VizieR

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The 1 column 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.

I/252/out The USNO-A2.0 Catalogue (Monet+ 1998)
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The Full Catalogue (526280881 rows) (Note)

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Full	_r arcsec	USNO-A2.0	RAJ2000 deg	DEJ2000 deg	ACTflag	Mflag	Bmag mag	Rmag mag	Epoch yr
1	0.519	1125-00058850	002.257742	+27.549759			15.0	13.8	1950.611

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 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	GSC	RAJ2000 deg	DEJ2000 deg	PosErr arcsec	Pmag mag	e_ mag	n_	Class	Plate	Epoch yr
1	0.50	0173501868	002.25763	+27.54972	0.2	14.50	0.40	1	0	0384	1983.686
2	0.54	0173501868	002.25757	+27.54957	0.3	14.09	0.40	1	0	02CZ	1983.776

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 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	GSC	RAJ2000 deg	DEJ2000 deg	PosErr arcsec	Pmag mag	e_ mag	n_	Class	Epoch yr
1	0.29	0173501868	002.25776	+27.54969	0.2	14.50	0.40	1	0	1983.686
2	0.42	0173501868	002.25763	+27.54954	0.3	14.10	0.40	1	0	1983.776

Note: The current version includes only the North (POSS-I plates)

I/267/out The APM-North Catalogue (McMahon+, 2000)
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metaI/267/out

The Full Northern APM Catalogue (166466987 rows)

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Full	_r arcsec	APM-ID	RAJ2000 deg	DEJ2000 deg	rmag mag	l_	rClass	rStel	rDiam arcsec	rEll	bmag mag	l_	bClass	bStel	bDiam arcsec	b-r mag	Mflag
1	0.408	EO0779-0018968	002.257650	+27.549703	12.67		-1	-0.72	11.3	0.04	12.36		2	19.39	30.2	-0.31	*
2	3.459	EO0205-0016465	002.256764	+27.550050	12.50		2	20.72	27.9	0.62	15.01		-1	0.53	13.4	2.51	*

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 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	GSC2.2	RA(ICRS) deg	DE(ICRS) deg	Epoch yr	Rmag mag	e_ mag	Bjmag mag	e_ mag	Class	a pix	e
1	0.155	N3221313472	002.257687	+27.549596	1991.776	13.90	0.42	14.86	0.43	0	4.27	0.03

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.

I/284/out The USNO-B1.0 Catalog (Monet+ 2003)
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2003AJ....125..984M
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The Whole-Sky USNO-B1.0 Catalog of 1,045,913,669 sources (1045175762 rows)

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Full	_r arcsec	USNO-B1.0	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 mas	e_DEJ2000 mas	Epoch yr	pmRA mas/yr	pmDE mas/yr	Ndet	B1mag mag	R1mag mag	B2mag mag	R2mag mag	Imag mag
1	0.270	1175-0003443	002.257706	+27.549687	56	76	1977.2	0	0	5	14.86	13.54	14.72	13.44	13.24

Note: More recent versions available: UCAC3 (I/315) and UCAC4 (I/322); see also the UCAC home page at http://ad.usno.navy.mil/ucac/

I/289/out UCAC2 Catalogue (Zacharias+ 2004)
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2004AJ....127.3043Z
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The Second U.S. Naval Observatory CCD Astrograph Catalog (48330571 rows)

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Full	_r arcsec	2UCAC	RAJ2000 deg	e_ mas	DEJ2000 deg	e_ mas	UCmag mag	No	Nc	pmRA mas/yr	pmDE mas/yr	2Mkey	Jmag mag	Kmag mag
1	0.030	41476713	002.2577392	15	+27.5496117	41	14.09	4	2	4.0	-6.7	1286823286	12.941	12.468

I/290/pul3

Pulkovo catalogue of 58483 stars (Pul-3) (Khrutskaya+, 2003)

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

Full	_r arcsec	objID	RA_ICRS deg	DE_ICRS deg	mode	class	clean	e_RA_ICRS (...)	e_DE_ICRS (...)	umag mag	gmag mag	rmag mag	imag mag	zmag mag	e_umag mag	e_gmag mag	e_rmag mag	e_imag mag	e_zmag mag	Q	SDSS16	MJD d
1	0.041	1237663308529532966	002.257743	+27.549612	3	6	0	0.001	0.001	16.378	14.822	14.191	14.002	13.918	0.006	0.003	0.003	0.003	0.004	3	SDSS J000901.85+273258.6	52911.2109
2	0.041	1237663308529532967	002.257743	+27.549612	4	6	0	0.001	0.001	16.383	14.856	14.205	14.021	13.920	0.006	0.003	0.003	0.003	0.004	3	SDSS J000901.85+273258.6	52911.2109
3	0.050	1237663308529532965	002.257746	+27.549613	3	6	0	0.001	0.001	16.349	14.783	14.173	13.975	13.890	0.006	0.003	0.003	0.003	0.003	3	SDSS J000901.85+273258.6	52911.2109
4	0.104	1237680276871381092	002.257742	+27.549588	3	6	0	0.001	0.001	16.331	14.764	14.192	14.131	13.887	0.007	0.003	0.003	0.008	0.004	3	SDSS J000901.85+273258.5	55120.3785
5	0.104	1237680276871381093	002.257742	+27.549588	1	6	1	0.001	0.001	16.338	14.765	14.193	14.133	13.889	0.007	0.003	0.003	0.008	0.004	3	SDSS J000901.85+273258.5	55120.3785
6	0.150	1237680276871381089	002.257747	+27.549576	3	6	0	0.001	0.001	16.323	14.764	14.192	14.131	13.884	0.007	0.003	0.003	0.008	0.004	3	SDSS J000901.85+273258.4	55120.3785
7	0.150	1237680276871381090	002.257747	+27.549576	4	6	0	0.001	0.001	16.323	14.764	14.192	14.131	13.884	0.007	0.003	0.003	0.008	0.004	3	SDSS J000901.85+273258.4	55120.3785