The 3 columns in color are computed by VizieR, and are not part of the original data.

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	0.517	18 00 09.83616	+18 12 55.9008	1050-09511778	270.040984	+18.215528			18.7	17.7	1952.541
2	15.943	18 00 08.76336	+18 12 53.3628	1050-09511214	270.036514	+18.214823			15.9	13.5	1952.541
3	27.497	18 00 08.04072	+18 12 47.2212	1050-09510859	270.033503	+18.213117			18.6	18.2	1952.541
4	29.915	18 00 09.29616	+18 13 25.0320	1050-09511499	270.038734	+18.223620			19.3	18.9	1952.541

%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 [****ClosingBrace(s)Inserted****]
">

bStel

%22>bDiam
arcsecb-r
magMflag

1 0.30818 00 09.84888+18 12 56.0124EO0529-0224721270.041037+18.21555920.00L 0      20.40   2 3.65 7.2 0.40   215.76118 00 08.78016+18 12 53.0820EO0529-0224787270.036584+18.21474515.51   2 3.93 26.4 0.4617.84  -1 0.36 10.8 2.33   327.23118 00 08.05872+18 12 47.2932EO0529-0224926270.033578+18.21313720.00L 0      20.61  -1 -0.33 6.3 0.61   %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	0.645	18 00 09.84048	+18 12 55.6812	N020201029376	270.041002	+18.215467	1992.566	18.21	0.38	18.92	0.42	3	2.61	0.05
2	16.119	18 00 08.75280	+18 12 53.2080	N020201029377	270.036470	+18.214780	1992.566	13.51	0.37	15.42	0.42	0	4.74	0.05
3	27.556	18 00 08.04312	+18 12 46.9476	N020201029370	270.033513	+18.213041	1992.566	17.99	0.38	18.73	0.42	3	2.70	0.07

%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	ID	RAJ2000 "h:m:s"	DEJ2000 "d:m:s"	Vmag mag	o_RAs	o_DEs
1	16.258	18 00 08.745600	+18 12 53.00900	9CP12537	18 00 08.7456	+18 12 53.009	14.459	4	4

%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	[****ClosingBrace(s)Inserted****]
">

%22>arcsec ">\BegDIVclass='sort-down ' </A>string _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 0.65218 00 09.83088+18 12 55.78201082-0322897270.040962+18.215495 84 481976.9 0 0519.6617.7719.3017.1917.44 216.15118 00 08.75016+18 12 53.23321082-0322881270.036459+18.214787 49 401976.9 0 0516.6014.5116.0613.5213.06 316.62518 00 11.00136+18 12 52.52041082-0322909270.045839+18.214589 43 821983.0 0 04  18.8420.5517.5617.89 418.39718 00 08.82336+18 13 07.12201082-0322882270.036764+18.2186451092341991.5 0 02    20.6518.52   521.32118 00 09.92880+18 13 17.53321082-0322898270.041370+18.2215372402001983.0 -12 24420.78  20.7218.3318.31 627.58218 00 08.03736+18 12 47.10241082-0322878270.033489+18.213084 86 271976.9 0 0519.7018.3219.0916.9317.72 729.29518 00 09.28488+18 13 24.34081082-0322888270.038687+18.2234282011441976.9 0 -12520.4619.0020.1318.0017.77 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20More%20recent%20versions%20available:%20UCAC3%20%28I/315%29%20and%20UCAC4%20%28I/322%29;%20see%20also%20the%20UCAC%20home%20page%20at%20http://ad.usno.navy.mil/ucac/%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	2UCAC	RAJ2000 deg	e_ mas	DEJ2000 deg	e_ mas	UCmag mag	No	Nc	pmRA mas/yr	pmDE mas/yr	2Mkey	Jmag mag	Kmag mag
1	16.284	18 00 08.743632	+18 12 53.01720	38280467	270.0364318	25	+18.2147270	21	13.76	6	2	10.3	15.3	1043103948	11.775	10.870

%0a%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 [****ClosingBrace(s)Inserted****]
">

Jmag

%20

%22>%5cFONT SIZE=-1magHmag
mag

Kmag
mag

R

1 0.65618 00 09.830664+18 12 55.779841082-0327135YM270.0409611+18.2154944B 0.0 0.0 0.0 0.015.990Y16.300Y17.190B16.62916.25115.816   216.28418 00 08.743608+18 12 53.016841082-0327118YM270.0364317+18.2147269C 10.2 5.2 15.3 5.218.350Y    13.520B11.77511.07310.870   316.62518 00 11.001336+18 12 52.520041082-0327147..270.0458389+18.2145889B 0.0 0.0 0.0 0.020.550B    17.560B         418.39618 00 08.823336+18 13 07.119841082-0327120..270.0367639+18.2186444B 0.0 0.0 0.0 0.020.650B    18.520B         521.31818 00 09.928656+18 13 17.529961082-0327136..270.0413694+18.2215361B -12.0 9.0 24.0 8.020.720B    18.330B         627.58318 00 08.037336+18 12 47.099881082-0327116YM270.0334889+18.2130833B 0.0 0.0 0.0 0.018.280Y17.970Y16.930B16.49816.11715.388   729.29518 00 09.284664+18 13 24.340081082-0327126..270.0386861+18.2234278B 0.0 6.0 -12.0 4.020.130B    18.000B         %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	PM2000	RAJ2000 "h:m:s"	DEJ2000 "d:m:s"	pmRA mas/yr	pmDE mas/yr	Vmag mag	EpRA yr	EpDE yr	2MASS	TYC1	TYC2	TYC3
1	16.234	18 00 08.746720	+18 12 52.99190	1352516	18 00 08.7473	+18 12 53.008	-3.8	-7.0	14.341	1997.70	1997.28	18000874+1812531

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20Zone%20-30/%2b50deg%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	CMC14	f_	RAICRS deg	DEICRS deg	r'mag mag	Nt	Jmag mag	Hmag mag	Ksmag mag
1	16.247	18 00 08.74584	+18 12 53.0496	180008.7+181253		270.036441	+18.214736	13.883	3	11.775	11.073	10.870

%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