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	1.338	1050-00123677	006.043225	+16.420878			15.2	13.2	1953.910

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	0.80	0118000733	006.04316	+16.42062	0.2	13.92	0.40	1	0	021J	1983.675

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	0.62	0118000733	006.04326	+16.42067	0.2	13.92	0.40	1	0	1983.675

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	1.148	EO0903-0252013	006.043209	+16.420812	13.32		-1	-0.09	15.8	0.04	15.61		-1	-0.67	13.9	2.30

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	0.194	N320221046	006.043354	+16.420585	1988.790	13.12	0.42	15.27	0.42	0	4.77	0.02

I/272/m2000

M2000: Bordeaux Carte du Ciel zone +11<Dec<+18 (Rapaport+, 2001)

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 deg	e_ 10-5deg	DEJ2000 deg	e_ 10-5deg	mag mag	e_ mag	emag mag	Nobs	N1	Ndet	flag
1	0.80	006.04314	34	+16.42054	34	13.688	0.067	0.051	189	298	298	0
2	0.82	006.04316	63	+16.42043	81	13.653	0.181	0.086	44	47	47	1

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	zsp	e_	f_	zph	e_	<zph>	Q	SDSS16	Sp-ID	MJD d
1	0.302	1237679454927650852	006.043409	+16.420458	3	6	0	0.000	0.000	17.549	14.885	13.548	15.597	12.625	0.011	0.003	0.003	0.013	0.003							3	SDSS J002410.41+162513.6		54848.1363
2	0.302	1237679454927650853	006.043409	+16.420458	1	6	1	0.000	0.000	17.567	14.885	13.548	15.609	12.625	0.011	0.003	0.003	0.013	0.003							3	SDSS J002410.41+162513.6		54848.1363