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	0.770	16 32 59.18472	+31 57 43.9308	1200-07924482	248.246603	+31.962203			18.8	19.0	1954.487
2	1.932	16 32 59.06400	+31 57 43.1424	1200-07924468	248.246100	+31.961984			19.0	18.6	1954.487
3	3.681	16 32 58.94280	+31 57 42.0408	1200-07924454	248.245595	+31.961678			19.3	18.5	1954.487

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

b-r

%22>%5cFONT SIZE=-1magMflag

1 2.38916 32 59.03016+31 57 42.8832EO1097-0043787248.245959+31.96191218.99   1 7.19 10.0 0.5820.02   1 13.40 13.3 1.03   %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	2.081	16 32 59.05248	+31 57 43.4304	N13221225754	248.246052	+31.962064	1991.283	17.99	0.43	19.29	0.37	3	6.66	0.66

%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	0.969	16 32 59.15472	+31 57 43.8516	1219-0284566	248.246478	+31.962181	264	269	1974.4	0	0	4	19.54	19.32		17.76	18.70
2	2.053	16 32 59.05416	+31 57 43.2504	1219-0284565	248.246059	+31.962014	171	101	1978.0	0	0	5	19.74	18.94	18.55	18.41	17.51
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%202.053&%3cFONT%20COLOR=%27#CD5B45%27>16%2032%2059.05416&%3cFONT%20COLOR=%27#CD5B45%27>%2b31%2057%2043.2504&1219-0284565&248.246059&%2b31.962014&171&101&1978.0&%20%20%20%20%200&%20%20%20%20%200&5&19.74&18.94&18.55&18.41&17.51%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663a66f227140&-out.add=.&-source=I/284/out&USNO-B1.0===1219-0284568&-out.orig=o' class='full'3 3.06816 32 59.38800+31 57 45.41041219-0284568248.247450+31.962614418 831980.7 34 283  19.7120.54  19.08 4 3.20516 32 58.96608+31 57 42.82201219-0284564248.245692+31.961895301 991973.9 10 18420.0518.80  18.4318.25 5 6.13616 32 58.76208+31 57 41.18041219-0284563248.244842+31.9614391142501972.8 0 0220.61    18.66   %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	0.968	16 32 59.154672	+31 57 43.85016	1219-0288544	..	248.2464778	+31.9621806	B	0.0	0.0	0.0	0.0	19.540	o			17.760	B
2	2.055	16 32 59.053992	+31 57 43.25004	1219-0288543	..	248.2460583	+31.9620139	B	0.0	0.0	0.0	0.0	18.550	B			18.410	B
3	3.067	16 32 59.388000	+31 57 45.41004	1219-0288546	..	248.2474500	+31.9626139	B	34.0	15.0	28.0	3.0	20.540	B			19.710	e
4	3.206	16 32 58.966008	+31 57 42.81984	1219-0288542	..	248.2456917	+31.9618944	B	10.0	9.0	18.0	3.0	20.050	o			18.430	B
5	6.137	16 32 58.762008	+31 57 41.18004	1219-0288541	..	248.2448417	+31.9614389	B	0.0	0.0	0.0	0.0	20.610	o			18.660	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 [****ClosingBrace(s)Inserted****]

">

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

%20

%22> _r
arcsec

_RAJ2000
"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 2.56916 32 59.01888+31 57 42.6852N61M005754248.245912+31.9618571989.34918.5619.2918.8818.133 4.95 0.69 %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	1.292	16 32 59.12472	+31 57 43.8480	248.246353	+31.962180	-11.4	-1.9			19.54		19.32	17.76	18.70	4	0
2	2.270	16 32 59.03760	+31 57 43.1028	248.245990	+31.961973	-6.7	-4.0			19.74	18.55	18.94	18.41	17.51	5	0
3	2.753	16 32 59.36856	+31 57 45.2124	248.247369	+31.962559	25.7	23.1				20.54	19.71		19.08	3	0
4	3.389	16 32 58.95456	+31 57 42.5880	248.245644	+31.961830	5.1	11.7			20.05		18.80	18.43	18.25	4	0
5	6.316	16 32 58.74624	+31 57 41.2092	248.244776	+31.961447	-8.0	0.3			20.61			18.66		2	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 [****ClosingBrace(s)Inserted****]
">

DEJ2000

%20

%22>%5cFONT SIZE=-1dege_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 2.26916 32 59.03761+31 57 43.1031248.245990+31.961973 0.103 0.10318.550 0.40018.410 0.40018.435 0.40018.244 0.5001978.01001978.0100 -6.7 5.3 -4.0 5.3 2 2.75216 32 59.36852+31 57 45.2119248.247369+31.962559 0.133 0.13320.540 0.40019.710 0.40019.895 0.40019.188 0.5001980.79001980.7900 25.7 7.1 23.1 7.1 3 2.97516 32 58.98605+31 57 42.6954248.245775+31.961860 0.065 0.06519.294 0.30018.561 0.30018.642 0.08517.785 0.1142003.32002003.3200 5.1 5.9 11.7 5.9 4 6.31616 32 58.74624+31 57 41.2088248.244776+31.961447 0.163 0.16320.610 0.40018.660 0.40018.857 0.40017.419 0.5001972.88001972.8800 -8.0 8.8 0.3 8.8 %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	2.172	16 32 59.047136	+31 57 42.90994	248.2460297	212.00	+31.9619194	87.00	56986+0005754	4	-9.7	7.8	-3.4	3.2	6	39.814	18.561	19.294	18.127	18.882

%0a%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 [****ClosingBrace(s)Inserted****]
">

Gmag

%20

%22>%5cFONT SIZE=-1magOMag
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 1.16416 32 59.1263016000+31 57 43.527924000N61M049459248.24635959000+31.96209109000 11322122494592012.8043                  22.29421.00521.65820.52719.92619.8002                  21.71721.442       2 2.29916 32 59.0506621255+31 57 43.069148556N61M005754248.24598284000+31.96195007000 1132212257542011.9893  20.13970019.29460018.561100  18.127400      20.47720.99620.69220.28420.15219.6096          16.43816.32312.143 9.131     4.952 0.691151.2 %0a%0a%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20SDSS%20is%20also%20available%20from%20http://www.sdss.org/%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	mode	cl	SDSS	m_	zsp	umag mag	e_ mag	gmag mag	e_ mag	rmag mag	e_ mag	imag mag	e_ mag	zmag mag	e_ mag	RA_ICRS deg	DE_ICRS deg	ObsDate yr	Q
1	2.338	16 32 59.03180	+31 57 43.0782	2	3	J163259.03+315743.0			20.126	0.116	19.146	0.018	18.664	0.017	18.385	0.023	18.273	0.066	248.245968	+31.961968	2003.3244	3
2	2.675	16 32 59.00642	+31 57 42.7999	1	3	J163259.00+315742.8			20.378	0.155	19.117	0.019	18.594	0.020	18.272	0.024	18.095	0.077	248.245867	+31.961898	2002.3526	3
3	3.121	16 32 59.40288	+31 57 45.2808	1	3	J163259.40+315745.2			21.249	0.228	23.709	0.657	24.853	1.508	24.151	1.635	20.179	0.321	248.247512	+31.962578	2002.3526	3

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