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)
ReadMe+ftp

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	4.893	0450-10120027	146.894642	-42.467067	A		11.3	10.5	1981.077

Note: Detailed introduction can be found in intro.tex (see also http://aries.usno.navy.mil/ad/ac.html) Direct links to Hipparcos and Tycho observations are provided from the relevant columns.

I/275/ac2002 The AC 2000.2 Catalogue (Urban+ 2001)
ReadMe+ftp
1998AJ....115.1212U
metaI/275/ac2002

All 4,621,751 stars from the AC2000.2 Catalogue (Detailed introduction) (4621751 rows) (Note)

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Full	_r arcsec	RAJ2000 "h:m:s"	DEJ2000 "d:m:s"	Bmag mag	mEp yr	e_RAJ2000 (...)	e_DEJ2000 arcsec	ACnum	TYC2	Vmag mag
1	3.023	09 47 34.574	-42 28 00.19	11.48	1904.407	0.411	0.076	3624069	770100140301	10.706

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	0.660	0475-0251628	YM	146.8934417	-42.4661139	Y	0.0	0.0	0.0	0.0			17.540	Y			12.327	11.753	11.583

Note:

I/320/spm4 SPM 4.0 Catalog (Girard+, 2011)
ReadMe+ftp
2011AJ....142...15G
metaI/320/spm4

Yale/San Juan Southern Proper Motion Catalog 4 (SPM4) (103319647 rows)

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Full	_r arcsec	SPMID	RAJ2000 deg	e_ mas	DEJ2000 deg	e_ mas	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Epoch yr	N1	N2	Nc	Bmag mag	Vmag mag	Jmag mag	Hmag mag	Kmag mag	2M	igal	A
1	0.739	2871099171	146.8936901	49.9	-42.4661458	45.9	-74.37	1.44	96.89	1.31	1971.22	9	0	0	15.52	14.44	12.328	11.753	11.584	2M	0	A

Note:

I/324/igsl3 The Initial Gaia Source List (IGSL) (Smart, 2013)
ReadMe+ftp
2013yCat.1324....0S
metaI/324/igsl3

IGSL3 data release (1,222,598,530 sources) (1222598530 rows)

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Full	_r arcsec	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 (...)	e_DEJ2000 arcsec	magBJ mag	e_ mag	magRF mag	e_ mag	magG mag	e_ mag	magGrvs mag	e_ mag	alphaEpoch yr	deltaEpoch yr	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)
1	0.076	146.893601	-42.465950	0.299	0.299	17.020	0.500	14.684	0.500	14.775	0.400	13.130	0.500	1999.2100	1999.2100	0.0	0.0	0.0

I/337/gaia

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