VizieR

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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.

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USNO-A2.0

RAJ2000
deg

DEJ2000
deg

ACTflag

Mflag

Bmag
mag

Rmag
mag

Epoch
yr

1 3.175 21 33 31.18344 -20 31 36.4008 0675-36488309 323.379931 -20.526778 11.5 11.4 1982.514

%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
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PosErr
arcsec

Pmag
mag

e_
mag

n_

Class

Plate

Epoch
yr

1 3.06 21 33 31.1712 -20 31 36.120 0636900617 323.37988 -20.52670 0.4 13.46 0.40 0 0 0171 1980.529

2 3.16 21 33 31.1808 -20 31 36.300 0636900617 323.37992 -20.52675 0.3 13.38 0.40 0 3 04OA 1977.550

%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
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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	3.175	21 33 31.18344	-20 31 36.4008	0675-36488309	323.379931	-20.526778			11.5	11.4	1982.514

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	3.06	21 33 31.1712	-20 31 36.120	0636900617	323.37988	-20.52670	0.4	13.46	0.40	0	0	0171	1980.529
2	3.16	21 33 31.1808	-20 31 36.300	0636900617	323.37992	-20.52675	0.3	13.38	0.40	0	3	04OA	1977.550

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%3cBR%3e%0a%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%203.07&%3cFONT%20COLOR=%27#CD5B45%27>21%2033%2031.1736&%3cFONT%20COLOR=%27#CD5B45%27>-20%2031%2036.228&0636900617&323.37989&-20.52673&%200.3&13.38&%200.40&%200&3&1977.550%3cBR%3e%0a%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%203.25&%3cFONT%20COLOR=%27#CD5B45%27>21%2033%2031.1832&%3cFONT%20COLOR=%27#CD5B45%27>-20%2031%2036.012&0636900617&323.37993&-20.52667&%200.4&13.48&%200.41&%200&0&1980.529%3cBR%3e%0a %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	3.040	21 33 31.16208	-20 31 35.7924	S331233399	323.379842	-20.526609	1991.742	12.40	0.16	12.79	0.35	3	9.33	0.22

%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	2.279	21 33 31.12008	-20 31 36.5124	0694-0841902	323.379667	-20.526809	252	304	1974.9	0	0	2		11.24		11.40
2	2.891	21 33 31.15416	-20 31 35.9220	0694-0841903	323.379809	-20.526645	146	393	1973.7	-12	24	5	13.78	11.63	12.25	11.59	11.76
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%202.891&%3cFONT%20COLOR=%27#CD5B45%27>21%2033%2031.15416&%3cFONT%20COLOR=%27#CD5B45%27>-20%2031%2035.9220&0694-0841903&323.379809&-20.526645&146&393&1973.7&%20%20%20-12&%20%20%20%2024&5&13.78&11.63&12.25&11.59&11.76%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663ea6e427a99&-out.add=.&-source=I/284/out&USNO-B1.0===0694-0841899&-out.orig=o' class='full'3 3.73921 33 30.70152-20 31 37.77240694-0841899323.377923-20.5271594729991954.4 0 0219.3417.92 4 6.19521 33 30.66216-20 31 32.31120694-0841897323.377759-20.5256424029991954.4 0 0220.7318.32 5 6.68921 33 30.58008-20 31 40.91160694-0841894323.377417-20.5280319999991954.4 0 0218.7119.12 6 7.92721 33 30.50472-20 31 41.56320694-0841892323.377103-20.5282123389991963.1 -38 112320.6918.9919.83 %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	2.278	21 33 31.120008	-20 31 36.50988	0694-0913544	YM	323.3796667	-20.5268083	B	0.0	0.0	0.0	0.0	16.970	Y	15.030	Y	11.400	B	14.478	13.810	13.493
2	2.889	21 33 31.153992	-20 31 35.91984	0694-0913545	..	323.3798083	-20.5266444	B	-12.0	4.0	24.0	12.0	12.250	B			11.590	B
3	3.741	21 33 30.701328	-20 31 37.76988	0694-0913541	..	323.3779222	-20.5271583	B	0.0	0.0	0.0	0.0	19.340	o			17.920	e
4	6.197	21 33 30.661992	-20 31 32.31012	0694-0913539	..	323.3777583	-20.5256417	B	0.0	0.0	0.0	0.0	20.730	o			18.320	e
5	6.689	21 33 30.580008	-20 31 40.91016	0694-0913536	..	323.3774167	-20.5280306	B	0.0	0.0	0.0	0.0	18.710	o			19.120	e
6	7.926	21 33 30.504672	-20 31 41.55996	0694-0913534	..	323.3771028	-20.5282111	B	-38.0	8.0	112.0	60.0	19.830	B			18.990	e
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6	7.926	21 33 30.504672	-20 31 41.55996	0694-0913534	..	323.3771028	-20.5282111	B	-38.0	8.0	112.0	60.0	19.830	B			18.990	e

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Note: Zone -30/+50deg

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r'mag
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mag

Hmag
mag

Ksmag
mag

1 2.930 21 33 31.16544 -20 31 36.3720 213331.1-203136 323.379856 -20.526770 15.664 1 14.479 13.494

%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
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mag

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mag

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mag

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e

1 3.046 21 33 31.16232 -20 31 35.7852 SC73000099 323.379843 -20.526607 1991.742 12.40 12.72 13.17 3 9.33 0.22

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Target Name (resolved by Sesame) or Position:	Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)	Radius Box size