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	0.376	09 55 39.43608	+19 34 43.4928	1050-06159403	148.914317	+19.578748			18.5	16.7	1955.221
2	4.893	09 55 39.28152	+19 34 47.8200	1050-06159392	148.913673	+19.579950			18.6	17.2	1955.221

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

Mflag

%22> 1 2.23109 55 39.38880+19 34 45.6204EO1356-0040911148.914120+19.57933917.16   1 4.51 16.9 0.4518.79   1 16.24 15.9 1.64   2 3.10009 55 39.29736+19 34 45.7032EO1509-0023821148.913739+19.57936217.58   1 11.68 15.4 0.5619.29   2 23.47 14.9 1.70   %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	0.318	09 55 39.47472	+19 34 43.3848	N23110206667	148.914478	+19.578718	1989.181	17.14	0.42	18.17	0.42	3	4.10	0.33
2	5.490	09 55 39.25104	+19 34 48.2556	N23110206668	148.913546	+19.580071	1989.181	17.74	0.42	19.26	0.42	0	2.61	0.11

%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	0.837	09 55 39.42000	+19 34 44.2416	1095-0176796	148.914250	+19.578956	96	207	1978.8	0	0	5	19.09	17.31	16.44	16.25	16.81
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.837&%3cFONT%20COLOR=%27#CD5B45%27>09%2055%2039.42000&%3cFONT%20COLOR=%27#CD5B45%27>%2b19%2034%2044.2416&1095-0176796&148.914250&%2b19.578956&%2096&207&1978.8&%20%20%20%20%200&%20%20%20%20%200&5&19.09&17.31&16.44&16.25&16.81%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663cd9941ae7c9&-out.add=.&-source=I/284/out&USNO-B1.0===1095-0176794&-out.orig=o' class='full'2 4.03709 55 39.30408+19 34 47.01001095-0176794148.913767+19.5797251516151984.5 0 0419.18  17.3317.0916.29 3 4.85409 55 39.28944+19 34 47.84161095-0176793148.913706+19.579956 591711970.1 8 -4319.5617.77    16.52 %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	0.836	09 55 39.420000	+19 34 44.24016	1095-0180584	YM	148.9142500	+19.5789556	B	0.0	0.0	0.0	0.0	18.350	Y	17.840	Y	16.250	B	16.498	15.965	15.417
2	4.038	09 55 39.304008	+19 34 47.01000	1095-0180582	..	148.9137667	+19.5797250	B	0.0	0.0	0.0	0.0	17.330	B			17.090	B
3	4.854	09 55 39.289344	+19 34 47.84016	1095-0180581	YM	148.9137056	+19.5799556	B	8.0	1.0	-4.0	4.0	18.350	o			17.770	e	16.557	15.574	15.471

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

%22d:m:s%22&%">\BegDIVclass='sort-down ' </A>stringGSC2.3

RAJ2000
deg

DEJ2000
deg

Epoch
yr

Fmag
mag

jmag
mag

Vmag
mag

Nmag
mag

Class

a
pix

e

1 0.31509 55 39.47472+19 34 43.3884N8Y0006667148.914478+19.5787191989.18117.1418.1717.5817.083 4.10 0.33 2 5.49109 55 39.25128+19 34 48.2592N8Y0006668148.913547+19.5800721989.18117.7419.2617.0217.283 2.61 0.11 3 7.69609 55 39.97296+19 34 46.2468N8Y0012924148.916554+19.5795131993.944  21.73    0 1.34 0.04 %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	0.525	09 55 39.44376	+19 34 44.1012	148.914349	+19.578917	7.5	-7.4	16.498	15.418	19.09	16.44	17.31	16.25	16.81	6	1
2	4.496	09 55 39.29280	+19 34 47.4528	148.913720	+19.579848	-2.9	-6.5	16.558	15.471	19.18	17.33		17.09	16.29	5	1
3	4.941	09 55 39.28728	+19 34 47.9244	148.913697	+19.579979	5.8	-6.0	16.558	15.471	19.56		17.77		16.52	4	0

%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	ID	RAICRS deg	DEICRS deg	pmRAp mas/yr	pmDEp mas/yr	pmRAx mas/yr	pmDEx mas/yr	[****ClosingBrace(s)Inserted****]
">

mas/yr&%">\BegDIVclass='sort-down ' </A>decFmag
magBjmag
mag

Vmag
mag

Nmag
mag

Jmag
mag

e_
mag

Hmag
mag

e_
mag

Kmag
mag

e_
mag

2Mkey

Bmag
mag

Rmag
mag

Fld

dT
yr

fg

fs

M

1 0.46109 55 39.48406+19 34 43.9571XPM 219-0290992148.914517+19.578877 14.06 11.68 14.23 12.0017.14218.16817.57617.08416.498 0.13815.966 0.20015.418 0.183 45999147818.516.7 43043.67801700M 2 5.09209 55 39.28923+19 34 48.1117XPM 219-0290991148.913705+19.580031 1.36 7.82 1.53 8.1517.73819.25917.01817.27716.558 0.13515.575  15.471 0.219 45999147618.617.2 43043.67801700M %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	0.325	09 55 39.44675	+19 34 43.3765	148.914361	+19.578716	0.011	0.014	18.168	0.300	17.142	0.300	17.839	0.081	16.613	0.111	2005.0900	2005.0900	7.5	4.7	-7.4	4.7
2	4.497	09 55 39.29277	+19 34 47.4530	148.913720	+19.579848	0.095	0.115	17.330	0.400	17.090	0.400	17.142	0.400	16.875	0.500	1989.0300	1989.0300	-2.9	6.2	-6.5	6.6
3	5.712	09 55 39.23750	+19 34 48.3958	148.913490	+19.580110	0.003	0.003	19.259	0.300	17.738	0.300	18.284	0.081	17.248	0.111	2005.0900	2005.0900	5.8	4.9	-6.0	4.9

%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"	URAT1	RAICRS deg	DEICRS deg	Epoch yr	f.mag [****ClosingBrace(s)Inserted****]
">

f.mag

%20

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

pmRA
mas/yr

pmDE
mas/yr

Jmag
mag

Hmag
mag

Kmag
mag

Bmag
mag

Vmag
mag

gmag
mag

rmag
mag

imag
mag

1 0.32609 55 39.480555+19 34 43.89783548-160608148.9143778+19.57870582014.03017.679 0.014 -30.1 -39.716.49815.96615.418           2 5.58509 55 39.285485+19 34 48.11681548-160607148.9135092+19.58008002014.02417.720 0.041 -43.6 12.216.55815.57515.471           %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"	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	0.270	09 55 39.449215	+19 34 43.85003	148.9143717	487.00	+19.5788472	887.00	60744+0006667	4	17.0	18.1	-21.3	33.0	6	43.923	17.142	18.168	17.084	17.576	16.498	15.966	15.418
2	5.183	09 55 39.262791	+19 34 47.99779	148.9135950	431.00	+19.5799994	724.00	60744+0006668	0	-8.8	14.3	23.6	24.1	7	43.924	17.738	19.259	17.277	17.018	16.558	15.575	15.471

%0a%0a%0a