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	6.967	08 10 25.84272	+51 50 24.7128	1350-07317188	122.607678	+51.840198			17.3	17.2	1953.124

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cB%3e%3cFONT%20COLOR=%27#CD5B45%27>%20The%20current%20version%20includes%20only%20the%20North%20%28POSS-I%20plates%29%3cP%3e%0a

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	3.714	08 10 26.43888	+51 50 32.5032	EO0679-0298628	122.610162	+51.842362	20.00	L	0				21.58		-1	-0.15	3.3	1.58
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%203.714&%3cFONT%20COLOR=%27#CD5B45%27>08%2010%2026.43888&%3cFONT%20COLOR=%27#CD5B45%27>%2b51%2050%2032.5032&EO0679-0298628&122.610162&%2b51.842362&20.00&L&%200&%20&%20&%20&21.58&%20&-1&%20%20-0.15&%20%20%203.3&%20%201.58&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66430e5234676d&-out.add=.&-source=I/267/out&APM-ID===EO0679-0298753&-out.orig=o' class='full'2 6.77208 10 25.86480+51 50 24.7632EO0679-0298753122.607770+51.84021216.98   2 32.69 19.7 0.6118.02   1 25.91 14.8 1.04   %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	6.493	08 10 25.87488	+51 50 25.1124	N23023231601	122.607812	+51.840309	1990.069	15.97	0.43	17.17	0.42	3	10.19	0.61

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eUSNO-B%20Catalog%20presents%20positions,%20proper%20motions,%20%0amagnitudes%20un%20blue,%20red%20and%20infrared,%20as%20well%20as%20star/galaxy%20estimators%0afor%201,045,175,762%20objects%20derived%20from%203,648,832,040%20separate%20observations.%0aThe%20data%20were%20taken%20from%20scans%20of%207,435%20Schmidt%20plates%0ataken%20from%20various%20sky%20surveys%20during%20the%20last%2050%20years.%3cBR%3e%0aUSNO-B1.0%20catalog%20was%20created%20by%20Dave%20Monet%20and%20collaborators%0aat%20http://www.nofs.navy.mil/data/fchpix/%20%3cBR%3e%0a%3cB%3e%3cFONT%20COLOR=%27#EE0000%27>%20Note%20that%20the%20star/galaxy%20estimators%20may%20be%20mixed%20up%0a%20in%20dense%20regions.%0a%3cP%3e%0a

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	2.330	08 10 26.20344	+51 50 29.1300	1418-0206489	122.609181	+51.841425	477	999	1980.4	160	144	3		19.48	20.14	17.50
2	3.470	08 10 26.08152	+51 50 28.3020	1418-0206488	122.608673	+51.841195	194	50	1975.6	0	0	2		19.22	19.42
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%203.470&%3cFONT%20COLOR=%27#CD5B45%27>08%2010%2026.08152&%3cFONT%20COLOR=%27#CD5B45%27>%2b51%2050%2028.3020&1418-0206488&122.608673&%2b51.841195&194&%2050&1975.6&%20%20%20%20%200&%20%20%20%20%200&2&%20&19.22&19.42&%20&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66430e5234676d&-out.add=.&-source=I/284/out&USNO-B1.0===1418-0206490&-out.orig=o' class='full'3 4.10108 10 26.26152+51 50 32.49241418-0206490122.609423+51.8423595342651971.5 0 02  19.03  18.63   4 4.56108 10 25.98144+51 50 27.46321418-0206487122.608256+51.8409621603101975.6 0 02  18.4919.39     5 4.86508 10 26.32488+51 50 33.51121418-0206491122.609687+51.8426426179991971.5 0 02  19.82  19.63   6 5.88008 10 25.86216+51 50 26.63161418-0206483122.607759+51.8407314403071973.2 0 0420.0718.02  17.5917.94 7 5.88108 10 25.95288+51 50 25.16281418-0206486122.608137+51.8403238341991993.3 -320 -6783    19.3019.3517.97 8 6.41608 10 25.87344+51 50 25.27081418-0206485122.607806+51.8403532771751983.3 0 0417.84  16.1716.5118.31 9 7.55908 10 25.78080+51 50 24.50041418-0206482122.607420+51.840139344 161980.0 -10 63  17.29  16.1116.98 10 8.17608 10 25.87344+51 50 22.62121418-0206484122.607806+51.8396173769991971.5 0 0220.20    17.50   %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	2.331	08 10 26.203344	+51 50 29.13000	1418-0210160	..	122.6091806	+51.8414250	B	160.0	17.0	144.0	39.0	20.140	B			17.500	B
2	3.472	08 10 26.081328	+51 50 28.29984	1418-0210159	..	122.6086722	+51.8411944	B	0.0	0.0	0.0	0.0	19.420	B			19.220	e
3	4.100	08 10 26.261328	+51 50 32.48988	1418-0210161	..	122.6094222	+51.8423583	B	0.0	0.0	0.0	0.0					18.630	B
4	4.563	08 10 25.981344	+51 50 27.45996	1418-0210158	..	122.6082556	+51.8409611	B	0.0	0.0	0.0	0.0	19.390	B			18.490	e
5	4.865	08 10 26.324664	+51 50 33.51012	1418-0210162	..	122.6096861	+51.8426417	B	0.0	0.0	0.0	0.0					19.630	B
6	5.882	08 10 25.861992	+51 50 26.63016	1418-0210154	..	122.6077583	+51.8407306	B	0.0	0.0	0.0	0.0	20.070	o			17.590	B
7	5.884	08 10 25.952664	+51 50 25.15992	1418-0210157	..	122.6081361	+51.8403222	B	-320.0	107.0	-678.0	25.1	19.300	B			19.350	B
[****ClosingBrace(s)Inserted****]
7	5.884	08 10 25.952664	+51 50 25.15992	1418-0210157	..	122.6081361	+51.8403222	B	-320.0	107.0	-678.0	25.1	19.300	B			19.350	B

%22>\Ahref='VizieR-5?-ref=VIZ66430e5234676d&-out.add=.&-source=I/297/out&NOMAD1===1418-0210155' class='full'8 6.41708 10 25.873344+51 50 25.270081418-0210155..122.6078056+51.8403528B 0.0 0.0 0.0 0.016.170B    16.510B         9 7.56008 10 25.780656+51 50 24.500041418-0210153Y.122.6074194+51.8401389B -10.0 12.0 6.0 0.0    17.510Y16.110B         10 8.17708 10 25.873344+51 50 22.620121418-0210156..122.6078056+51.8396167B 0.0 0.0 0.0 0.020.200o    17.500B         %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20This%20version%20of%20the%20%0a%3cB%3eGSC-II%0ahas%20no%20proper%20motions,%20but%20the%20limits%20on%20brightness%20which%20existed%20on%0a%20%28F<18.5,%20B_j<19.5%29%20were%20removed.%0a%25The%20data%20are%20%3cB%3e%3cFONT%20COLOR=%27#0000CD%27>copyrighted,%20check%0a%25the%20%3cB%3edata%20use%20Policy.%0a%3cP%3e%0a

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	6.491	08 10 25.87488	+51 50 25.1160	N8U3001601	122.607812	+51.840310	1990.069	15.97	17.17	17.85	18.99	3	10.19	0.61

%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	2.573	08 10 26.18352	+51 50 29.4396	122.609098	+51.841511	151.3	150.3				20.14	19.48	17.50		3	0
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%202.573&%3cFONT%20COLOR=%27#CD5B45%27>08%2010%2026.18352&%3cFONT%20COLOR=%27#CD5B45%27>%2b51%2050%2029.4396&122.609098&%2b51.841511&%20%20%20151.3&%20%20%20150.3&%20&%20&%20&20.14&19.48&17.50&%20&%203&%200%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66430e5234676d&-out.add=.&-source=I/317/sample&PPMXL===%20987278929830726703' class='full'2 3.46808 10 26.08560+51 50 28.0968122.608690+51.841138 -0.9 -3.5      19.4219.22     2 0 3 3.77808 10 26.28072+51 50 32.2188122.609503+51.842283 9.4 -9.4        19.0318.63   2 0 4 4.36008 10 26.34624+51 50 33.0396122.609776+51.842511 11.5 -32.0        19.8219.63   2 0 5 4.65908 10 25.96680+51 50 27.5820122.608195+51.840995 -8.6 4.5      19.3918.49     2 0 6 6.21608 10 25.83312+51 50 26.4012122.607638+51.840667 -5.6 -10.8    20.07  18.0217.5917.94 4 0 7 6.39808 10 25.87584+51 50 25.2708122.607816+51.840353 4.0 2.7    17.8416.17  16.5118.31 4 0 8 7.68408 10 25.82664+51 50 23.7480122.607611+51.839930 -14.9 25.7    20.20    17.50   2 0 9 7.76908 10 25.76664+51 50 24.3204122.607361+51.840089 -18.1 4.1        17.2916.1116.98 3 0 10 9.91308 10 25.67472+51 50 21.9840122.606978+51.839440 6.1 3.8      17.8018.7118.87   3 0 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a

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	2.573	08 10 26.18357	+51 50 29.4401	122.609098	+51.841511	0.133	0.133	20.140	0.400	17.500	0.400	17.458	0.400	15.672	0.500	1980.4700	1980.4700	151.3	6.8	150.3	6.8
2	3.468	08 10 26.08561	+51 50 28.0972	122.608690	+51.841138	0.163	0.163	19.420	0.400	19.220	0.400	19.261	0.400	19.025	0.500	1975.6700	1975.6700	-0.9	7.2	-3.5	7.2
3	4.658	08 10 25.96682	+51 50 27.5818	122.608195	+51.840995	0.163	0.163	19.390	0.400	18.490	0.400	18.687	0.400	17.930	0.500	1975.6700	1975.6700	-8.6	7.2	4.5	7.2
4	6.216	08 10 25.83315	+51 50 26.4008	122.607638	+51.840667	0.115	0.115	20.070	0.400	17.590	0.400	17.625	0.400	15.910	0.500	1973.2500	1973.2500	-5.6	5.7	-10.8	5.7
5	6.397	08 10 25.87584	+51 50 25.2713	122.607816	+51.840353	0.115	0.115	17.165	0.300	15.969	0.300	16.201	0.400	15.237	0.500	1983.3200	1983.3200	4.0	6.5	2.7	6.5
6	7.126	08 10 25.82743	+51 50 24.6383	122.607614	+51.840177	0.129	0.187	18.309	0.200	16.110	0.400	17.450	0.082	16.596	0.112	2003.8100	2003.8100	-18.1	6.9	4.1	6.9
7	7.684	08 10 25.82668	+51 50 23.7482	122.607611	+51.839930	0.163	0.163	20.200	0.400	17.500	0.400	17.426	0.400	15.614	0.500	1971.5900	1971.5900	-14.9	8.8	25.7	8.8
8	9.913	08 10 25.67476	+51 50 21.9840	122.606978	+51.839440	0.133	0.133	17.800	0.400	18.870	0.400	18.539	0.400	19.290	0.500	1980.4200	1980.4200	6.1	6.8	3.8	6.8

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a

>	\BegDIVclass='sort-down ' </A>
dec Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAICRS deg	e_ mas	DEICRS deg	e_ mas	ID	Type	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Nobs	Dt yr	Rmag mag	Bmag mag	Nmag mag	Vmag mag	Jmag mag	Hmag mag	Kmag mag
1	7.403	08 10 25.786886	+51 50 24.69513	122.6074454	133.00	+51.8401931	184.00	60603+0001601	4	1.8	4.8	-0.6	6.6	6	45.101	15.969	17.165	18.994	17.850

%0a%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RA_ICRS deg	DE_ICRS deg	rmag mag	pmRA mas/yr	e_ (...)	pmxRA mas/yr	e_ (...)	Chi2RA	pmGRA mas/yr	pmDE mas/yr	e_ (...)	pmxDE mas/yr	e_ (...)	Chi2DE	pmGDE mas/yr	Nobs	Flag	PS1	Gaia	DR9+DR12	Sloan	2M
1	7.041	08 10 25.8056607435	+51 50 24.654997453	122.60758118312	+51.84024830572	20.012547	12.811	13.244	13.393	13.287	1.63032e-01		23.890	12.014	25.191	12.080	8.58075e-02		6	0	PS1	Gaia	DR9+DR12	Sloan	2M

%0a%0a