VizieR

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The 3 columns 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	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	USNO-A2.0	RAJ2000 deg	DEJ2000 deg	ACTflag	Mflag	Bmag mag	Rmag mag	Epoch yr
1	9.475	16 23 11.85888	-76 54 26.4422	0075-05322568	245.799412	-76.907345			18.1	17.7	1981.384

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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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	9.295	16 23 11.76792	-76 54 26.1900	S21013003858	245.799033	-76.907275	1991.288	17.92	0.43	18.82	0.29	3	2.24	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)
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	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	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	9.560	16 23 11.87616	-76 54 26.3628	0130-0139354	245.799484	-76.907323	109	81	1987.6	0	0	4		17.55	18.44	17.76	18.10
2	9.887	16 23 11.69014	-76 54 35.7299	0130-0139351	245.798709	-76.909925	999	379	1990.3	0	0	2		19.38		24.43

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)
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2004AAS...205.4815Z
metaI/297/out

The NOMAD-1 Catalog (1117612732 rows)

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	NOMAD1	RAJ2000 deg	DEJ2000 deg	YM	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	9.561	16 23 11.875992	-76 54 26.35992	0130-0141196	245.7994833	-76.9073222	..	B	0.0	0.0	0.0	0.0	18.440	B			17.760	B
2	9.886	16 23 11.689992	-76 54 35.73000	0130-0141193	245.7987083	-76.9099250	..	B	0.0	0.0	0.0	0.0					24.430	B

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	_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	9.298	16 23 11.76816	-76 54 26.1864	S774003858	245.799034	-76.907274	1991.288	17.92	18.82		17.55	3	2.24	0.07

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	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	SrcID	RAJ2000 deg	DEJ2000 deg	Name	PriOrSec	Y-Jpnt mag	J-Hpnt mag	H-Kspnt mag	J-Kspnt mag	Y-Jext mag	J-Hext mag	H-Ksext mag	J-Ksext mag	Mclass	AY mag	AJ mag	AH mag	AKs mag	Ypmag mag	Yap3 mag	Yapc3	Yavgap3	Yperrbits	Jpmag mag	Jap3 mag	Japc3 mag	Javgap3	Jperrbits	Hpmag mag	Hap3 mag	Hapc3 mag	Havgap3	Hperrbits	Kspmag mag	Ksap3 mag	Ksapc3 mag	Ksavgap3	Ksperrbits
1	3.130	16 23 08.46387	-76 54 31.5145	472959138170	245.785266	-76.908754	VHS J162308.46-765431.5	0									-1	0.1552	0.1100	0.0701	0.0460					0	19.5140	19.3964	19.6988	99.851	0					0					0
2	9.399	16 23 11.82239	-76 54 26.3478	472959138050	245.799260	-76.907319	VHS J162311.82-765426.3	0				0.3894				0.5011	-1	0.1549	0.1098	0.0700	0.0459					0	17.0440	16.9388	17.2412	99.645	0					0	16.5781	16.5494	16.7402	98.528	0