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	0.935	11 39 33.32808	+59 59 42.2700	1425-07697250	174.888867	+59.995075			18.6	17.5	1953.285

%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	0.693	11 39 33.28536	+59 59 42.3528	EO0723-0118243	174.888689	+59.995098	17.29		1	5.73	10.8	0.05	19.62		1	3.49	8.2	2.33
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.693&%3cFONT%20COLOR=%27#CD5B45%27>11%2039%2033.28536&%3cFONT%20COLOR=%27#CD5B45%27>%2b59%2059%2042.3528&EO0723-0118243&174.888689&%2b59.995098&17.29&%20&%201&%20%20%205.73&%20%2010.8&%200.05&19.62&%20&%201&%20%20%203.49&%20%20%208.2&%20%202.33&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66222d7538402b&-out.add=.&-source=I/267/out&APM-ID===EO0723-0118350&-out.orig=o' class='full'2 8.07311 39 33.32136+59 59 34.9332EO0723-0118350174.888839+59.99303720.00L 0      22.08   1 3.95 4.7 2.08   3 8.43411 39 34.20288+59 59 47.4432EO0723-0118157174.892512+59.99651220.00L 0      21.72  -1 2.31 4.6 1.72   %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	1.159	11 39 33.36528	+59 59 42.2304	N2121230480	174.889022	+59.995064	1993.305	17.18	0.35	18.54	0.42	0	3.88	0.26

%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	0.706	11 39 33.30816	+59 59 42.4428	1499-0200494	174.888784	+59.995123	48	100	1978.6	0	0	5	18.12	17.02	17.87	17.51	16.63
2	1.170	11 39 33.17352	+59 59 41.9604	1499-0200491	174.888223	+59.994989	138	93	1981.5	-172	-120	3	20.15		18.81		17.17
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%201.170&%3cFONT%20COLOR=%27#CD5B45%27>11%2039%2033.17352&%3cFONT%20COLOR=%27#CD5B45%27>%2b59%2059%2041.9604&1499-0200491&174.888223&%2b59.994989&138&%2093&1981.5&%20%20-172&%20%20-120&3&20.15&%20&18.81&%20&17.17%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66222d7538402b&-out.add=.&-source=I/284/out&USNO-B1.0===1499-0200493&-out.orig=o' class='full'3 5.93911 39 33.26688+59 59 37.05001499-0200493174.888612+59.993625138 511980.2 6 203  20.0319.7520.04   4 6.13511 39 34.03800+59 59 44.58121499-0200495174.891825+59.9957179999991976.2 0 0219.90      18.45 5 6.83211 39 33.21288+59 59 36.16081499-0200492174.888387+59.993378 19 231980.2 -6 143  19.7920.6119.64   6 7.44111 39 33.09888+59 59 35.63161499-0200489174.887912+59.993231660 191993.7 0 02    20.3620.06   %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	0.708	11 39 33.307992	+59 59 42.43992	1499-0208253	YM	174.8887833	+59.9951222	B	0.0	0.0	0.0	0.0	18.350	Y			17.510	B	16.333	15.871	15.263
2	1.171	11 39 33.173328	+59 59 41.96004	1499-0208250	..	174.8882222	+59.9949889	B	-172.0	5.0	-120.0	3.0	18.810	B
3	5.939	11 39 33.266664	+59 59 37.05000	1499-0208252	..	174.8886111	+59.9936250	B	6.0	5.0	20.0	1.0	19.750	B			20.040	B
4	6.134	11 39 34.038000	+59 59 44.58012	1499-0208254	..	174.8918250	+59.9957167	B	0.0	0.0	0.0	0.0	19.900	o
5	6.833	11 39 33.212664	+59 59 36.16008	1499-0208251	..	174.8883861	+59.9933778	B	-6.0	0.0	14.0	0.0	20.610	B			19.640	B
6	7.442	11 39 33.098664	+59 59 35.63016	1499-0208248	..	174.8879111	+59.9932306	B	0.0	0.0	0.0	0.0	20.360	B			20.060	B

%0a%22>ts_init('!ext/nomad1.exe_5');

Note: This version of the GSC-II has no proper motions, but the limits on brightness which existed on GSC2.2 (F<18.5, B_j<19.5) were removed.

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	1.158	11 39 33.36552	+59 59 42.2340	N7L8000480	174.889023	+59.995065	1993.305	17.18	18.54	17.90	17.08	0	3.88	0.26
2	8.318	11 39 33.26256	+59 59 34.6704	N7L8000470	174.888594	+59.992964	1993.305	19.99				3	2.37	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 [****ClosingBrace(s)Inserted****]
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fl

%22> 1 0.79811 39 33.35112+59 59 42.7848174.888963+59.995218 6.5 10.416.33415.26418.1217.8717.0217.5116.63 6 1 2 1.34511 39 33.16824+59 59 41.7840174.888201+59.994940 -173.9 -121.9    20.1518.81    17.17 3 0 3 4.75811 39 33.85920+59 59 44.2680174.891080+59.995630 -30.0 -76.8    19.90      18.45 2 0 4 6.17011 39 33.26784+59 59 36.8196174.888616+59.993561 4.8 16.4      19.7520.0320.04   3 0 5 7.05011 39 33.21600+59 59 35.9412174.888400+59.993317 -6.8 10.7      20.6119.7919.64   3 0 %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	ID	RAICRS deg	DEICRS deg	pmRAp mas/yr	pmDEp mas/yr	pmRAx mas/yr	pmDEx mas/yr	Fmag mag	Bjmag mag	Vmag mag	Nmag mag	Jmag mag	e_ mag	Hmag mag	e_ mag	Kmag mag	e_ mag	2Mkey	Bmag mag	Rmag mag	Fld	dT yr	fg	fs	M
1	1.043	11 39 33.38305	+59 59 43.2420	XPM 299-0383813	174.889096	+59.995345	6.19	18.03	6.44	18.28	17.179	18.535	17.903	17.078	16.334	0.114	15.871	0.146	15.264	0.160	563552372	18.6	17.5	95	45.877556	0	0	M

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	[****ClosingBrace(s)Inserted****]
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%22d:m:s%22&%">\BegDIVclass='sort-down ' </A>decRAJ2000
degDEJ2000
dege_RAJ2000
(...)e_DEJ2000
arcsecmagBJ
mage_
magmagRF
mage_
magmagG
mage_
magmagGrvs
mage_
magalphaEpoch
yrdeltaEpoch
yrpmRA
mas/yre_
(...)pmDE
mas/yre_
(...) 1 0.93311 39 33.31020+59 59 42.1781174.888793+59.995049 0.008 0.00718.535 0.30017.179 0.30017.750 0.08116.568 0.1112007.19002007.1900 6.5 4.3 10.4 4.3 2 6.16911 39 33.26786+59 59 36.8201174.888616+59.993561 0.133 0.13319.750 0.40020.040 0.40019.938 0.40020.082 0.5001980.29001980.2900 4.8 7.0 16.4 7.0 3 7.44211 39 33.28005+59 59 35.5490174.888667+59.993208 0.031 0.03420.610 0.40019.989 0.30020.199 0.09919.011 0.1252007.19002007.1900 -6.8 7.0 10.7 7.0 %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"	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	0.833	11 39 33.377543	+59 59 43.18140	750-228337	174.8888333	+59.9950975	2013.793	17.617	0.021	-31.3	-60.2	16.334	15.871	15.264

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