VizieR

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The 7 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
Post annotation 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	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	USNO-A2.0	RAJ2000 deg	DEJ2000 deg	ACTflag	Mflag	Bmag mag	Rmag mag	Epoch yr
1	0.052	08 55 40.17672	-55 40 17.4108	08 54 16.86152	-55 28 44.4347	273.82298428	-06.75526799	0300-05376378	133.917403	-55.671503			17.4	16.7	1981.152

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.

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Post annotation 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"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	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	0.208	08 55 40.19280	-55 40 17.1912	08 54 16.90015	-55 28 44.0583	273.82296150	-06.75519989	0343-0117454	133.917470	-55.671442	79	69	1983.6	0	0	4		16.38	17.13	16.44	16.10

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
Post annotation 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	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	GSC2.2	RA(ICRS) deg	DE(ICRS) deg	Epoch yr	Rmag mag	e_ mag	Bjmag mag	e_ mag	Class	a pix	e
1	0.326	08 55 40.15512	-55 40 17.1012	08 54 16.83980	-55 28 44.1263	273.82288504	-06.75525185	S113000032392	133.917313	-55.671417	1991.258	16.21	0.19	17.26	0.31	0	2.84	0.02

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
Post annotation 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"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	GSC2.3	RAJ2000 deg	DEJ2000 deg	Epoch yr	Fmag mag	jmag mag	Vmag mag	Nmag mag	Class	a pix	e
1	0.327	08 55 40.15536	-55 40 17.0976	08 54 16.84004	-55 28 44.1227	273.82288464	-06.75525078	S4JK032392	133.917314	-55.671416	1991.258	16.21	17.26		16.34	0	2.84	0.02

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Post annotation

The Guide Star Catalog, Version 2.4.2 (GSC2.4.2) (STScI, 2020)

ReadMe+ftp

2008AJ....136..735L

Guide Star Catalogue, Version 2.4.2 (original column names in green) (3485671481 rows)

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	_RAB1950 "h:m:s"	_DEB1950 "d:m:s"	_Glon deg	_Glat deg	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	0.344	08 55 40.1726317416	-55 40 17.019781392	08 54 16.8571651509	-55 28 44.043940699	273.8228941103441	-06.7552057670829	S4JK032392	133.91738596559	-55.67139438372	2113000032392	2015.500	0	16.679552		17.256500	16.214300		16.335800			17.576000		16.885	16.724	16.604	16.615		15.671	15.684	15.459									2.844	0.025	72.4

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