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	7.313	01 26 40.90272	+02 01 32.0304	0900-00340148	021.670428	+02.025564			17.3	15.3	1954.830
2	8.083	01 26 40.93200	+02 01 27.9408	0900-00340150	021.670550	+02.024428			19.4	17.5	1954.830

%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	1.013	01 26 41.33952	+02 01 31.5300	0920-0015658	021.672248	+02.025425	424	129	1977.7	0	0	2	18.00				14.03
2	4.545	01 26 41.13480	+02 01 34.6404	0920-0015656	021.671395	+02.026289	999	999	1972.7	0	0	2	18.46			16.02
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%204.545&%3cFONT%20COLOR=%27#CD5B45%27>01%2026%2041.13480&%3cFONT%20COLOR=%27#CD5B45%27>%2b02%2001%2034.6404&0920-0015656&021.671395&%2b02.026289&999&999&1972.7&%20%20%20%20%200&%20%20%20%20%200&2&18.46&%20&%20&16.02&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66413907195ac0&-out.add=.&-source=I/284/out&USNO-B1.0===0920-0015653&-out.orig=o' class='full'3 6.46601 26 40.97544+02 01 30.43200920-0015653021.670731+02.0251202158631970.1 22 -30318.1115.23    15.24 4 6.55001 26 41.27688+02 01 25.87080920-0015657021.671987+02.0238532398991977.7 0 02  16.32    15.04 5 8.06801 26 40.85544+02 01 31.31040920-0015651021.670231+02.0253642124731982.7 42 -363  17.5115.73  14.71 %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	1.015	01 26 41.339328	+02 01 31.53000	0920-0015794	..	021.6722472	+02.0254250	B	0.0	0.0	0.0	0.0	18.000	o
2	4.547	01 26 41.134656	+02 01 34.64004	0920-0015792	..	021.6713944	+02.0262889	B	0.0	0.0	0.0	0.0	18.460	o			16.020	B
3	6.468	01 26 40.975344	+02 01 30.42984	0920-0015789	..	021.6707306	+02.0251194	B	22.0	5.0	-30.0	23.0	18.110	o			15.230	e
4	6.552	01 26 41.276664	+02 01 25.87008	0920-0015793	.M	021.6719861	+02.0238528	B	0.0	0.0	0.0	0.0					16.320	e	16.306	14.061	15.237
5	7.796	01 26 41.684136	+02 01 25.76208	0920-0015797	.M	021.6736839	+02.0238228	M	0.0	0.0	0.0	0.0							15.019	13.154	12.872
6	8.070	01 26 40.855344	+02 01 31.31004	0920-0015787	..	021.6702306	+02.0253639	B	42.0	8.0	-36.0	17.0	15.730	B			17.510	e

%0a%0a

>	\BegDIVclass='sort-down ' </A>
dec 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	1.389	01 26 41.31312	+02 01 31.4292	021.672138	+02.025397	-5.0	-5.4			18.00				14.03	2	0
2	5.101	01 26 41.26008	+02 01 27.4836	021.671917	+02.024301	1.4	33.2	16.306	15.238			16.32		15.04	3	1
3	5.236	01 26 41.17536	+02 01 36.3216	021.671564	+02.026756	65.9	36.7			18.46			16.02		2	0
4	6.476	01 26 40.97664	+02 01 30.3348	021.670736	+02.025093	27.6	-39.6			18.11		15.23		15.24	3	0
5	8.140	01 26 40.84992	+02 01 31.4076	021.670208	+02.025391	44.1	-35.7				15.73	17.51		14.71	3	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	e_ mag	magG mag	e_ mag	magGrvs mag	e_ mag	alphaEpoch yr	deltaEpoch yr	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)
1	5.101	01 26 41.26007	+02 01 27.4838	021.671917	+02.024301	0.104	0.117	20.872	0.500	16.320	0.400	14.073	0.400	11.964	0.500	1991.2500	1991.2500	1.4	5.6	33.2	5.8
2	5.236	01 26 41.17533	+02 01 36.3218	021.671564	+02.026756	0.163	0.163	18.460	0.400	16.020	0.400	16.071	0.400	14.376	0.500	1972.7300	1972.7300	65.9	9.1	36.7	9.1
3	6.475	01 26 40.97666	+02 01 30.3351	021.670736	+02.025093	0.133	0.133	18.110	0.400	15.230	0.400	15.047	0.400	13.164	0.500	1970.1200	1970.1200	27.6	6.1	-39.6	6.1
4	7.794	01 26 41.68396	+02 01 25.7633	021.673683	+02.023823	0.299	0.299	19.165	0.500	16.727	0.500	16.778	0.400	15.083	0.500	2000.6800	2000.6800	0.0	0.0	0.0

%0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2 [****ClosingBrace(s)Inserted****]
">

GSC2

%22>RA_ICRS
degDE_ICRS
degobjID

Epoch
yrClass

Gmag
magOMag
magBjmag
magFpgmag
magEpgmag
magNpgmag
magUmag
magBmag
magVmag
magumag
maggmag
magrmag
magimag
magzmag
magymag
magJmag
magHmag
magKsmag
magZmag
magYmag
magW1mag
magW2mag
magW3mag
magW4mag
magFUVmag
magNUVmag
maga
pixe
pixPA
pix 1 1.26001 26 41.5673550300+02 01 34.986959828NBR7051941021.67280400000+02.02567540000 13232003519412010.5604                                        12.92712.88910.572 8.918           2 4.87701 26 41.2519200000+02 01 27.782400000NBR7015376021.67188300000+02.02438400000 13232003153762000.6780                               16.306   15.238                       3 7.79601 26 41.6841600000+02 01 25.762800000NBR7015378021.67368400000+02.02382300000 13232003153782000.6780                               15.020                           4 8.60101 26 40.8351675839+02 01 30.028984261NBR7017879021.67014653160+02.02500805118 13232003178792008.7553                  23.84523.31823.06720.52722.827                               5 9.61801 26 40.7488272000+02 01 32.299752000NBR7015545021.66978678000+02.02563882000 13232003155452014.2913                  22.64922.63620.55319.17921.753                               %0a%0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	2MASS	Jmag mag	e_Jmag mag	Hmag mag	e_Hmag mag	Kmag mag	e_Kmag mag	Qflg	Rflg	Bflg	Cflg	Xflg	Aflg
1	4.877	01 26 41.25192	+02 01 27.7824	021.671883	+02.024384	01264125+0201277	16.306	0.292	14.062		15.238	0.306	DUD	202	101	000	2	0
2	7.796	01 26 41.68416	+02 01 25.7628	021.673684	+02.023823	01264168+0201257	15.020	0.222	13.155		12.873		DUU	200	100	000	2	0

%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	SN	n_	Gname	RAG "h:m:s"	DEG "d:m:s"	Gi deg	[****ClosingBrace(s)Inserted****]
">

deg&%">\BegDIVclass='sort-down ' </A>decGVhel
km/sGtype

mag
magl_

Type

RA2000
"h:m:s"DE2000
"d:m:s"Disc

1 0.32901 26 41.40000+02 01 31.90001961Q  N 55001 26 43+02 01.368 5829.S.S1.17.2>  01 26 41.400+02 01 31.90Humason %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"	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	7.300	01 26 40.90387	+02 01 32.5130	021.670433	+02.025698	21.110	0.296	20.113	0.178	0.393155	3	0	0	0	3	13.16	13.16

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20please%20%3cB%3e%3cFONT%20COLOR=%27#8B0000%27>credit%20the%20usage%20of%20the%20UKIDSS%20data%20%28details%20at%20http://www.ukidss.org/archive/archive.html%29%3cP%3e%0a