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)
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2001AJ....121.1752M
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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	0.10	19 53 24.8352	-26 56 35.412	0689901337	298.35348	-26.94317	0.4	8.92	0.40	0	3	06ST	1974.558
2	0.93	19 53 24.8808	-26 56 36.240	0689901337	298.35367	-26.94340	0.6	8.80	0.40	0	0	01D4	1976.412

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	0.07	19 53 24.8352	-26 56 35.448	0689901337	298.35348	-26.94318	0.4	8.93	0.40	0	3	1974.558
2	0.69	19 53 24.8640	-26 56 36.096	0689901337	298.35360	-26.94336	0.6	8.80	0.42	0	0	1976.412

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"	GSC2.2	RA(ICRS) deg	DE(ICRS) deg	Epoch yr	Rmag mag	e_ mag	Bjmag mag	e_ mag	Class	a pix	e
1	1.574	19 53 24.86640	-26 56 37.0176	S3330001849	298.353610	-26.943616	1991.080			9.84	0.03	0

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"	GSC2.3	RAJ2000 deg	DEJ2000 deg	Epoch yr	Vmag mag
1	1.544	19 53 24.86472	-26 56 36.9924	SCG1059503	298.353603	-26.943609	2000.000	8.05
2	1.544	19 53 24.86472	-26 56 36.9924	SCG1058743	298.353603	-26.943609	2000.000	8.05
3	1.544	19 53 24.86472	-26 56 36.9924	SCG1058742	298.353603	-26.943609	2000.000	8.05
4	1.544	19 53 24.86472	-26 56 36.9924	SCG1057818	298.353603	-26.943609	2000.000	8.05
5	1.544	19 53 24.86472	-26 56 36.9924	SCG1022657	298.353603	-26.943609	2000.000	8.05
6	1.544	19 53 24.86472	-26 56 36.9924	SCG1057299	298.353603	-26.943609	2000.000	8.05
7	1.567	19 53 24.86664	-26 56 37.0104	SCG1000849	298.353611	-26.943614	2000.000	8.22

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	gmag mag	rmag mag	imag mag	zmag mag	ymag mag	Jmag mag	Hmag mag	Ksmag mag	W1mag mag	W2mag mag	W3mag mag	W4mag mag	NUVmag mag
1	0.521	19 53 24.8071080000	-26 56 35.762424000	SCG1078897	298.35336295000	-26.94326734000	2333000178897	2013.920	3				8.265	7.728	8.189	7.553		11.185
2	1.325	19 53 24.8606400000	-26 56 36.780000000	SCG1134643	298.35358600000	-26.94355000000	23330001134643	1998.084	3
3	1.557	19 53 24.8990400000	-26 56 34.142352000	SCG1134644	298.35374600000	-26.94281732000	23330001134644	2013.530	3				13.150	13.234
4	1.902	19 53 24.8644530323	-26 56 36.978534488	SCG1000849	298.35367502074	-26.94369483321	23330001849	2015.500	0	7.638506	9.370000	8.050000		7.975	7.578	7.300	6.5353	5.779	5.052	4.935	4.886	4.793	4.896	4.836	17.779
5	2.640	19 53 25.0374000000	-26 56 35.468340000	SCG1080627	298.35432250000	-26.94318565000	2333000180627	2011.405	3				13.234				11.3837	11.222
6	2.980	19 53 25.0267464000	-26 56 33.858312000	SCG1133856	298.35427811000	-26.94273842000	23330001133856	2013.172	3					13.701	13.555	12.151
7	3.042	19 53 24.9559920000	-26 56 38.100804000	SCG1133945	298.35398330000	-26.94391689000	23330001133945	2011.297	3							7.683	6.6061
8	3.136	19 53 24.7497408000	-26 56 38.378652000	SCG1135101	298.35312392000	-26.94399407000	23330001135101	2013.570	3				13.023	7.589
9	3.156	19 53 24.6572904000	-26 56 33.485424000	SCG1134880	298.35273871000	-26.94263484000	23330001134880	2011.135	3					9.844	14.139		13.5542
10	3.566	19 53 24.7791432000	-26 56 32.011980000	SCG1135049	298.35324643000	-26.94222555000	23330001135049	2009.009	3						14.110
11	3.596	19 53 25.1050896000	-26 56 34.881036000	SCG1135068	298.35460454000	-26.94302251000	23330001135068	2012.865	3					13.827	13.899		12.6938
12	4.439	19 53 24.6806376000	-26 56 39.378516000	SCG1135132	298.35283599000	-26.94427181000	23330001135132	2014.073	3						13.324	13.010	12.5908

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	19 53 24.8400	-26 56 35.484	0689901337	298.35350	-26.94319	0.4	8.93	0.40	0	3
2	0.80	19 53 24.8136	-26 56 36.204	0689901337	298.35339	-26.94339	0.6	8.80	0.42	0	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