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	2.032	00 31 53.49408	+08 41 19.8024	0975-00112126	007.972892	+08.688834			18.5	19.1	1953.932
2	20.674	00 31 54.11472	+08 40 59.6100	0975-00112171	007.975478	+08.683225			19.2	19.0	1953.932
3	22.544	00 31 52.78200	+08 41 38.0400	0975-00112070	007.969925	+08.693900			20.0	19.6	1953.932

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

b-r

%22>%5cFONT SIZE=-1magMflag

1 1.83700 31 53.46144+08 41 19.6800EO0915-0034123007.972756+08.68880019.08  -1 -1.76 4.6 0.1319.15  -1 0.48 8.3 0.07   220.59700 31 54.09336+08 40 59.5308EO0915-0034259007.975389+08.68320318.94  -1 -0.83 5.5 0.2320.10  -1 -0.75 6.5 1.16   322.84200 31 52.75752+08 41 38.1912EO0915-0033974007.969823+08.69394219.78  -1 -1.67 3.2 0.1322.04  -1 -1.47 3.2 2.26   %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	1.214	00 31 53.48616	+08 41 18.9816	N3203322698	007.972859	+08.688606	1992.660			19.44	0.43	0	2.77	0.07

%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	0.902	00 31 53.46408	+08 41 18.7404	0986-0004339	007.972767	+08.688539	165	174	1973.1	-10	-18	4	19.71	19.34	19.99	19.64
2	20.853	00 31 54.10608	+08 40 59.3400	0986-0004341	007.975442	+08.683150	81	71	1977.0	0	0	5	20.29	19.23	20.54	19.66	18.68
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">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>20.853&%3cFONT%20COLOR=%27#CD5B45%27>00%2031%2054.10608&%3cFONT%20COLOR=%27#CD5B45%27>%2b08%2040%2059.3400&0986-0004341&007.975442&%2b08.683150&%2081&%2071&1977.0&%20%20%20%20%200&%20%20%20%20%200&5&20.29&19.23&20.54&19.66&18.68%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ664047a6292072&-out.add=.&-source=I/284/out&USNO-B1.0===0986-0004336&-out.orig=o' class='full'322.42300 31 52.77600+08 41 37.86000986-0004336007.969900+08.693850 43 661973.1 0 0420.2219.6021.0519.62   429.53800 31 52.23816+08 41 41.20080986-0004334007.967659+08.6947784255151991.7 0 02    19.9719.75   %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	0.901	00 31 53.464008	+08 41 18.74004	0986-0004408	Y.	007.9727667	+08.6885389	B	-10.0	5.0	-18.0	5.0	18.300	Y			19.640	B
2	20.853	00 31 54.106008	+08 40 59.34000	0986-0004410	Y.	007.9754417	+08.6831500	B	0.0	0.0	0.0	0.0	20.540	B	17.970	Y	19.660	B
3	22.423	00 31 52.776000	+08 41 37.86000	0986-0004405	..	007.9699000	+08.6938500	B	0.0	0.0	0.0	0.0	21.050	B			19.620	B
4	29.539	00 31 52.237992	+08 41 41.20008	0986-0004403	..	007.9676583	+08.6947778	B	0.0	0.0	0.0	0.0	19.970	B			19.750	B

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

%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_RAJ2000

%20

%22>%5cFONT SIZE=-1"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 1.33700 31 53.46168+08 41 19.1796NB96000698007.972757+08.6886611991.77919.3919.4419.09  0 2.03 0.33 220.84200 31 54.11136+08 40 59.3940NB96000686007.975464+08.6831651991.77919.5820.33  18.910 1.86 0.24 323.36100 31 52.75008+08 41 38.7168NB96000713007.969792+08.6940881991.77920.3921.45    3 1.44 0.39 %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	0.859	00 31 53.47224	+08 41 18.6756	007.972801	+08.688521	-10.9	-25.1			19.71	19.99	19.34	19.64		4	0
2	20.935	00 31 54.10728	+08 40 59.2572	007.975447	+08.683127	-4.3	-7.4			20.29	20.54	19.23	19.66	18.68	5	0
3	22.306	00 31 52.78584	+08 41 37.8024	007.969941	+08.693834	-1.0	-6.7			20.22	21.05	19.60	19.62		4	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	[****ClosingBrace(s)Inserted****]
">

mag&%">\BegDIVclass='sort-down ' </A>decmagRF
mage_
mag

magG
mag

e_
mag

magGrvs
mag

e_
mag

alphaEpoch
yr

deltaEpoch
yr

pmRA
mas/yr

e_
(...)

pmDE
mas/yr

e_
(...)

1 0.94400 31 53.47464+08 41 18.7538007.972811+08.688543 0.008 0.00819.443 0.30019.391 0.30019.107 0.08318.804 0.1122005.73002005.7300 -10.9 6.0 -25.1 6.0 218.39000 31 53.18470+08 40 59.9050007.971603+08.683307 0.069 0.05722.381 0.22121.247 0.20920.886 0.14319.676 0.1622005.73002005.7300 0.0 0.0 0.0   321.21700 31 54.11980+08 40 59.0355007.975499+08.683065 0.010 0.01020.330 0.30019.576 0.30019.410 0.08418.691 0.1132005.73002005.7300 -4.3 5.4 -7.4 5.4 422.44600 31 52.76796+08 41 37.8254007.969867+08.693840 0.020 0.01821.050 0.40019.620 0.40020.319 0.09519.551 0.1212005.73002005.7300 -1.0 6.0 -6.7 6.0 523.37800 31 52.75057+08 41 38.7395007.969794+08.694094 0.400 0.40021.449 0.30020.387 0.30020.605 0.40019.734 0.5001991.78001991.7800 1.4 13.1 3.2 13.0 %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"	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	0.939	00 31 53.474722	+08 41 18.74801	007.9728113	58.00	+08.6885411	63.00	63738+0000698	0	-4.2	2.2	-17.3	2.4	7	39.849	19.391	19.443		19.088
2	21.100	00 31 54.117937	+08 40 59.15308	007.9754914	60.00	+08.6830981	52.00	63738+0000686	4	2.0	2.3	-2.5	2.0	7	40.726	19.576	20.330	18.914
3	22.870	00 31 52.761784	+08 41 38.25497	007.9698408	58.00	+08.6939597	259.00	63738+0000713	3	-4.2	2.4	9.2	10.9	4	39.849	20.387	21.449

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RA_ICRS deg	e_ mas	DE_ICRS deg	e_ mas	[****ClosingBrace(s)Inserted****]
">

mas&%">\BegDIVclass='sort-down ' </A>decSource

Plx
mas

pmRA
mas/yr

pmDE
mas/yr

RADEcor

Dup

<FG>
e-/s

e_
e-/s

<Gmag>
mag

Var

1 0.63400 31 53.467878285+08 41 18.45944241007.972782826212.593+08.6884609562 5.1982749846901389046656       0.9580 3.3157e+02 3.2004e+0019.223NOT_AVAILABLE 221.25800 31 54.121908407+08 40 59.00561448007.975507951711.128+08.6830571151 4.8992749846832669569024       0.9940 2.8018e+02 1.8460e+0019.406NOT_AVAILABLE %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	ipix	comp	pmRA mas/yr	pmDE mas/yr	Jmag mag	Hmag mag	Kmag mag	B1mag mag	B2mag mag	R1mag mag	R2mag mag	Imag mag	GaiaId	Gmag mag	Clone	Nosc
1	0.987	00 31 53.476928448	+08 41 18.78825588	007.9728205352	+08.6885522933	2031333735340682158		-8.960	-21.925				19.71	19.99	19.34	19.64		2749846901389046656	19.223
2	21.110	00 31 54.120272856	+08 40 59.16020916	007.9755011369	+08.6831000581	2031332267848922271		1.573	-10.302				20.29	20.54	19.23	19.66	18.68	2749846832669569024	19.406

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