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	27.480	00 40 31.87008	+41 39 16.8804	1275-00407488	010.132792	+41.654689		*	18.9	17.9	1953.773

%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
1	16.316	00 40 29.98536	+41 39 07.6428	EO0851-0309693	010.124939	+41.652123	19.91		1	4.36	5.2	0.33	21.86	L	0			1.95
2	16.617	00 40 32.10816	+41 38 55.6404	EO0851-0309992	010.133784	+41.648789	19.73		-1	1.57	5.2	0.33	21.86	L	0			2.13
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>16.617&%3cFONT%20COLOR=%27#CD5B45%27>00%2040%2032.10816&%3cFONT%20COLOR=%27#CD5B45%27>%2b41%2038%2055.6404&EO0851-0309992&010.133784&%2b41.648789&19.73&%20&-1&%20%20%201.57&%20%20%205.2&%200.33&21.86&L&%200&%20&%20&%20%202.13&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ661e2203f6df5&-out.add=.&-source=I%2f267%2fout&APM-ID===EO0851-0310476&-out.orig=o' class='full'317.96500 40 31.46472+41 38 37.6620EO0851-0310476010.131103+41.64379519.90  -1 -0.84 4.3 0.2321.86L 0     1.96   422.75800 40 28.61280+41 38 53.1312EO0851-0310067010.119220+41.64809219.87   2 8.08 6.8 0.5621.86L 0     1.99   525.56600 40 31.34208+41 38 28.7520EO0851-0310708010.130592+41.64132020.00L 0      21.78  -1 -0.97 3.5 1.78   627.32000 40 33.07200+41 38 55.3812EO0851-0309997010.137800+41.64871719.82   2 0.93 5.5 0.4821.86L 0     2.04   727.37100 40 31.86888+41 39 16.7616EO0851-0309448010.132787+41.65465616.90   2 19.71 13.9 0.3218.55   1 5.51 10.2 1.66   827.98700 40 33.03480+41 39 01.1304EO0851-0309852010.137645+41.65031420.00L 0      21.40   1 2.16 5.0 1.40   929.05300 40 28.43544+41 39 08.3124EO0851-0309681010.118481+41.65230919.36   2 8.45 8.9 0.6021.86L 0     2.50   1029.95000 40 28.68072+41 38 32.7624EO0851-0310604010.119503+41.64243419.87   2 1.44 5.5 0.4621.86L 0     1.99   %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%2fgalaxy%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:%2f%2fwww.nofs.navy.mil%2fdata%2ffchpix%2f%20%3cBR%3e%0a%3cB%3e%3cFONT%20COLOR=%27#EE0000%27>%20Note%20that%20the%20star%2fgalaxy%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	27.820	00 40 31.85280	+41 39 17.3808	1316-0012701	010.132720	+41.654828	34	83	1972.0	0	8	4	16.40	16.37		16.44	16.10
2	29.136	00 40 28.50216	+41 39 09.6120	1316-0012690	010.118759	+41.652670	999	999	1967.1	138	350	3	15.79	15.80			19.15

%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%2f239%29,%20Tycho-2%20%28I%2f259%29,%20UCAC2%20%28I%2f289%29,%20and%20USNO-B1.0%0a%28I%2f284%29%20catalogs%20for%20astrometry%20and%20optical%20photometry,%20supplemented%0aby%202MASS%20%28II%2f246%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%2fLinux%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_ [****ClosingBrace(s)Inserted****]
">

r_

%22>Rmag
magr_

Jmag
magHmag
magKmag
magR

127.81800 40 31.852656+41 39 17.380081316-0012850YM010.1327194+41.6548278B 0.0 1.0 8.0 2.016.640o16.200Y16.440B15.07614.45414.493   229.13600 40 28.501992+41 39 09.609841316-0012838..010.1187583+41.6526694B 138.0 87.0 350.0 52.015.790o    15.800e         %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20Zone%20-30%2f%2b50deg%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	CMC14	f_	RAICRS deg	DEICRS deg	r'mag mag	Nt	Jmag mag	Hmag mag	Ksmag mag
1	26.915	00 40 28.27272	+41 38 48.7932	004028.2+413848		010.117803	+41.646887	17.272	1
2	27.609	00 40 31.87248	+41 39 17.0136	004031.8+413917		010.132802	+41.654726	15.791	3	15.077	14.454	14.493

%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	27.578	00 40 31.87632	+41 39 16.9524	010.132818	+41.654709	7.3	-0.6	15.077	14.493	16.40		16.37	16.44	16.10	5	0
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>27.578&%3cFONT%20COLOR=%27#CD5B45%27>00%2040%2031.87632&%3cFONT%20COLOR=%27#CD5B45%27>%2b41%2039%2016.9524&010.132818&%2b41.654709&%20%20%20%20%207.3&%20%20%20%20-0.6&15.077&14.493&16.40&%20&16.37&16.44&16.10&%205&%200%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ661e2203f6df5&-out.add=.&-source=I%2f317%2fsample&PPMXL===2211810111758272925' class='full'228.68600 40 28.52904+41 39 09.2556010.118871+41.652571 167.9 329.3    15.79  15.80  19.15 3 1 %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	Fmag mag	Bjmag 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	27.560	00 40 31.87872	+41 39 16.9163	XPM 263-0017188	010.132828	+41.654699	4.66	0.47	4.60	0.89					15.077	0.055	14.454	0.068	14.493	0.099	1190501513	18.9	17.9	194	47.042374	0	0	M

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

RAJ2000

%20

%22>%5cFONT SIZE=-1degDEJ2000
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_
(...)

127.57700 40 31.87632+41 39 16.9519010.132818+41.654709 0.071 0.07116.400 0.40016.440 0.40016.412 0.40016.362 0.5001989.92001989.9200 7.3 3.9 -0.6 3.9 228.68600 40 28.52909+41 39 09.2559010.118871+41.652571 0.163 0.13315.790 0.40015.800 0.40015.781 0.40015.707 0.5001967.11001967.1100 167.9 7.7 329.3 7.0 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20Zone%20-40%2f%2b50deg%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	CMC15	RA_ICRS deg	DE_ICRS deg	r'mag mag	pflag	Nt	Jmag mag	Hmag mag	Ksmag mag
1	26.932	00 40 28.27126	+41 38 48.7861	004028.2+413848	010.117797	+41.646885	17.272		1
2	27.596	00 40 31.87128	+41 39 17.0064	004031.8+413917	010.132797	+41.654724	15.791		3	15.077	14.454	14.493
3	27.799	00 40 28.48515	+41 39 06.7896	004028.4+413906	010.118688	+41.651886	16.347	:	1
4	28.081	00 40 28.23578	+41 38 45.3156	004028.2+413845	010.117649	+41.645921	16.905	:	1
5	28.876	00 40 28.21970	+41 39 02.8834	004028.2+413902	010.117582	+41.650801	17.733	:	1
6	29.944	00 40 28.31594	+41 39 07.7942	004028.3+413907	010.117983	+41.652165	17.370	:	1

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

Kmag

%20

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

Vmag
mag

gmag
mag

rmag
mag

imag
mag

121.48000 40 30.326557+41 39 14.27291659-010279010.1263607+41.65396472013.64019.803                       227.66900 40 31.879572+41 39 16.89892659-010286010.1328197+41.65473752013.33216.259 0.016 -2.4 11.715.07714.45414.493           328.16400 40 28.448553+41 39 06.80393659-010268010.1185356+41.65189002013.32118.928 0.117                     %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	<FG> e-/s	e_ e-/s	<Gmag> mag	Var
1	21.555	00 40 30.340524598	+41 39 14.37486691	010.1264188525	18.050	+41.6539930186	17.488	381334413746738688				0.735	0	1.9737e+02	3.0051e+00	19.787	NOT_AVAILABLE
2	27.649	00 40 31.876238218	+41 39 17.03537194	010.1328176592	5.015	+41.6547320478	1.744	381334409456608256				-0.640	0	1.6494e+03	2.3384e+01	17.481	NOT_AVAILABLE
3	28.243	00 40 28.447421756	+41 39 06.94296879	010.1185309240	18.221	+41.6519286024	56.225	381334482469766784				0.382	0	4.8521e+02	4.0447e+00	18.810	NOT_AVAILABLE

%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