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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metaI/252/out

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	0.663	1050-17497951	305.878056	+20.767737			17.0	17.2	1951.514

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)
ReadMe+ftp

metaI/271/out

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	0.582	N031233355540	305.877975	+20.767837	1990.707	17.61	0.44	17.50	0.43	0	2.31	0.20

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)
ReadMe+ftp
2003AJ....125..984M
metaI/284/out

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	0.417	1107-0509795	305.877970	+20.767770	69	30	1971.0	0	0	4	17.20	17.45	17.39	17.74

Note: The Naval Observatory Merged Astrometric Dataset (NOMAD) contains astrometric and photometric data for over 1 billion stars derived from the Hipparcos (I/239), Tycho-2 (I/259), UCAC2 (I/289), and USNO-B1.0 (I/284) catalogs for astrometry and optical photometry, supplemented by 2MASS (II/246) near-infrared photometry.
An efficient remote query program findnomad1 is available in the cdsclient package, for Unix/Linux platforms

I/297/out NOMAD Catalog (Zacharias+ 2005)
ReadMe+ftp
2004AAS...205.4815Z
metaI/297/out

The NOMAD-1 Catalog (1117612732 rows)

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Full	_r arcsec	NOMAD1	YM	RAJ2000 deg	DEJ2000 deg	r	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Bmag mag	r_	Vmag mag	r_	Rmag mag	r_	Jmag mag	Hmag mag	Kmag mag	R
1	0.415	1107-0548118	..	305.8779694	+20.7677694	B	0.0	0.0	0.0	0.0	17.390	B			17.740	B

Note: Zone -30/+50deg

I/304/out Carlsberg Meridian Catalog 14 (CMC14) (CMC, 2006)
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metaI/304/out

The full CMC-14 catalog (around 95.85million sources in the region -30 to +50°) (95858475 rows)

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Full	_r arcsec	CMC14	f_	RAICRS deg	DEICRS deg	r'mag mag	Nt	Jmag mag	Hmag mag	Ksmag mag
1	0.135	202330.6+204603		305.877822	+20.767727	16.762	2

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 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	GSC2.3	RAJ2000 deg	DEJ2000 deg	Epoch yr	Fmag mag	jmag mag	Vmag mag	Nmag mag	Class	a pix	e
1	0.587	N2PR055540	305.877976	+20.767838	1990.707	17.61	17.50	16.86		0	2.31	0.20

I/317/sample

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	RAJ2000 deg	DEJ2000 deg	FW1 309.05nJy	FW2 167.66nJy	e_FW1 309.05nJy	e_FW2 167.66nJy	q_W1	q_W2	fFW1	fFW2
1	1.115	3051p212o0199195	305.8781650	+20.7675941	0.0000e+00	5.3658e+04	0.0000e+00	1.0195e+02	0.00000	1.00000	0.0000	0.6426
2	2.680	3051p212o0130258	305.8778714	+20.7684603	1.7766e+04	0.0000e+00	2.8107e+01	0.0000e+00	1.00000	0.00000	0.5914	0.0000
3	2.827	3051p212o0130238	305.8773960	+20.7670617	1.9790e+04	0.0000e+00	2.8004e+01	0.0000e+00	1.00000	0.00000	0.6668	0.0000
4	4.751	3051p212o0201733	305.8766013	+20.7671192	0.0000e+00	3.3658e+04	0.0000e+00	8.7472e+01	0.00000	1.00000	0.0000	0.5080
5	4.754	3051p212o0119559	305.8792298	+20.7673937	1.4283e+04	0.0000e+00	2.5147e+01	0.0000e+00	1.00000	0.00000	0.5813	0.0000

Full	_r arcsec	RA_ICRS deg	e_ arcsec	DE_ICRS deg	e_ arcsec	Name	nW1	mW1	nW2	mW2	RAPMdeg deg	e_ arcsec	DEPMdeg deg	e_ arcsec	pmRA arcsec/yr	e_ (...)	pmDE arcsec/yr	e_ (...)	snrW1pm	snrW2pm	FW1pm ct	e_ ct	FW2pm ct	e_ ct	W1mproPM mag	W2mproPM mag	pmQual	Dist arcsec	ka	k1	k2	km	WISEA
1	0.216	305.8779210	0.0932	+20.7676966	0.1257	J202330.69+204603.6	4	12	4	12	305.8779216	0.1984	20.7676860	0.1804	0.05112	0.0284	0.00484	0.0263	2.4	5.8	5.8e+03	2e+03	1.6e+04	3e+03	13.090	11.991	3N000	6.041	1	1	1	1	WISEA
2	1.851	305.8774693	0.0670	+20.7673545	0.0653	J202330.59+204602.4	2	3	3	3	305.8774626	0.0212	20.7673447	0.0208	-0.00348	0.0051	0.01146	0.0049			-1.8e+04	2e+02	-5.8e+04	5e+02	15.838	15.053	3N000	3.517	1	1	1	1	WISEA
3	2.751	305.8775249	0.2263	+20.7684127	0.2654	J202330.60+204606.2	3	3	3	3	305.8775182	0.0398	20.7684029	0.0499	-0.00348	0.0090	0.01146	0.0072			-7.2e+03	2e+02	-2.7e+04	8e+02	15.750	14.532	3N000	3.230	1	1	1	1	WISEA