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	0.661	1125-00058207	002.233675	+27.533709			14.0	13.2	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	0.45	0173502007	002.23353	+27.53368	0.2	13.76	0.40	1	0	0384	1983.686
2	0.45	0173502007	002.23344	+27.53363	0.3	13.46	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	0.20	0173502007	002.23350	+27.53358	0.3	13.47	0.40	1	0	1983.776
2	0.47	0173502007	002.23366	+27.53365	0.2	13.80	0.40	1	0	1983.686

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

I/267/out The APM-North Catalogue (McMahon+, 2000)
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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	0.364	EO0205-0017180	002.233625	+27.533639	12.92		-1	0.35	15.3	0.04	13.91		-1	-0.35	15.2	0.99
2	0.400	EO0779-0019812	002.233581	+27.533667	11.73		-1	-0.72	12.5	0.03	12.47		-1	-0.17	17.5	0.74

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	0.100	N3221313479	002.233530	+27.533572	1991.776	13.24	0.42	14.01	0.43	0	5.04	0.07

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	0.314	1175-0003410	002.233475	+27.533606	107	112	1977.2	-14	-6	5	13.98	13.05	13.68	12.82	12.72

I/285/gpm

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	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	Class	Gmag mag	OMag mag	Bjmag mag	Fpgmag mag	Epgmag mag	Npgmag mag	Umag mag	Bmag mag	Vmag mag	umag mag	gmag mag	rmag mag	imag mag	zmag mag	ymag mag	Jmag mag	Hmag mag	Ksmag mag	Zmag mag	Ymag mag	W1mag mag	W2mag mag	W3mag mag	W4mag mag	FUVmag mag	NUVmag mag	a pix	e pix	PA pix
1	0.214	NBJR000479	002.23350610465	+27.53351913716	13221313479	2015.500	0	13.554414	14.008500	14.011600	13.239600		13.050500		14.170000	13.647000	15.015	13.838	13.544		13.490	13.4539	12.633	12.363	12.304			12.256	12.303	11.957	9.192			5.044	0.067	12.2
2	2.484	NBJR053240	002.23303346000	+27.53406860000	1322131353240	2012.511	3												19.423	18.966

Full	_r arcsec	RAJ2000 deg	DEJ2000 deg	objID	f_objID	Qual	e_RAJ2000 (...)	e_DEJ2000 arcsec	Epoch d	Ns	Nd	gmag mag	e_ mag	gKmag mag	e_ mag	gFlags	rmag mag	e_ mag	rKmag mag	e_ mag	rFlags	imag mag	e_ mag	iKmag mag	e_ mag	iFlags	zmag mag	e_ mag	zKmag mag	e_ mag	zFlags	ymag mag	e_ mag	yKmag mag	e_ mag	yFlags
1	0.198	002.233510520	+27.533521550	141040022335570782	503635968	60	0.0099	0.0135	55899.663680560	10	56	13.8384	0.0032	13.8823	0.0028	115000	13.5438	0.0004	13.5929	0.0008	115000	13.4540				114724	13.4903	0.0023	13.5080	0.0014	115000	13.4539	0.0042	13.4726	0.0017	115000
2	2.484	002.233033460	+27.534068600	141040022327751460	310456320	37	0.0243	0.0243	56205.510995370	0	3					0	19.4233	0.0285	18.9836	0.0239	4120	18.9663	0.0191			16777752					0					0

Full	_r arcsec	mode	q_	cl	SDSS9	m_	Im	RA_ICRS deg	DE_ICRS deg	ObsDate yr	Q	umag mag	e_ mag	gmag mag	e_ mag	rmag mag	e_ mag	imag mag	e_ mag	zmag mag	e_ mag	zsp
1	0.052	1	+	6	J000856.05+273200.7		Im	002.233553	+27.533544	2003.7432	3	15.020	0.004	13.872	0.003	13.529	0.003	15.101	0.012	13.427	0.003
2	0.144	2		6	J000856.04+273200.6		Im	002.233535	+27.533523	2009.7916	3	15.037	0.004	13.835	0.003	13.523	0.003	13.893	0.003	13.415	0.003

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	0.040	1237663308529532985	002.233559	+27.533547	3	6	0	0.000	0.000	15.012	13.869	13.525	15.102	13.428	0.004	0.003	0.003	0.012	0.003	3	SDSS J000856.05+273200.7	52911.2109
2	0.044	1237663308529532986	002.233560	+27.533546	4	6	0	0.000	0.000	15.198	13.996	13.537	15.184	13.428	0.004	0.003	0.003	0.012	0.003	3	SDSS J000856.05+273200.7	52911.2109
3	0.052	1237663308529532988	002.233553	+27.533544	3	6	0	0.000	0.000	15.015	13.869	13.525	15.103	13.431	0.004	0.003	0.003	0.012	0.003	3	SDSS J000856.05+273200.7	52911.2109
4	0.052	1237663308529532989	002.233553	+27.533544	1	6	1	0.000	0.000	15.015	13.869	13.525	15.103	13.430	0.004	0.003	0.003	0.012	0.003	3	SDSS J000856.05+273200.7	52911.2109
5	0.144	1237680276871381066	002.233535	+27.533523	3	6	0	0.001	0.001	15.024	13.835	13.520	13.886	13.415	0.004	0.003	0.003	0.003	0.003	3	SDSS J000856.04+273200.6	55120.3785
6	0.144	1237680276871381067	002.233535	+27.533523	2	6	0	0.001	0.001	15.024	13.835	13.520	13.887	13.415	0.004	0.003	0.003	0.003	0.003	3	SDSS J000856.04+273200.6	55120.3785
7	0.178	1237680276871381062	002.233540	+27.533511	3	6	0	0.001	0.001	15.020	13.835	13.520	13.887	13.413	0.004	0.003	0.003	0.003	0.003	3	SDSS J000856.04+273200.6	55120.3785
8	0.187	1237680276871381063	002.233535	+27.533510	4	6	0	0.000	0.001	15.176	14.150	13.582	13.908	13.421	0.005	0.003	0.003	0.003	0.003	3	SDSS J000856.04+273200.6	55120.3785
9	1.084	1237663308529532987	002.233424	+27.533835	4	6	0	0.009	0.006	16.651	16.081	17.907	16.152	20.406	0.013	0.005	0.038	0.021	0.481	3	SDSS J000856.02+273201.8	52911.2109
10	1.119	1237680276871381065	002.233906	+27.533586	4	3	0	0.002	0.004	17.211	15.469	16.601	22.930	18.787	0.016	0.003	0.008	0.891	0.186	3	SDSS J000856.13+273200.9	55120.3785
11	1.408	1237680276871381064	002.233120	+27.533505	4	3	0	0.084	0.085	19.823	24.784	24.590	16.639	21.840	0.095	0.835	1.133	0.007	0.813	3	SDSS J000855.94+273200.6	55120.3785