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	2.591	02 41 10.16472	-21 01 30.4104	0675-00931865	040.292353	-21.025114			19.0	18.0	1982.353
2	2.783	02 41 10.12680	-21 01 31.3608	0675-00931860	040.292195	-21.025378			19.2	18.2	1984.777

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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	1.003	02 41 10.06200	-21 01 29.7300	0689-0029059	040.291925	-21.024925	999	195	1975.7	0	0	2		19.30			19.28
2	2.801	02 41 10.15680	-21 01 30.9612	0689-0029061	040.292320	-21.025267	491	466	1976.5	0	0	5	19.55	19.02	19.82	19.10	19.15
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%202.801&%3cFONT%20COLOR=%27#CD5B45%27>02%2041%2010.15680&%3cFONT%20COLOR=%27#CD5B45%27>-21%2001%2030.9612&0689-0029061&040.292320&-21.025267&491&466&1976.5&%20%20%20%20%200&%20%20%20%20%200&5&19.55&19.02&19.82&19.10&19.15%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6621f1a52c4cc2&-out.add=.&-source=I/284/out&USNO-B1.0===0689-0029060&-out.orig=o' class='full'3 3.58302 41 10.12608-21 01 32.33280689-0029060040.292192-21.0256482759391974.2 0 0220.10    18.73   %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	1.003	02 41 10.062000	-21 01 29.73000	0689-0029243	..	040.2919250	-21.0249250	B	0.0	0.0	0.0	0.0					19.300	e
2	2.799	02 41 10.156656	-21 01 30.96012	0689-0029245	..	040.2923194	-21.0252667	B	0.0	0.0	0.0	0.0	19.820	B			19.100	B
3	3.580	02 41 10.126008	-21 01 32.32992	0689-0029244	..	040.2921917	-21.0256472	B	0.0	0.0	0.0	0.0	20.100	o			18.730	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 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.3 [****ClosingBrace(s)Inserted****]
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GSC2.3

%22>RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 2.64602 41 10.16784-21 01 30.4464S2MV003530040.292366-21.0251241997.65818.8720.24    3 4.14 0.46 %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	0.313	02 41 10.01016	-21 01 29.4924	040.291709	-21.024859	-10.9	-6.8					19.30		19.28	2	0
2	2.599	02 41 10.12848	-21 01 31.0944	040.292202	-21.025304	5.1	17.6			20.10			18.73		2	0
3	2.752	02 41 10.17000	-21 01 30.6084	040.292375	-21.025169	23.1	-11.5			19.55	19.82	19.02	19.10	19.15	5	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	[****ClosingBrace(s)Inserted****]
">

mag&%">\BegDIVclass='sort-down ' </A>dece_
magmagG
mage_
magmagGrvs
mage_
magalphaEpoch
yrdeltaEpoch
yrpmRA
mas/yre_
(...)pmDE
mas/yre_
(...) 1 2.59802 41 10.12848-21 01 31.0938040.292202-21.025304 0.163 0.16320.100 0.40018.730 0.40018.971 0.40017.891 0.5001974.23001974.2300 5.1 7.2 17.6 7.2 2 2.75202 41 10.17002-21 01 30.6080040.292375-21.025169 0.103 0.10320.243 0.30018.869 0.30019.110 0.40018.027 0.5001976.52001976.5200 23.1 4.8 -11.5 4.8 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a

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	3.223	02 41 10.192137	-21 01 31.00006	040.2924672	85.00	-21.0252778	157.00	36183+0003530	4	49.5	7.9	-6.3	14.5	3	15.895	18.869	20.243

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RA_ICRS deg	DE_ICRS deg	rmag mag	pmRA mas/yr	e_ (...)	pmxRA [****ClosingBrace(s)Inserted****]
">

pmxRA

%20

%22>%5cFONT SIZE=-1mas/yre_
(...)

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 3.25502 41 10.1218040084-21 01 30.391684637040.29246787801-21.0252926118720.769249 98.691 40.561 98.691 40.561 2.15615e+00   -66.172 24.866 -66.172 24.866 1.16774e+00   3 0PS1Gaia DR9+DR12Sloan2M %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	Class	Gmag mag	OMag mag	Bjmag mag	Fpgmag mag	Epgmag mag	Npgmag mag	Umag mag	Bmag mag	Vmag mag	umag mag	gmag mag	rmag mag	imag mag	zmag mag	ymag mag	Jmag mag	Hmag mag	Ksmag mag	Zmag mag	Ymag mag	W1mag mag	W2mag mag	W3mag mag	W4mag mag	FUVmag mag	NUVmag mag	a pix	e pix	PA pix
1	0.387	02 41 10.0011552000	-21 01 29.594856000	S2MV016686	040.29167148000	-21.02488746000	2031111316686	2013.581	3											19.887	17.301	20.804	18.566
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1	0.387	02 41 10.0011552000	-21 01 29.594856000	S2MV016686	040.29167148000	-21.02488746000	2031111316686	2013.581	3											19.887	17.301	20.804	18.566

%22>\Ahref='VizieR-5?-ref=VIZ6621f1a52c4cc2&-out.add=.&-source=I/353/gsc242&-c=040.29227099000%20-21.02518209000,eq=ICRS,rs=2&-out.orig=o' class='full'2 2.48502 41 10.1495940075-21 01 30.679709611S2MV003530040.29227099000-21.02518209000 2031111335302013.2193  20.52760020.24380018.869100            21.34620.98120.67220.571                    21.59721.652 4.136 0.459 12.5 3 3.60002 41 10.2159024000-21 01 31.180008000S2MV042167040.29256626000-21.02532778000 20311113421672012.1153                    21.25320.78820.91020.084                               4 4.53202 41 10.2817464000-21 01 31.459548000S2MV041154040.29284061000-21.02540543000 20311113411542010.4643                          20.461            16.96916.63612.896 9.512           %0a%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"	WISE	RAJ2000 deg	DEJ2000 deg	eeMaj arcsec	eeMin arcsec	Im	W1mag mag	e_ mag	W2mag mag	e_ mag	W3mag mag	e_ mag	W4mag mag	e_ mag	Jmag mag	Hmag mag	Kmag mag	ccf	ex	var	d2M arcsec	2M
1	3.904	02 41 10.21288	-21 01 31.7418	J024110.21-210131.7	040.292554	-21.025484	0.926	0.835	Im	17.370	0.150	17.025	0.372	12.561		9.515					0000	0	nnnn		2M

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 [****ClosingBrace(s)Inserted****]
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%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_DEJ2000

%20

%22>%5cFONT SIZE=-1"d:m:s"RAJ2000
deg

DEJ2000
deg

FUV
mag

e_
mag

NUV
mag

e_
mag

r.fov
deg

b

Fafl

Nafl

Fexf

Nexf

Fr
arcsec

Nr
arcsec

1 2.67102 41 10.09781-21 01 31.5084040.292074-21.02541921.571 0.28221.628 0.285 0.1507053 0 0 0 0 4.99 4.99 %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"	AllWISE	RAJ2000 deg	DEJ2000 deg	Im	W1mag mag	e_ mag	W2mag mag	e_ mag	W3mag mag	e_ mag	W4mag mag	e_ mag	Jmag mag	e_ mag	Hmag mag	e_ mag	Kmag mag	e_ mag	ccf	ex	var	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	qph	d2M arcsec	2M
1	4.259	02 41 10.244923	-21 01 31.74914	J024110.24-210131.7	040.2926872	-21.0254859	Im	16.969	0.087	16.636	0.234	12.896	0.506	9.512								0000	0	nnnn	243	699	-264	716	ABCU		2M

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