VizieR

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The 5 columns in color are computed by VizieR, and are not part of the original data.

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	Name	RAB1950 "h:m:s"	DEB1950 "d:m:s"	bmag mag	Nfields	Flag1	Flag2	Flag3	_RA.icrs "h:m:s"	_DE.icrs "d:m:s"
1	3.163	23 25 40.65408	+06 45 32.5864	+06.0603	23 23 08.086	+06 29 02.40	16.29	1	0	0	0	23 25 40.654	+06 45 32.59

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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.

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ACTflag

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mag

Epoch
yr

1 3.188 23 25 40.65552 +06 45 32.7024 0900-20402560 351.419398 +06.759084 12.5 11.0 1951.604

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%3cBR%3e%0a%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%203.04&%3cFONT%20COLOR=%27#CD5B45%27>23%2025%2040.6608&%3cFONT%20COLOR=%27#CD5B45%27>%2b06%2045%2032.508&0058401354&351.41942&%2b06.75903&%200.3&14.67&%200.37&%201&3&0100&1983.609%3cBR%3e%0a%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%203.27&%3cFONT%20COLOR=%27#CD5B45%27>23%2025%2040.6488&%3cFONT%20COLOR=%27#CD5B45%27>%2b06%2045%2032.688&0058401354&351.41937&%2b06.75908&%200.3&14.92&%200.40&%201&3&0515&1983.680%3cBR%3e%0a %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eGSC-ACT%20%3cEM%3e%28or%20%3cB%3eGSC1.3%29%0ais%20a%20recalibration%20of%20the%20%3cB%3e<%25E%20I/220%7cGSC1.1>,%20the%20catalogue%20constructed%20%0ato%20support%20the%20operational%20need%20of%20the%20Hubble%20Space%20Telescope,%0awith%20the%20%3cB%3e<%25E%20I/246%7cACT>,%20the%20combination%20of%20the%20Astrographic%20Catalogue%0aand%20the%20%3cB%3e%3cEM%3eTycho%20catalogue%20derived%20from%20the%20%3cEM%3e<%25E%20I/239%7cHipparcos>%0amission;%20see%20http://www.projectpluto.com/gsc_act.htm%20for%20more%20details%0aabout%20this%20recalibration.%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC	RAJ2000 deg	DEJ2000 deg	PosErr arcsec	Pmag mag	e_ mag	n_	Class	Epoch yr
1	2.96	23 25 40.6680	+06 45 32.544	0058401354	351.41945	+06.75904	0.3	14.93	0.40	1	3	1983.680
2	3.16	23 25 40.6488	+06 45 32.364	0058401354	351.41937	+06.75899	0.3	14.70	0.37	1	3	1983.609

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	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 [**ClosingBrace(s)Inserted**]
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%22> 1 3.37723 25 40.64472+06 45 32.8032EO0316-0182997351.419353+06.75911210.04 1 18.25 34.2 0.4511.96 1 28.89 36.9 1.92 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20construction%20of%20the%20%0a%3cB%3eGSC-II%20%0ais%20still%20in%20progress:%20this%0aversion%20has%20no%20proper%20motions,%20and%20the%20magnitude%20limits%20are%2018.5%20in%20F%20%28red%29%0aand%2019.5%20in%20J%20%28blue%29.%20The%20data%20are%20%3cB%3e%3cFONT%20COLOR=%27#0000CD%27>copyrighted,%20check%20%0athe%20%3cB%3edata%20use%20Policy.%0a%3cP%3e%0a

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	3.139	23 25 40.66104	+06 45 32.7636	N000333190	351.419421	+06.759101	1993.639	10.94	0.43	12.49	0.42	3	13.81	0.42

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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	2.895	23 25 40.66608	+06 45 32.2920	0967-0624946	351.419442	+06.758970	79	223	1976.2	0	0	5	20.32	10.86	11.36	10.41	11.63
2	7.291	23 25 40.86288	+06 45 38.7000	0967-0624948	351.420262	+06.760750	999	999	1965.2	0	0	3	18.48	18.80	20.78
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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

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