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	0.80	02 46 10.1088	-15 04 23.520	0586300970	041.54212	-15.07320	0.3	10.75	0.25	0	3	00BD	1982.807

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.

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Post annotation The HST Guide Star Catalog, Version GSC-ACT (Lasker+ 1996-99)
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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	0.82	02 46 10.1064	-15 04 23.484	0586300970	041.54211	-15.07319	0.3	10.75	0.27	0	3	1982.807

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.

I/271/out
Post annotation The GSC 2.2 Catalogue (STScI, 2001)
ReadMe+ftp

metaI/271/out

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"	GSC2.2	RA(ICRS) deg	DE(ICRS) deg	Epoch yr	Rmag mag	e_ mag	Bjmag mag	e_ mag	Class	a pix	e
1	0.986	02 46 10.11000	-15 04 23.3184	S0313230130	041.542125	-15.073144	1982.809			9.85	0.28	0	17.87	0.26

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)
ReadMe+ftp
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"	GSC2.3	RAJ2000 deg	DEJ2000 deg	Epoch yr	Fmag mag	jmag mag	Vmag mag	Nmag mag	Class	a pix	e
1	0.993	02 46 10.11000	-15 04 23.3112	S2R0000130	041.542125	-15.073142	1982.809		9.85		8.66	3	17.87	0.26

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	OMag mag	Bjmag mag	Npgmag mag	Bmag mag	Vmag mag	umag mag	gmag mag	rmag mag	imag mag	zmag mag	ymag mag	Jmag mag	Hmag mag	Ksmag mag	W1mag mag	W2mag mag	W3mag mag	W4mag mag	FUVmag mag	NUVmag mag	a pix	e pix	PA pix
1	0.988	02 46 10.0963252323	-15 04 23.229345874	S2R0000130	041.54212570190	-15.07314395905	20313230130	1982.810	3		10.108700	9.854910	8.663990					13.333	12.999	12.775		12.946	12.125	11.748							17.865	0.256	108.6
2	1.009	02 46 10.0104865512	-15 04 24.142112616	S2R0063781	041.54171036063	-15.07337280906	2031323063781	2006.000	4																				20.332	19.260
3	1.012	02 46 10.1088688464	-15 04 23.282934852	S2R0013134	041.54212028686	-15.07313414857	2031323013134	2015.500	0	16.700445				15.223000	14.171000	17.892	16.337	13.239	13.140	15.069	14.6945				10.724	10.773	10.135	8.740
4	1.373	02 46 10.1421600000	-15 04 23.167200000	S2R0013320	041.54225900000	-15.07310200000	2031323013320	2000.779	0													11.014	10.309	10.084
5	3.880	02 46 10.1244000000	-15 04 20.377200000	S2R0062775	041.54218500000	-15.07232700000	2031323062775	2014.787	3						17.773001														20.174	19.427

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	02 46 10.0800	-15 04 24.204	0586300970	41.54200	-15.07339	0.3	10.75	0.27	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