The 5 columns in color are computed by VizieR, and are not part of the original data.

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	Name	RAB1950 "h:m:s"	DEB1950 "d:m:s"	bmag mag	Nfields	Flag1	Flag2	Flag3	_RA.icrs "h:m:s"	_DE.icrs "d:m:s"
1	18.654	13 39 06.25054	-20 17 24.1258	-20.0417	13 36 22.336	-20 02 11.55	15.82	1	0	0	0	13 39 06.251	-20 17 24.13

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%25

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 12.288 13 39 05.60952 -20 17 25.5228 0675-12753455 204.773373 -20.290423     17.5 17.6 1954.249 2 18.460 13 39 06.23808 -20 17 24.0432 0675-12753571 204.775992 -20.290012     14.1 13.0 1954.249 3 23.379 13 39 03.39744 -20 17 17.2500 0675-12753088 204.764156 -20.288125     18.1 17.8 1981.196 4 23.831 13 39 06.40872 -20 17 01.6512 0675-12753600 204.776703 -20.283792     20.3 18.0 1981.196 [****ClosingBrace(s)Inserted****] "> %3cEM%3e4&%3cFONT%20COLOR=%27#CD5B45%27>23.831&%3cFONT%20COLOR=%27#CD5B45%27>13%2039%2006.40872&%3cFONT%20COLOR=%27#CD5B45%27>-20%2017%2001.6512&0675-12753600&204.776703&-20.283792&%20&%20&20.3&18.0&1981.196%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66410a7110ad86&-out.add=.&-source=I/252/out&USNO-A2.0===0675-12753677&-out.orig=o' class='full'5	26.169	13 39 06.88080	-20 17 21.1308	0675-12753677	204.778670	-20.289203			16.9	16.7	1954.249

Note: The Guide Star Catalog has been constructed to support the operational need of the Hubble Space Telescope. It contains over 25 million positions for about 19 million objects, of which more than 15 million are classified as stars. The version 1.2 is a new astrometric reduction which results in absolute position errors about 0.3-0.4 arcsec. (see GSC pages at URL http://www-gsss.stsci.edu/gsc/gsc.html)

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	18.59	13 39 06.2520	-20 17 23.928	0613000280	204.77605	-20.28998	0.3	14.57	0.23	0	3	0178	1977.153
2	25.37	13 39 06.8112	-20 17 21.876	0613000269	204.77838	-20.28941	0.4	14.75	0.23	0	3	0178	1977.153

%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

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	18.47	13 39 06.2448	-20 17 23.856	0613000280	204.77602	-20.28996	0.3	14.58	0.24	0	3	1977.153
2	25.25	13 39 06.8040	-20 17 21.768	0613000269	204.77835	-20.28938	0.4	14.76	0.24	0	3	1977.153

%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

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">

%22> Full

">  _r
arcsec _RAJ2000
"h:m:s" _DEJ2000
"d:m:s"GSC2.2

RA(ICRS)
degDE(ICRS)
degEpoch
yrRmag
mage_
magBjmag
mage_
magClass

a
pixe

118.28213 39 06.23712-20 17 23.6544S2030013249204.775988-20.2899041993.29012.44 0.3311.61 0.253 13.65 0.42 223.62213 39 03.37872-20 17 16.7820S20300133204204.764078-20.2879951993.29018.15 0.3319.35 0.273 3.16 0.06 %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	12.347	13 39 05.58672	-20 17 25.8504	0697-0287302	204.773278	-20.290514	247	203	1967.2	0	0	3	17.70	17.54			17.15
2	13.374	13 39 05.76480	-20 17 24.9324	0697-0287304	204.774020	-20.290259	247	5	1980.2	-14	10	3	15.66			16.64	16.21
3	14.044	13 39 05.81136	-20 17 25.2024	0697-0287306	204.774214	-20.290334	999	122	1967.2	0	0	3	15.52	16.96			15.88
4	17.064	13 39 05.75208	-20 17 29.9904	0697-0287303	204.773967	-20.291664	661	895	1973.7	0	0	2		17.40			17.15
5	17.547	13 39 05.80080	-20 17 30.0912	0697-0287305	204.774170	-20.291692	999	999	1973.7	0	0	2		17.60			17.25
6	18.192	13 39 06.20472	-20 17 24.3816	0697-0287311	204.775853	-20.290106	290	191	1974.4	0	0	5	14.20	12.60	10.69	11.43	11.92
7	21.136	13 39 06.12072	-20 17 30.9300	0697-0287310	204.775503	-20.291925	999	999	1973.7	0	0	2		18.34			17.94
8	23.097	13 39 03.41688	-20 17 17.0628	0697-0287295	204.764237	-20.288073	54	170	1974.4	12	4	5	20.29	18.14	19.06	18.26	17.78
9	23.505	13 39 06.40944	-20 17 02.2128	0697-0287312	204.776706	-20.283948	130	210	1974.8	0	-20	3		19.59	20.52	19.47
10	23.838	13 39 06.69480	-20 17 22.1028	0697-0287314	204.777895	-20.289473	999	249	1980.2	0	0	3	17.87			14.99	16.01
11	24.793	13 39 06.47400	-20 17 01.2732	0697-0287313	204.776975	-20.283687	215	674	1985.2	0	0	2			20.56	19.56
12	25.571	13 39 06.83088	-20 17 21.5628	0697-0287315	204.778462	-20.289323	473	168	1967.2	0	0	3	17.16	16.51			15.67

%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