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	7.836	00 15 59.09352	-00 17 52.8324	0825-00065679	003.996223	-00.298009			17.7	18.7	1951.607

%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	7.571	00 15 59.09736	-00 17 52.3320	EO0319-0198422	003.996239	-00.297870	18.80		1	6.00	6.0	0.21	21.86	L	0			3.06

%0a%0a%5b%2a%2a%2a%2aClosingBrace%28s%29Inserted%2a%2a%2a%2a%5d">">\scripttype='text/javascript' ts_init('!ext/apm.exe_2');

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	5.556	00 15 58.95072	-00 17 51.7956	S00000234915	003.995628	-00.297721	1991.759	15.36	0.42	14.34	0.41	3	10.46	0.15

%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	5.517	00 15 58.45152	-00 17 51.9900	0897-0002498	003.993548	-00.297775	875	246	1968.2	208	146	3	18.78	18.61			18.17
2	7.451	00 15 59.06088	-00 17 52.8108	0897-0002500	003.996087	-00.298003	187	165	1977.0	0	0	5	17.79	18.69	18.13	17.50	18.04
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%207.451&%3cFONT%20COLOR=%27#CD5B45%27>00%2015%2059.06088&%3cFONT%20COLOR=%27#CD5B45%27>-00%2017%2052.8108&0897-0002500&003.996087&-00.298003&187&165&1977.0&%20%20%20%20%200&%20%20%20%20%200&5&17.79&18.69&18.13&17.50&18.04%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6643514b3b6b08&-out.add=.&-source=I/284/out&USNO-B1.0===0897-0002501&-out.orig=o' class='full'3 7.73600 15 59.18880-00 17 45.73320897-0002501003.996620-00.2960374443201972.1 0 0219.45  18.50     4 8.58900 15 59.22600-00 17 44.71080897-0002502003.996775-00.2957539999991977.2 0 0320.09  18.2618.26   %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	5.519	00 15 58.451328	-00 17 51.99000	0897-0002509	..	003.9935472	-00.2977750	B	208.0	22.0	146.0	6.0	18.780	o			18.610	e
2	7.449	00 15 59.060664	-00 17 52.81008	0897-0002511	..	003.9960861	-00.2980028	B	0.0	0.0	0.0	0.0	18.130	B			17.500	B
3	7.735	00 15 59.188656	-00 17 45.72996	0897-0002512	..	003.9966194	-00.2960361	B	0.0	0.0	0.0	0.0	18.500	B
4	8.590	00 15 59.226000	-00 17 44.71008	0897-0002513	..	003.9967750	-00.2957528	B	0.0	0.0	0.0	0.0	18.260	B			18.260	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 5.55300 15 58.95096-00 17 51.7884S00B004915003.995629-00.2977191991.75915.3614.34  16.783 10.46 0.15 2 8.05600 15 58.32648-00 17 41.9172S00B005676003.993027-00.2949771991.75920.34      3 1.94 0.58 3 9.35400 15 58.09296-00 17 45.2256S00B005675003.992054-00.2958961991.75920.02      3 2.37 0.19 %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	5.539	00 15 58.46496	-00 17 52.1844	003.993604	-00.297829	217.0	138.2			18.78		18.61		18.17	3	0
2	7.203	00 15 59.13336	-00 17 44.9736	003.996389	-00.295826	-27.7	-37.9			20.09	18.26		18.26		3	1
3	7.419	00 15 59.17176	-00 17 46.0032	003.996549	-00.296112	-7.0	-14.4			19.45	18.50				2	0
4	7.452	00 15 59.06112	-00 17 52.8072	003.996088	-00.298002	-1.0	-2.8			17.79	18.13	18.69	17.50	18.04	5	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	[****ClosingBrace(s)Inserted****]
">

arcsec&%">\BegDIVclass='sort-down ' </A>decmagBJ
mage_
magmagRF
mage_
magmagG
mage_
magmagGrvs
mage_
magalphaEpoch
yrdeltaEpoch
yrpmRA
mas/yre_
(...)pmDE
mas/yre_
(...) 1 7.75900 15 59.10238-00 17 52.5441003.996260-00.297929 0.094 0.08214.343 0.30015.357 0.30016.437 0.08616.006 0.1142003.88002003.8800 -1.0 4.8 -2.8 4.8 %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	6.483	00 15 59.037409	-00 17 51.71781	003.9959892	500.00	-00.2976994	490.00	32779+0004915	3	-31.2	16.9	-12.4	16.6	6	40.991	15.357	14.343	16.776

%0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	Class	Gmag [****ClosingBrace(s)Inserted****]
">

Gmag

%20

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

Bjmag
mag

Fpgmag
mag

Epgmag
mag

Npgmag
mag

Umag
mag

Bmag
mag

Vmag
mag

umag
mag

gmag
mag

rmag
mag

imag
mag

zmag
mag

ymag
mag

Jmag
mag

Hmag
mag

Ksmag
mag

Zmag
mag

Ymag
mag

W1mag
mag

W2mag
mag

W3mag
mag

W4mag
mag

FUVmag
mag

NUVmag
mag

a
pix

e
pix

PA
pix

1 5.55500 15 58.9272274513-00 17 52.056784713S00B004915003.99562788010-00.29772087932 2000002349151991.7600  18.78750014.34300015.357700  16.776800                                         10.457 0.154 86.3 2 5.58800 15 58.3748088000-00 17 50.744508000S00B028400003.99322837000-00.29742903000 20000023284002012.0943                  26.98223.13922.63921.22220.66720.4605                             3 5.67900 15 58.7534364781-00 17 53.421521276S00B016630003.99480598533-00.29817264480 20000023166302003.8853                  23.61422.89123.65424.36222.827                               4 5.68900 15 58.7489870880-00 17 53.442732415S00B045667003.99478744620-00.29817853678 20000023456672012.0003                               19.042                           5 6.06900 15 59.0849976000-00 17 46.366548000S00B014053003.99618749000-00.29621293000 20000023140532013.5303                  24.63522.83022.97221.86122.49220.2383                             6 7.42700 15 58.6296576000-00 17 40.449588000S00B061782003.99429024000-00.29456933000 20000023617822013.4963                    22.006  20.816                                 7 7.68500 15 59.0954212560-00 17 52.557475290S00B046543003.99623092190-00.29793263202 20000023465432012.0003                               16.363 16.233 16.890                       8 7.88400 15 59.1089328000-00 17 52.620432000S00B021817003.99628722000-00.29795012000 20000023218172012.0803                  17.90920.68620.19019.86019.70419.5205                             9 8.05300 15 58.3262443542-00 17 41.923992634S00B005676003.99302601814-00.29497888684 2000002356761991.7600      20.337800                                             1.941 0.576 18.3 10 8.75900 15 59.0902728000-00 17 41.409744000S00B014051003.99620947000-00.29483604000 20000023140512011.0213                  24.63521.82721.70321.60122.858                               11 9.06300 15 58.0889244941-00 17 47.299712990S00B014046003.99203718539-00.29647214250 20000023140462003.8853                  24.16724.03023.44324.13222.873                               12 9.08500 15 58.3996154088-00 17 55.773218310S00B046898003.99333173087-00.29882589397 20000023468982012.0003                               18.894                           13 9.35600 15 58.0688497457-00 17 44.719173853S00B005675003.99205303192-00.29589769244 2000002356751991.7600      20.017600                                             2.370 0.185 47.0 14 9.90300 15 59.1901782237-00 17 41.316587505S00B014042003.99662574260-00.29481016320 20000023140422003.8853                  24.35423.63824.32224.20722.793                               %0a%0a%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20SDSS%20is%20also%20available%20from%20http://www.sdss.org/%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	mode	cl	SDSS	m_	zsp	umag mag	e_ mag	gmag mag	e_ mag	rmag mag	e_ mag	imag mag	e_ mag	zmag mag	e_ mag	RA_ICRS deg	DE_ICRS deg	ObsDate yr	Q
1	7.882	00 15 59.12376	-00 17 52.3140	1	3	J001559.12-001752.3			17.703	0.091	17.032	0.020	16.432	0.018	16.212	0.023	16.205	0.090	003.996349	-00.297865	2002.6785	2

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