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	0.301	10 29 52.33272	+20 40 09.6924	1050-06294878	157.468053	+20.669359			18.3	18.6	1955.279

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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	1.614	10 29 52.38336	+20 40 11.3016	EO1380-0212481	157.468264	+20.669806	18.79		1	9.79	9.5	0.51	18.46		1	20.31	21.1	-0.34
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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	0.498	10 29 52.34208	+20 40 10.2108	N20303302969	157.468092	+20.669503	1998.004	17.08	0.41	16.00	0.38	3	7.36	0.27

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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	0.913	10 29 52.31688	+20 40 08.9904	1106-0189677	157.467987	+20.669164	326	537	1976.2	0	0	4	17.79	18.60	17.07	17.94
2	1.895	10 29 52.32816	+20 40 07.8816	1106-0189678	157.468034	+20.668856	999	187	1987.1	18	20	4	17.24		18.12	18.09	17.83
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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	0.915	10 29 52.316664	+20 40 08.99004	1106-0194382	..	157.4679861	+20.6691639	B	0.0	0.0	0.0	0.0	17.070	B			17.940	B
2	1.897	10 29 52.327992	+20 40 07.88016	1106-0194383	..	157.4680333	+20.6688556	B	18.0	48.0	20.0	8.0	18.120	B			18.090	B
3	2.258	10 29 52.384008	+20 40 11.96004	1106-0194385	..	157.4682667	+20.6699889	B	0.0	0.0	0.0	0.0	17.250	B			18.700	B
4	3.929	10 29 52.348008	+20 40 13.67004	1106-0194384	Y.	157.4681167	+20.6704639	B	16.0	3.0	82.0	37.0	18.350	Y			17.950	B
5	5.058	10 29 52.540008	+20 40 05.40984	1106-0194386	Y.	157.4689167	+20.6681694	B	0.0	0.0	0.0	0.0	18.350	Y
6	5.127	10 29 52.191336	+20 40 05.14992	1106-0194380	..	157.4674639	+20.6680972	B	0.0	0.0	0.0	0.0	19.520	B
7	6.814	10 29 52.314672	+20 40 02.94996	1106-0194381	..	157.4679778	+20.6674861	B	0.0	0.0	0.0	0.0	20.460	B			19.170	e
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7	6.814	10 29 52.314672	+20 40 02.94996	1106-0194381	..	157.4679778	+20.6674861	B	0.0	0.0	0.0	0.0	20.460	B			19.170	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	0.501	10 29 52.34208	+20 40 10.2144	N6YK002969	157.468092	+20.669504	1998.004	17.08	16.00	18.90		3	7.36	0.27

%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	0.726	10 29 52.31976	+20 40 09.1956	157.467999	+20.669221	3.2	-0.2			17.79	17.07	18.60	17.94		4	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	1.088	10 29 52.27747	+20 40 09.5601	157.467823	+20.669322	0.091	0.127	16.001	0.300	17.080	0.300	20.202	0.107	19.636	0.131	2005.1900	2005.1900	3.2	5.5	-0.2	5.5
2	2.153	10 29 52.29527	+20 40 07.7521	157.467897	+20.668820	0.133	0.115	18.120	0.400	18.090	0.400	18.083	0.400	17.979	0.500	1987.2000	1987.2000	1.7	6.6	17.7	6.2
3	3.345	10 29 52.37864	+20 40 13.0684	157.468244	+20.670297	0.200	0.201	17.250	0.400	18.700	0.400	20.567	0.121	20.005	0.143	2005.1900	2005.1900	-5.9	6.2	-4.9	6.2
4	4.207	10 29 52.34642	+20 40 13.9478	157.468110	+20.670541	0.133	0.133	19.210	0.400	17.950	0.400	18.187	0.400	17.180	0.500	1983.1900	1983.1900	9.4	6.7	88.2	6.7
5	7.389	10 29 52.19473	+20 40 02.6979	157.467478	+20.667416	0.163	0.163	20.460	0.400	19.170	0.400	19.408	0.400	18.381	0.500	1975.7900	1975.7900	-44.0	7.9	-24.4	7.9

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