VizieR

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The 7 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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Post annotation The USNO-A2.0 Catalogue (Monet+ 1998)
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metaI/252/out

The Full Catalogue (526280881 rows) (Note)

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	USNO-A2.0	RAJ2000 deg	DEJ2000 deg	ACTflag	Mflag	Bmag mag	Rmag mag	Epoch yr
1	1.148	23 09 55.56144	-68 15 11.2212	23 06 44.07201	-68 31 28.1977	316.18896962	-46.17494625	0150-20310372	347.481506	-68.253117			12.8	12.7	1981.296

Note: The USNO-B Catalog presents positions, proper motions, magnitudes un blue, red and infrared, as well as star/galaxy estimators for 1,045,175,762 objects derived from 3,648,832,040 separate observations. The data were taken from scans of 7,435 Schmidt plates taken from various sky surveys during the last 50 years.
USNO-B1.0 catalog was created by Dave Monet and collaborators at http://www.nofs.navy.mil/data/fchpix/
Note that the star/galaxy estimators may be mixed up in dense regions.

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Post annotation The USNO-B1.0 Catalog (Monet+ 2003)
ReadMe+ftp
2003AJ....125..984M
metaI/284/out

The Whole-Sky USNO-B1.0 Catalog of 1,045,913,669 sources (1045175762 rows)

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	USNO-B1.0	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 mas	e_DEJ2000 mas	Epoch yr	Ndet	R1mag mag	B2mag mag	R2mag mag	Imag mag
1	1.107	23 09 55.55472	-68 15 11.2824	23 06 44.06585	-68 31 28.4729	316.18896860	-46.17492634	0217-0653990	347.481478	-68.253134	220	174	1989.9	4	12.69	13.10	13.28	11.26
2	4.506	23 09 56.13888	-68 15 12.4920	23 06 44.65639	-68 31 29.6921	316.18761437	-46.17514265	0217-0653991	347.483912	-68.253470	694	205	1986.6	2		13.15		16.66
3	4.940	23 09 54.64200	-68 15 08.3808	23 06 43.14371	-68 31 25.5563	316.19130807	-46.17482279	0217-0653989	347.477675	-68.252328	164	415	1990.2	2	14.06			16.74

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.

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Post annotation The GSC 2.2 Catalogue (STScI, 2001)
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The Full GSC2.2.1 Catalogue (455851237 objects) (455851237 rows)

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	GSC2.2	RA(ICRS) deg	DE(ICRS) deg	Epoch yr	Rmag mag	e_ mag	Bjmag mag	e_ mag	Class	a pix	e
1	2.533	23 09 55.79640	-68 15 11.9736	23 06 44.30940	-68 31 28.9540	316.18836618	-46.17497161	S313203047	347.482485	-68.253326	1978.820			12.74	0.33	3	10.92	0.80
2	2.586	23 09 55.81584	-68 15 11.7144	23 06 44.32921	-68 31 28.6951	316.18838728	-46.17504824	S313203048	347.482566	-68.253254	1997.605	13.13	0.43	12.25	0.32	3	18.68	0.74

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.

I/305/out
Post annotation The Guide Star Catalog, Version 2.3.2 (GSC2.3) (STScI, 2006)
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2008AJ....136..735L
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The Full GSC2.3.2 Catalogue (945592683 objects) (945592683 rows)

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	GSC2.3	RAJ2000 deg	DEJ2000 deg	Epoch yr	Fmag mag	jmag mag	Vmag mag	Nmag mag	Class	a pix	e
1	2.534	23 09 55.79664	-68 15 11.9700	23 06 44.30964	-68 31 28.9504	316.18836652	-46.17497265	SAZ0000047	347.482486	-68.253325	1978.820		12.74		14.98	3	10.92	0.80
2	2.587	23 09 55.81608	-68 15 11.7108	23 06 44.32945	-68 31 28.6915	316.18838763	-46.17504928	SAZ0000048	347.482567	-68.253253	1997.605	13.13	12.25			3	18.68	0.74

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The Guide Star Catalog, Version 2.4.2 (GSC2.4.2) (STScI, 2020)

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2008AJ....136..735L

Guide Star Catalogue, Version 2.4.2 (original column names in green) (3485671481 rows)

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	Class	Bjmag mag	Fpgmag mag	Npgmag mag	gmag mag	rmag mag	imag mag	zmag mag	Jmag mag	Hmag mag	Ksmag mag	Ymag mag	W1mag mag	W2mag mag	W3mag mag	W4mag mag	FUVmag mag	NUVmag mag	a pix	e pix	PA pix
1	0.696	23 09 55.4810400000	-68 15 11.343600000	23 06 43.9912508061	-68 31 28.532896813	316.1890921707367	-46.1748494986294	SAZ0016931	347.48117100000	-68.25315100000	2313203016931	1999.910	0					17.830	17.430	16.820	14.045	13.298	13.181	14.461
2	1.858	23 09 55.2398400000	-68 15 09.583200000	23 06 43.7480959812	-68 31 26.768547760	316.1899299744729	-46.1750524950090	SAZ0049641	347.48016600000	-68.25266200000	2313203049641	56939.434	3				18.096	17.834
3	2.531	23 09 55.5905767150	-68 15 11.442793999	23 06 44.5919149546	-68 31 29.898417757	316.1883667779002	-46.1749708403144	SAZ0000047	347.48248291016	-68.25332641602	2313203047	1978.820	0	12.740700		14.978300					15.884	15.065	14.869								10.917	0.804	34.0
4	2.600	23 09 55.8224704145	-68 15 11.711261292	23 06 44.2390256134	-68 31 29.252773850	316.1883805135325	-46.1750468335192	SAZ0000048	347.48257446289	-68.25325775146	2313203048	1997.610	0	12.252100	13.127200										13.338	13.199	9.782	7.608	18.362	17.983	18.680	0.745	21.4

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