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	1.071	10 26 42.40536	+36 40 50.6820	1200-06519334	156.676689	+36.680745			18.5	18.2	1954.255
2	5.330	10 26 42.03888	+36 40 53.4324	1200-06519314	156.675162	+36.681509			15.8	14.9	1954.255

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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	4.941	10 26 42.06672	+36 40 53.2200	EO1032-0043454	156.675278	+36.681450	16.64		1	40.72	19.0	0.28	17.01		1	21.37	24.0	0.37
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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	5.117	10 26 42.03048	+36 40 52.9968	N2322110845	156.675127	+36.681388	1989.176	14.83	0.28	15.24	0.27	3	9.81	0.39

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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	2.667	10 26 42.47472	+36 40 52.0428	1266-0184944	156.676978	+36.681123	124	272	1966.2	22	32	3	19.28	18.27		18.03
2	4.184	10 26 42.64080	+36 40 52.2300	1266-0184945	156.677670	+36.681175	999	999	1972.2	0	0	4	20.23	18.87	19.54	20.90
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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	2.664	10 26 42.474672	+36 40 52.03992	1266-0188814	Y.	156.6769778	+36.6811222	B	22.0	3.0	32.0	7.0	18.280	o	17.970	Y	18.030	B
2	4.183	10 26 42.640656	+36 40 52.23000	1266-0188815	..	156.6776694	+36.6811750	B	0.0	0.0	0.0	0.0	19.540	B			20.900	B
3	5.199	10 26 42.037344	+36 40 53.22000	1266-0188810	Y.	156.6751556	+36.6814500	B	22.0	4.0	0.0	4.0	18.350	Y			13.730	B
4	5.963	10 26 41.988672	+36 40 53.70996	1266-0188808	Y.	156.6749528	+36.6815861	B	-14.0	21.0	10.0	4.0	16.180	o	17.460	Y	14.670	B
5	6.140	10 26 42.805344	+36 40 52.75992	1266-0188816	..	156.6783556	+36.6813222	B	0.0	0.0	0.0	0.0	19.090	B			19.540	B
6	8.974	10 26 41.757336	+36 40 55.04988	1266-0188806	..	156.6739889	+36.6819583	B	-28.0	3.0	32.0	25.0	17.020	B			17.370	e
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6	8.974	10 26 41.757336	+36 40 55.04988	1266-0188806	..	156.6739889	+36.6819583	B	-28.0	3.0	32.0	25.0	17.020	B			17.370	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	5.117	10 26 42.03072	+36 40 53.0004	N978000845	156.675128	+36.681389	1989.176	14.83	15.24	16.45	16.75	3	9.81	0.39

%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	2.428	10 26 42.47976	+36 40 51.7152	156.676999	+36.681032	17.2	18.5			19.28		18.27	18.03		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	2.428	10 26 42.47972	+36 40 51.7150	156.676999	+36.681032	0.133	0.133	19.280	0.400	18.030	0.400	18.266	0.400	17.266	0.500	1966.2400	1966.2400	17.2	7.8	18.5	7.8
2	4.354	10 26 42.70082	+36 40 51.2258	156.677920	+36.680896	0.133	0.133	19.540	0.400	20.900	0.400	20.499	0.400	21.470	0.500	1972.2400	1972.2400	62.6	7.4	-83.1	7.4
3	5.114	10 26 42.03163	+36 40 53.0080	156.675132	+36.681391	0.103	0.103	15.241	0.300	14.830	0.300	14.926	0.400	14.529	0.500	1977.3800	1977.3800	14.7	5.4	-10.6	5.4
4	5.555	10 26 41.99862	+36 40 53.2183	156.674994	+36.681450	0.052	0.087	16.180	0.400	14.670	0.400	16.601	0.081	15.810	0.110	2004.1200	2004.1200	-21.8	5.6	-1.3	5.6
5	6.256	10 26 42.79226	+36 40 53.2381	156.678301	+36.681455	0.133	0.133	19.090	0.400	19.540	0.400	19.389	0.400	19.658	0.500	1978.2300	1978.2300	-10.1	7.8	5.6	7.8
6	9.090	10 26 41.75016	+36 40 55.1280	156.673959	+36.681980	0.133	0.133	17.020	0.400	17.370	0.400	17.249	0.400	17.440	0.500	1980.4600	1980.4600	-35.9	7.0	26.4	7.0

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