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	0.21	04 25 36.3888	+07 28 55.992	0008100285	066.40162	+07.48222	0.2	14.13	0.40	1	0	00ZV	1982.880

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	0.28	04 25 36.3840	+07 28 56.028	0008100285	066.40160	+07.48223	0.2	14.16	0.40	1	0	1982.880

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	0.132	04 25 36.38976	+07 28 55.9056	N30312107	066.401624	+07.482196	1986.768	13.13	0.43	14.36	0.42	0	5.47	0.28

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
metaI/305/out

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	0.132	04 25 36.39000	+07 28 55.9092	NA5G000007	066.401625	+07.482197	1986.768	13.13	14.36	13.92	12.97	0	5.47	0.28

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	Fpgmag 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	a pix	e pix	PA pix
1	0.174	04 25 36.3974919573	+07 28 55.984135071	NA5G029224	066.40165621649	+07.48221781530	1303121029224	2006.831	3								24.635	25.113	18.168	14.276	22.826					12.397	12.413	11.988	8.734
2	0.745	04 25 36.4294287766	+07 28 56.218866885	NA5G000007	066.40183429005	+07.48226733469	130312107	2015.500	0	13.989158	14.384300	14.360100	13.126200	12.973300	14.745000	14.286000	15.939	14.435	14.129	13.979	13.839	13.7725	13.018	12.688	12.575					5.475	0.276	145.6
3	3.897	04 25 36.1655775129	+07 28 53.635864781	NA5G012303	066.40072455029	+07.48159549121	1303121012303	2015.500	0	16.942413							19.959	17.712	16.895	16.575	16.438	16.2927	15.271	14.649	14.555

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	04 25 36.3960	+07 28 55.812	0008100285	66.40165	7.48217	0.2	14.16	0.40	1	0

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