VizieR

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The 3 columns in color are computed by VizieR, and are not part of the original data.

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)

I/254/out
Post annotation The HST Guide Star Catalog, Version 1.2 (Lasker+ 1996)
ReadMe+ftp
2001AJ....121.1752M
metaI/254/out

The Full Catalogue (25241730 positions) (25241730 rows)

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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	0.18	12 56 48.8904	-08 31 31.908	0553600554	194.20371	-08.52553	0.4	6.23	0.40	0	3	015I	1982.297

Note: The GSC-ACT (or GSC1.3) is a recalibration of the GSC1.1, the catalogue constructed to support the operational need of the Hubble Space Telescope, with the ACT, the combination of the Astrographic Catalogue and the Tycho catalogue derived from the Hipparcos mission; see http://www.projectpluto.com/gsc_act.htm for more details about this recalibration.

I/255/out
Post annotation The HST Guide Star Catalog, Version GSC-ACT (Lasker+ 1996-99)
ReadMe+ftp

metaI/255/out

The GSC-ACT Full Catalogue (25241730 positions) (25241730 rows)

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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	0.24	12 56 48.8856	-08 31 31.908	0553600554	194.20369	-08.52553	0.4	6.24	0.40	0	3	1982.297

I/271/out
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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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No object found around (ICRS) position 12:56:48.9-08:31:32

I/305/out
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The Guide Star Catalog, Version 2.3.2 (GSC2.3) (STScI, 2006)

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2008AJ....136..735L

The Full GSC2.3.2 Catalogue (945592683 objects) (945592683 rows)

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No object found around (ICRS) position 12:56:48.9-08:31:32

I/353/gsc242
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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"	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	Class	Gmag mag	Bmag mag	Vmag mag	umag mag	gmag mag	rmag mag	imag mag	zmag mag	ymag mag	Jmag mag	Hmag mag	Ksmag mag	Ymag mag	W1mag mag	W2mag mag	W3mag mag	W4mag mag
1	0.241	12 56 48.8852760000	-08 31 32.117700000	S6GE040922	194.20368865000	-08.52558825000	2200223240922	2011.945	3					16.576	17.396		15.062
2	0.580	12 56 48.8898834888	-08 31 31.456181028	S6GE010358	194.20370784787	-08.52540449473	2200223210358	2015.500	0	16.409531		16.929001	17.366	15.704	14.733	14.188	13.707		9.605	8.971	8.614	10.538
3	1.445	12 56 48.8781180648	-08 31 30.608070528	S6GE010165	194.20365882527	-08.52516890848	2200223210165	2015.500	0	15.699700	14.968000	13.901000	15.242					14.0770	12.366	11.417	10.824		9.265	8.822	4.189	1.044
4	2.013	12 56 48.9109608000	-08 31 30.010044000	S6GE040433	194.20379567000	-08.52500279000	2200223240433	2010.287	3					16.535		15.024

Note: The Guide Star Catalog has been constructed to support the operational need of the Hubble Space Telescope; it is primarily based on an all-sky, single epoch, single passband collection of Schmidt plates. It contains over 25 million positions for about 19 million objects, of which more than 15 million are classified as stars.

I/220/out
Post annotation The HST Guide Star Catalog, Version 1.1 (Lasker+ 1992)
ReadMe+ftp

metaI/220/out

The Full Catalogue (25258765 positions) (25258765 rows)

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC	RAJ2000 deg	DEJ2000 deg	PosErr arcsec	Pmag mag	e_ mag	n_	Class
1	0.00	12 56 48.9000	-08 31 32.016	0553600554	194.20375	-8.52556	0.4	6.24	0.40	0	3

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