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	5.270	00 15 54.44688	+18 22 30.8532	1050-00084533	003.976862	+18.375237			17.0	17.4	1954.674
2	6.441	00 15 54.36936	+18 22 31.7928	1050-00084530	003.976539	+18.375498			17.0	16.9	1954.674

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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	6.510	00 15 54.36744	+18 22 32.0520	EO1195-0164659	003.976531	+18.375570	16.90		1	22.79	17.4	0.60	16.66		1	43.69	23.3	-0.24
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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	6.578	00 15 54.36120	+18 22 31.9404	N32020235513	003.976505	+18.375539	1990.634	16.49	0.42	16.44	0.41	3	8.51	0.64

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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	3.150	00 15 54.61080	+18 22 29.7228	1083-0004440	003.977545	+18.374923	661	590	1979.0	0	0	3		19.16	18.97		18.15
2	4.593	00 15 54.53016	+18 22 32.9628	1083-0004439	003.977209	+18.375823	999	999	1978.6	174	306	3	20.45		10.90	16.38
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%204.593&%3cFONT%20COLOR=%27#CD5B45%27>00%2015%2054.53016&%3cFONT%20COLOR=%27#CD5B45%27>%2b18%2022%2032.9628&1083-0004439&003.977209&%2b18.375823&999&999&1978.6&%20%20%20174&%20%20%20306&3&20.45&%20&10.90&16.38&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6642e9e43b64c6&-out.add=.&-source=I/284/out&USNO-B1.0===1083-0004438&-out.orig=o' class='full'3 5.50100 15 54.43416+18 22 31.60201083-0004438003.976809+18.3754451231801976.1 -2 16517.4317.3715.9516.3517.83 4 6.40900 15 54.37080+18 22 31.71001083-0004437003.976545+18.3754751392111976.6 0 0517.4016.8015.8315.8616.40 5 6.63300 15 54.35880+18 22 29.66161083-0004436003.976495+18.3749063139991990.6 0 02    10.9917.15   6 8.84100 15 54.22608+18 22 33.58201083-0004434003.975942+18.3759951281411979.6 2 -183  18.60  17.6017.49 %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	3.153	00 15 54.610656	+18 22 29.71992	1083-0004458	Y.	003.9775444	+18.3749222	B	0.0	0.0	0.0	0.0	18.350	Y			19.160	e
2	4.593	00 15 54.529992	+18 22 32.95992	1083-0004457	..	003.9772083	+18.3758222	B	174.0	51.0	306.0	57.0	10.900	B			16.380	B
3	5.503	00 15 54.433992	+18 22 31.59984	1083-0004456	..	003.9768083	+18.3754444	B	-2.0	4.0	16.0	6.0	15.950	B			16.350	B
4	6.411	00 15 54.370656	+18 22 31.71000	1083-0004455	..	003.9765444	+18.3754750	B	0.0	0.0	0.0	0.0	15.830	B			15.860	B
5	6.635	00 15 54.358656	+18 22 29.66016	1083-0004454	..	003.9764944	+18.3749056	B	0.0	0.0	0.0	0.0	10.990	B			17.150	B
6	8.842	00 15 54.226008	+18 22 33.57984	1083-0004452	Y.	003.9759417	+18.3759944	B	2.0	4.0	-18.0	5.0	18.140	Y	17.810	Y	17.600	B
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6	8.842	00 15 54.226008	+18 22 33.57984	1083-0004452	Y.	003.9759417	+18.3759944	B	2.0	4.0	-18.0	5.0	18.140	Y	17.810	Y	17.600	B

%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	6.575	00 15 54.36144	+18 22 31.9440	NB63005513	003.976506	+18.375540	1990.634	16.49	16.44	17.40	17.28	3	8.51	0.64

%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	3.397	00 15 54.58920	+18 22 29.8524	003.977455	+18.374959	-9.4	2.0				18.97	19.16		18.15	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	3.398	00 15 54.58918	+18 22 29.8519	003.977455	+18.374959	0.133	0.133	18.970	0.400	19.160	0.400	19.088	0.400	19.153	0.500	1979.0700	1979.0700	-9.4	7.7	2.0	7.7
2	4.870	00 15 54.47771	+18 22 30.2425	003.976990	+18.375067	0.065	0.059	15.950	0.400	16.350	0.400	17.260	0.082	16.530	0.111	2009.0400	2009.0400	1.0	5.9	6.9	5.9
3	5.159	00 15 54.50117	+18 22 33.3907	003.977088	+18.375942	0.133	0.133	10.900	0.400	16.380	0.400	18.678	0.400	21.307	0.500	1978.6800	1978.6800	163.9	7.8	312.2	7.8
4	6.123	00 15 54.38908	+18 22 31.4720	003.976621	+18.375409	0.103	0.103	16.440	0.300	16.490	0.300	16.460	0.400	16.417	0.500	1976.6300	1976.6300	7.9	5.7	-13.0	5.7

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