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.

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	6.537	19 46 42.52008	+65 34 01.5132	1500-07033980	296.677167	+65.567087			17.2	17.1	1953.608

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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
1	6.494	19 46 42.48600	+65 34 01.7724	EO0777-0268596	296.677025	+65.567159	16.78		1	20.93	12.0	0.26	17.70		1	13.75	13.6	0.92
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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.

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	6.575	19 46 42.52320	+65 34 01.4448	N01321323673	296.677180	+65.567068	1991.595	16.29	0.40	16.77	0.39	3	5.48	0.13

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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	3.516	19 46 42.66072	+65 34 06.0816	1555-0198524	296.677753	+65.568356	999	580	1967.2	68	122	3	19.51	19.05			17.86
2	4.354	19 46 42.53208	+65 34 05.7000	1555-0198521	296.677217	+65.568250	223	71	1982.7	-20	70	4		18.11	20.00	19.50	17.73
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%204.354&%3cFONT%20COLOR=%27#CD5B45%27>19%2046%2042.53208&%3cFONT%20COLOR=%27#CD5B45%27>%2b65%2034%2005.7000&1555-0198521&296.677217&%2b65.568250&223&%2071&1982.7&%20%20%20-20&%20%20%20%2070&4&%20&18.11&20.00&19.50&17.73%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663ec246f7623&-out.add=.&-source=I/284/out&USNO-B1.0===1555-0198518&-out.orig=o' class='full'3 5.79419 46 42.30552+65 34 05.37241555-0198518296.676273+65.5681598009991974.0 0 0218.33      18.93 4 5.80919 46 42.63672+65 34 01.85161555-0198522296.677653+65.5671813864621966.2 0 0318.4118.1116.03     5 6.18219 46 42.23280+65 34 06.89161555-0198514296.675970+65.5685814839991974.0 0 0219.63      18.77 6 6.48319 46 42.48672+65 34 01.78321555-0198519296.677028+65.567162105 921976.9 0 0517.0116.3816.0315.5916.45 7 7.60819 46 42.24000+65 34 01.84081555-0198515296.676000+65.5671781732011967.2 -42 10317.9417.12    18.15 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20Naval%20Observatory%20Merged%20Astrometric%20Dataset%20%28NOMAD%29%20contains%0aastrometric%20and%20photometric%20data%20for%20over%201%20billion%20stars%20derived%20from%0athe%20Hipparcos%20%28I/239%29,%20Tycho-2%20%28I/259%29,%20UCAC2%20%28I/289%29,%20and%20USNO-B1.0%0a%28I/284%29%20catalogs%20for%20astrometry%20and%20optical%20photometry,%20supplemented%0aby%202MASS%20%28II/246%29%20near-infrared%20photometry.%3cBR%3e%0a%3cFONT%20SIZE=%27-1%27%3eAn%20efficient%20remote%20query%20program%20%3cB%3efindnomad1%20is%0aavailable%20in%20the%20cdsclient%20%0apackage,%20for%20Unix/Linux%20platforms%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	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	3.517	19 46 42.660672	+65 34 06.08016	1555-0203998	..	296.6777528	+65.5683556	B	68.0	29.0	122.0	15.0	19.510	o			19.050	e
2	4.355	19 46 42.532008	+65 34 05.70000	1555-0203995	..	296.6772167	+65.5682500	B	-20.0	9.0	70.0	2.0	20.000	B			19.500	B
3	5.796	19 46 42.305328	+65 34 05.36988	1555-0203992	..	296.6762722	+65.5681583	B	0.0	0.0	0.0	0.0	18.330	o
4	5.810	19 46 42.636672	+65 34 01.85016	1555-0203996	..	296.6776528	+65.5671806	B	0.0	0.0	0.0	0.0	16.030	B			18.110	e
5	6.182	19 46 42.232656	+65 34 06.89016	1555-0203988	..	296.6759694	+65.5685806	B	0.0	0.0	0.0	0.0	19.630	o
6	6.486	19 46 42.486672	+65 34 01.77996	1555-0203993	..	296.6770278	+65.5671611	B	0.0	0.0	0.0	0.0	16.030	B			15.590	B
7	7.609	19 46 42.240000	+65 34 01.84008	1555-0203989	..	296.6760000	+65.5671778	B	-42.0	4.0	10.0	5.0	17.940	o			17.120	e
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7	7.609	19 46 42.240000	+65 34 01.84008	1555-0203989	..	296.6760000	+65.5671778	B	-42.0	4.0	10.0	5.0	17.940	o			17.120	e

%22>\EndTABLESORT

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.

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	6.572	19 46 42.52320	+65 34 01.4484	N1I6003673	296.677180	+65.567069	1991.595	16.29	16.77	17.56	17.61	3	5.48	0.13

%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	pmRA mas/yr	pmDE mas/yr	Jmag mag	Kmag mag	b1mag mag	b2mag mag	r1mag mag	r2mag mag	imag mag	No	fl
1	3.502	19 46 42.66744	+65 34 05.8476	296.677781	+65.568291	75.4	117.4			19.51		19.05		17.86	3	0
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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	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	3.502	19 46 42.66747	+65 34 05.8478	296.677781	+65.568291	0.133	0.133	19.510	0.400	19.050	0.400	19.158	0.400	18.725	0.500	1967.2200	1967.2200	75.4	6.9	117.4	6.9
2	4.472	19 46 42.51795	+65 34 05.5161	296.677158	+65.568199	0.115	0.115	20.000	0.400	19.500	0.400	19.617	0.400	19.154	0.500	1982.7900	1982.7900	-22.5	6.8	70.1	6.8
3	6.363	19 46 42.54524	+65 34 01.6070	296.677272	+65.567113	0.133	0.133	16.766	0.300	16.292	0.300	16.403	0.400	15.960	0.500	1966.2400	1966.2400	-13.0	7.4	-6.9	7.4
4	6.555	19 46 42.48384	+65 34 01.7001	296.677016	+65.567139	0.103	0.103	16.030	0.400	15.590	0.400	15.693	0.400	15.275	0.500	1976.9500	1976.9500	2.0	5.4	2.6	5.4
5	7.740	19 46 42.24026	+65 34 01.6207	296.676001	+65.567117	0.133	0.133	17.940	0.400	17.120	0.400	17.304	0.400	16.604	0.500	1967.2200	1967.2200	-41.7	6.9	8.2	6.9

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