 48 34.284000	+11 40 48.10008	1016-0655946	..	312.1428500	+11.6800278	B	0.0	0.0	0.0	0.0	16.580	o			17.570	e
3	5.806	20 48 34.168008	+11 40 39.10008	1016-0655942	..	312.1423667	+11.6775278	B	6.0	0.0	4.0	8.0	16.960	o			16.080	e

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20Zone%20-30/%2b50deg%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	CMC14 [****ClosingBrace(s)Inserted****]
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CMC14

%20

%22>f_

RAICRS
deg

DEICRS
deg

r'mag
mag

Nt

Jmag
mag

Hmag
mag

Ksmag
mag

1 1.22920 48 34.22928+11 40 45.0192204834.2+114045  312.142622+11.67917216.282 215.059     %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	RAJ2000 deg	DEJ2000 deg	Epoch yr	Fmag mag	jmag mag	Vmag mag	Nmag mag	Class	a pix	e
1	2.418	20 48 34.26912	+11 40 46.5024	N2LL018201	312.142788	+11.679584	1987.494	13.17	13.19	13.96	13.24	3	8.60	0.29
2	6.092	20 48 34.11696	+11 40 38.8200	N2LL018203	312.142154	+11.677450	1987.494	15.39			16.82	3	6.52	0.20

%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 [****ClosingBrace(s)Inserted****]
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fl

%20

%22> 1 1.34920 48 34.23720+11 40 45.0588312.142655+11.679183 1.2 2.515.05914.03414.3612.2113.1212.0611.34 6 0 2 6.06720 48 34.16688+11 40 38.8380312.142362+11.677455 7.6 -0.1    16.96  16.08  15.83 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	e_ mag	magGrvs mag	e_ mag	alphaEpoch yr	deltaEpoch yr	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)
1	1.349	20 48 34.23717	+11 40 45.0593	312.142655	+11.679183	0.063	0.063	12.210	0.400	12.060	0.400	12.087	0.400	11.890	0.500	1991.0200	1991.0200	1.2	3.8	2.5	3.8
2	2.550	20 48 34.27528	+11 40 46.5991	312.142814	+11.679611	0.400	0.400	13.187	0.300	13.167	0.300	13.157	0.400	13.060	0.500	1987.4900	1987.4900	7.4	4.8	8.1	24.0
3	6.067	20 48 34.16685	+11 40 38.8378	312.142362	+11.677455	0.133	0.133	16.960	0.400	15.394	0.300	15.634	0.400	14.427	0.500	1966.5600	1966.5600	7.6	6.7	-0.1	6.7

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20Zone%20-40/%2b50deg%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	CMC15	RA_ICRS deg	DE_ICRS deg	r'mag [****ClosingBrace(s)Inserted****]
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r%27mag

%20

%22>%5cFONT SIZE=-1magpflag

Nt

Jmag
mag

Hmag
mag

Ksmag
mag

1 1.23320 48 34.22951+11 40 45.0193204834.2+114045312.142623+11.67917216.282   215.059     %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	1.290	20 48 34.235029	+11 40 45.10536	509-623057	312.1426389	+11.6791742	2013.049	16.172	0.069	-1.9	-6.0	15.059	14.476	14.034
2	7.676	20 48 34.195261	+11 40 37.25510	509-623055	312.1424803	+11.6770153	2013.012	17.145	0.053

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