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	0.897	07 31 58.42200	-04 50 51.8928	0825-05074053	112.993425	-04.847748			15.7	15.7	1955.895
2	19.162	07 31 59.59752	-04 50 43.5624	0825-05074757	112.998323	-04.845434			19.1	18.7	1955.895
3	28.485	07 32 00.17952	-04 50 40.2000	0825-05075079	113.000748	-04.844500			14.0	14.0	1955.895

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eGuide%20Star%20Catalog%20has%20been%20constructed%20to%20support%20the%20%0aoperational%20need%20of%20the%20Hubble%20Space%20Telescope.%0aIt%20contains%20over%2025%20million%20positions%20for%20about%2019%20million%0aobjects,%20of%20which%20more%20than%2015%20million%20are%20classified%20as%20stars.%0aThe%20version%20%3cB%3e1.2%20is%20a%20new%20astrometric%20reduction%20which%20results%20in%0aabsolute%20position%20errors%20about%200.3-0.4%20arcsec.%0a%28see%20GSC%20pages%20at%20URL%20http://www-gsss.stsci.edu/gsc/gsc.html%29%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC	RAJ2000 deg	DEJ2000 deg	PosErr arcsec	Pmag mag	e_ mag	n_	Class	Plate	Epoch yr
1	27.83	07 32 00.1440	-04 50 40.632	0483802550	113.00060	-04.84462	0.3	14.00	0.40	0	0	00TU	1984.007
2	27.84	07 32 00.1464	-04 50 40.704	0483802550	113.00061	-04.84464	0.3	13.96	0.40	0	3	03VX	1982.865

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eGSC-ACT%20%3cEM%3e%28or%20%3cB%3eGSC1.3%29%0ais%20a%20recalibration%20of%20the%20%3cB%3e<%25E%20I/220%7cGSC1.1>,%20the%20catalogue%20constructed%20%0ato%20support%20the%20operational%20need%20of%20the%20Hubble%20Space%20Telescope,%0awith%20the%20%3cB%3e<%25E%20I/246%7cACT>,%20the%20combination%20of%20the%20Astrographic%20Catalogue%0aand%20the%20%3cB%3e%3cEM%3eTycho%20catalogue%20derived%20from%20the%20%3cEM%3e<%25E%20I/239%7cHipparcos>%0amission;%20see%20http://www.projectpluto.com/gsc_act.htm%20for%20more%20details%0aabout%20this%20recalibration.%0a%3cP%3e%0a%22>

>	\BegDIVclass='sort-down ' </A>
dec Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC	RAJ2000 deg	DEJ2000 deg	PosErr arcsec	Pmag mag	e_ mag	n_	Class	Epoch yr
1	27.96	07 32 00.1488	-04 50 40.452	0483802550	113.00062	-04.84457	0.3	13.96	0.41	0	3	1982.865
2	28.19	07 32 00.1632	-04 50 40.380	0483802550	113.00068	-04.84455	0.3	14.02	0.40	0	0	1984.007

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	0.805	07 31 58.39752	-04 50 51.7560	S103102043958	112.993323	-04.847710	1986.197	15.36	0.44	16.29	0.42	0	3.94	0.16
2	20.852	07 31 59.22192	-04 51 08.0208	S103102043890	112.996758	-04.852228	1985.962	18.47	0.44			3	2.71	0.10
3	27.843	07 32 00.13632	-04 50 40.3188	S1031020283	113.000568	-04.844533	1986.197	13.88	0.44	14.58	0.42	0	4.91	0.11

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

%22>%5cFONT SIZE=-1mag 1 0.76907 31 58.40952-04 50 51.76320851-0147418112.993373-04.847712 90 431973.8 0 0516.5315.7516.5715.6414.87 217.46407 31 57.44880-04 50 41.20080851-0147407112.989370-04.844778 41961976.0 -26 -283  19.6219.6518.72   319.41207 31 59.60208-04 50 43.09080851-0147435112.998342-04.8453031492081973.2 0 0519.7518.6418.7517.7017.80 420.95407 31 59.21280-04 51 08.24040851-0147429112.996720-04.852289 88 231978.3 0 04  18.9119.5518.4217.70 522.35607 31 59.78544-04 50 59.99280851-0147439112.999106-04.8499981193381974.7 0 03  19.53  18.5118.46 628.13007 32 00.15552-04 50 40.26120851-0147445113.000648-04.844517104 921973.4 0 0514.7913.7514.3213.8513.07 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20More%20recent%20versions%20available:%20UCAC3%20%28I/315%29%20and%20UCAC4%20%28I/322%29;%20see%20also%20the%20UCAC%20home%20page%20at%20http://ad.usno.navy.mil/ucac/%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	2UCAC	RAJ2000 deg	e_ mas	DEJ2000 deg	e_ mas	UCmag mag	No	Nc	pmRA mas/yr	pmDE mas/yr	2Mkey	Jmag mag	Kmag mag
1	27.916	07 32 00.143664	-04 50 40.39404	30172823	113.0005986	15	-04.8445539	20	13.96	4	2	-3.9	-6.4	198510878	12.938	12.594

%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	[****ClosingBrace(s)Inserted****]
">

mag&%">\BegDIVclass='sort-down ' </A>decHmag
magKmag
mag

R

1 0.76607 31 58.409328-04 50 51.759960851-0151278YM112.9933722-04.8477111B 0.0 0.0 0.0 0.015.450Y15.380Y15.640B15.05314.75014.560   217.46707 31 57.448656-04 50 41.200080851-0151266..112.9893694-04.8447778B -26.0 0.0 -28.0 7.019.650B    18.720B         319.41107 31 59.602008-04 50 43.090080851-0151295..112.9983417-04.8453028B 0.0 0.0 0.0 0.018.750B    17.700B         420.95207 31 59.212656-04 51 08.240040851-0151289..112.9967194-04.8522889B 0.0 0.0 0.0 0.019.550B    18.420B         522.35407 31 59.785344-04 50 59.989920851-0151299..112.9991056-04.8499972B 0.0 0.0 0.0 0.0        18.510B         627.91607 32 00.143664-04 50 40.394040851-0151306YM113.0005986-04.8445539C -3.8 7.5 -6.4 7.513.970Y13.800Y13.850B12.93812.63312.594   %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	f_	RAICRS deg	DEICRS deg	r'mag mag	Nt	Jmag mag	Hmag mag	Ksmag mag
1	1.037	07 31 58.41384	-04 50 52.0368	073158.4-045052		112.993391	-04.847788	15.965	2	15.053	14.751	14.561
2	27.896	07 32 00.14472	-04 50 40.4844	073200.1-045040		113.000603	-04.844579	13.985	2	12.938	12.633	12.594

%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