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	3.019	20 20 42.05136	+66 02 42.8532	1500-07352320	305.175214	+66.045237			15.3	15.8	1953.608
2	21.956	20 20 38.35272	+66 02 47.9508	1500-07351671	305.159803	+66.046653			18.9	18.2	1953.608

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

Mflag

%22> 1 3.21020 20 42.07488+66 02 42.9828EO0777-0222810305.175312+66.04527314.96  -1 0.49 9.9 0.0315.38  -1 -1.81 13.5 0.42   2 3.23720 20 42.14016+66 02 42.6408EO0546-0240640305.175584+66.04517820.00L 0      20.53  -1 2.08 4.4 0.53   321.92120 20 38.35008+66 02 47.8032EO0546-0240431305.159792+66.04661218.31   1 3.00 6.5 0.1719.41  -1 -0.68 5.8 1.10   422.11520 20 38.33088+66 02 48.0516EO0777-0222760305.159712+66.04668117.34  -1 -0.36 6.6 0.0219.03  -1 1.16 6.9 1.70   526.80820 20 40.97352+66 03 06.8832EO0546-0240004305.170723+66.05191219.05  -1 -0.25 5.0 0.1721.07L 0     2.02   626.92220 20 41.02536+66 03 07.0524EO0777-0222285305.170939+66.05195918.06  -1 -0.21 5.9 0.1120.29L 0     2.23   %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	22.030	20 20 38.31696	+66 02 47.5548	N013313324666	305.159654	+66.046543	1991.666	18.18	0.40	19.12	0.45	0	2.31	0.08

%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	1.780	20 20 41.86680	+66 02 42.1008	1560-0194749	305.174445	+66.045028	295	147	1965.9	-16	-20	3	19.51	14.72		18.98
2	22.423	20 20 38.26608	+66 02 47.8608	1560-0194735	305.159442	+66.046628	77	84	1976.5	0	0	5	18.90	18.09	19.69	18.34	17.86
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">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>22.423&%3cFONT%20COLOR=%27#CD5B45%27>20%2020%2038.26608&%3cFONT%20COLOR=%27#CD5B45%27>%2b66%2002%2047.8608&1560-0194735&305.159442&%2b66.046628&%2077&%2084&1976.5&%20%20%20%20%200&%20%20%20%20%200&5&18.90&18.09&19.69&18.34&17.86%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6640f8c828f01e&-out.add=.&-source=I/284/out&USNO-B1.0===1560-0194744&-out.orig=o' class='full'326.97620 20 40.95288+66 03 07.03081560-0194744305.170637+66.051953 341131982.5 0 04  18.6820.5318.6217.81 %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	1.779	20 20 41.866656	+66 02 42.10008	1560-0199266	..	305.1744444	+66.0450278	B	-16.0	7.0	-20.0	3.0	19.510	o			18.980	B
2	22.423	20 20 38.266008	+66 02 47.86008	1560-0199252	..	305.1594417	+66.0466278	B	0.0	0.0	0.0	0.0	19.690	B			18.340	B
3	26.975	20 20 40.952664	+66 03 07.03008	1560-0199261	..	305.1706361	+66.0519528	B	0.0	0.0	0.0	0.0	20.530	B			18.620	B

%0a%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 [****ClosingBrace(s)Inserted****]
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GSC2.3

%20

%22>RAJ2000
deg

DEJ2000
deg

Epoch
yr

Fmag
mag

jmag
mag

Vmag
mag

Nmag
mag

Class

a
pix

e

1 2.30420 20 41.94072+66 02 42.4536N1JZ024659305.174753+66.0451261991.66620.1521.07    3 1.94 0.51 222.02920 20 38.31720+66 02 47.5548N1JZ024666305.159655+66.0465431991.66618.1819.1217.8918.030 2.31 0.08 326.82520 20 40.98120+66 03 06.9084N1JZ024677305.170755+66.0519191991.66618.5820.6018.2618.353 2.32 0.06 %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	1.610	20 20 41.87856	+66 02 41.8704	305.174494	+66.044964	-10.6	-24.0			19.51		14.72	18.98		3	0
2	22.384	20 20 38.25912	+66 02 47.6160	305.159413	+66.046560	1.6	-6.5			18.90	19.69	18.09	18.34	17.86	5	0
3	26.856	20 20 40.95528	+66 03 06.9120	305.170647	+66.051920	2.1	-0.5				20.53	18.68	18.62	17.81	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	magRF [****ClosingBrace(s)Inserted****]
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magRF

%20

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

magG
mag

e_
mag

magGrvs
mag

e_
mag

alphaEpoch
yr

deltaEpoch
yr

pmRA
mas/yr

e_
(...)

pmDE
mas/yr

e_
(...)

1 1.60920 20 41.87851+66 02 41.8702305.174494+66.044964 0.133 0.13321.071 0.30020.152 0.30020.352 0.40019.581 0.5001965.96001965.9600 -10.6 7.3 -24.0 7.3 222.38420 20 38.25914+66 02 47.6162305.159413+66.046560 0.103 0.10319.122 0.30018.183 0.30018.386 0.40017.602 0.5001976.58001976.5800 1.6 5.4 -6.5 5.4 326.85620 20 40.95526+66 03 06.9122305.170647+66.051920 0.115 0.11520.600 0.30018.583 0.30018.767 0.40017.290 0.5001982.57001982.5700 2.1 6.9 -0.5 6.9 %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 mag	e_ mag	pmRA mas/yr	pmDE mas/yr	Jmag mag	Hmag mag	Kmag mag	Bmag mag	Vmag mag	gmag mag	rmag mag	imag mag
1	22.128	20 20 38.291245	+66 02 47.39388	781-170377	305.1595469	+66.0464983	2013.485	15.418	0.613
2	26.614	20 20 40.973139	+66 03 06.68582	781-170391	305.1707214	+66.0518572	2013.338	16.186	0.786

%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RA_ICRS deg	e_ mas	DE_ICRS deg	e_ mas	Source	Plx mas	pmRA mas/yr	pmDE mas/yr	RADEcor	Dup [****ClosingBrace(s)Inserted****]
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Dup

%20

%22><FG>
e-/s

e_
e-/s

<Gmag>
mag

Var

121.21220 20 38.260436519+66 02 40.69184278305.1594184855 1.673+66.0446366230 3.9772246472031308853888       0.4520 1.0426e+02 1.5817e+0020.479NOT_AVAILABLE 222.14220 20 38.286677310+66 02 47.35441312305.1595278221 0.298+66.0464873370 0.4522246472027015184896       0.3970 8.9969e+02 3.7676e+0018.140NOT_AVAILABLE 326.59120 20 40.973198337+66 03 06.66202343305.1707216597 0.388+66.0518505621 0.5942246472027015186176       0.1190 5.0377e+02 2.8766e+0018.769NOT_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	22.254	20 20 38.275356384	+66 02 47.50361808	305.1594806516	+66.0465287828	232698443563962480		4.596	-9.947				18.90	19.69	18.09	18.34	17.86	2246472027015184896	18.140
2	26.697	20 20 40.963294152	+66 03 06.75889632	305.1706803923	+66.0518774712	232698447698287635		4.020	-6.458					20.53	18.68	18.62	17.81	2246472027015186176	18.769

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