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	4.074	15 25 21.81936	+58 49 19.1028	1425-08297087	231.340914	+58.821973			19.1	19.5	1953.452

%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	3.620	15 25 21.74016	+58 49 18.9300	EO0755-0169707	231.340584	+58.821925	18.89		1	4.51	6.9	0.33	19.24		1	19.64	11.6	0.36	*
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%203.620&%3cFONT%20COLOR=%27#CD5B45%27>15%2025%2021.74016&%3cFONT%20COLOR=%27#CD5B45%27>%2b58%2049%2018.9300&EO0755-0169707&231.340584&%2b58.821925&18.89&%20&%201&%20%20%204.51&%20%20%206.9&%200.33&19.24&%20&%201&%20%2019.64&%20%2011.6&%20%200.36&%2a%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66413d0a2527e4&-out.add=.&-source=I/267/out&APM-ID===EO0755-0169644&-out.orig=o' class='full'2 6.95015 25 22.16616+58 49 23.6712EO0755-0169644231.342359+58.82324219.86   2 9.08 6.3 0.7119.24   1 19.64 11.6 -0.62* %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	4.680	15 25 21.90864	+58 49 19.1784	N11300105231	231.341286	+58.821994	1992.326			19.44	0.33	3	5.68	0.37

%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	4.670	15 25 21.93000	+58 49 19.7328	1488-0226994	231.341375	+58.822148	379	152	1984.5	12	16	4	19.62		19.55	17.74	18.73
2	5.235	15 25 21.70800	+58 49 16.4532	1488-0226993	231.340450	+58.821237	724	679	1972.8	0	0	2	20.14		21.00
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">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%205.235&%3cFONT%20COLOR=%27#CD5B45%27>15%2025%2021.70800&%3cFONT%20COLOR=%27#CD5B45%27>%2b58%2049%2016.4532&1488-0226993&231.340450&%2b58.821237&724&679&1972.8&%20%20%20%20%200&%20%20%20%20%200&2&20.14&%20&21.00&%20&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66413d0a2527e4&-out.add=.&-source=I/284/out&USNO-B1.0===1488-0226995&-out.orig=o' class='full'3 6.53215 25 21.97152+58 49 16.50001488-0226995231.341548+58.8212503289991974.3 0 0219.77    19.63   4 8.05115 25 22.38072+58 49 21.47161488-0226996231.343253+58.8226319998571973.5 92 30420.1319.9621.0019.98   %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	4.671	15 25 21.930000	+58 49 19.72992	1488-0233586	..	231.3413750	+58.8221472	B	12.0	15.0	16.0	6.0	19.550	B			17.740	B
2	5.238	15 25 21.708000	+58 49 16.44996	1488-0233585	..	231.3404500	+58.8212361	B	0.0	0.0	0.0	0.0	21.000	B
3	6.531	15 25 21.971328	+58 49 16.50000	1488-0233587	..	231.3415472	+58.8212500	B	0.0	0.0	0.0	0.0	19.770	o			19.630	B
4	8.050	15 25 22.380672	+58 49 21.47016	1488-0233588	..	231.3432528	+58.8226306	B	92.0	34.0	30.0	25.0	21.000	B			19.980	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"	[****ClosingBrace(s)Inserted****]
">

%22h:m:s%22&%">\BegDIVclass='sort-down ' </A>string _DEJ2000
"d:m:s"GSC2.3

RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 4.90315 25 21.93792+58 49 19.1496N4JO005231231.341408+58.8219861995.15518.7719.4419.16  3 5.21 0.48 %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	4.658	15 25 21.92592	+58 49 19.6572	231.341358	+58.822127	4.7	20.0			19.62	19.55		17.74	18.73	4	0
2	5.144	15 25 21.61248	+58 49 16.1616	231.340052	+58.821156	-22.7	-15.0			20.14	21.00				2	0
3	6.864	15 25 21.99696	+58 49 16.2228	231.341654	+58.821173	4.4	-24.5			19.77			19.63		2	0
4	8.162	15 25 22.39440	+58 49 21.5364	231.343310	+58.822649	97.9	30.9			20.13	21.00	19.96	19.98		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 [****ClosingBrace(s)Inserted****]
">

magBJ

%20

%22>%5cFONT SIZE=-1mage_
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 4.21915 25 21.84362+58 49 19.1649231.341015+58.821990 0.060 0.07419.440 0.30018.768 0.30018.925 0.09018.185 0.1172006.39002006.3900 4.7 6.4 20.0 6.4 2 6.86415 25 21.99692+58 49 16.2231231.341654+58.821173 0.163 0.16319.770 0.40019.630 0.40019.654 0.40019.465 0.5001974.30001974.3000 4.4 7.8 -24.5 7.8 3 8.16215 25 22.39443+58 49 21.5360231.343310+58.822649 0.115 0.11521.000 0.40019.980 0.40020.193 0.40019.352 0.5001973.59001973.5900 97.9 5.7 30.9 5.7 %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	4.708	15 25 21.915922	+58 49 19.25009	231.3413163	719.00	+58.8220139	180.00	55044+0005231	4	10.8	21.6	-0.6	5.4	4	41.702	18.768	19.440		19.164

%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"	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 4.10215 25 21.8717242426+58 49 20.173884347231.34098538286+58.8220373252920.716095 -27.359 105.160 83.843 178.159 1.91601e-01   -83.951 55.180 92.109 78.107 5.88247e-01   5 0PS1Gaia DR9+DR12Sloan2M 2 4.15015 25 21.8280218412+58 49 19.784434083231.34104626815+58.8220828935320.710917 17.925 108.552 17.925 108.552 7.97353e-03   -28.602 47.752 -28.602 47.752 2.38717e+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	4.106	15 25 21.8480568000	+58 49 19.565184000	N4JO042271	231.34103357000	+58.82210144000	1113001042271	2012.352	3											20.787	20.762	20.861	20.497	20.1165
[****ClosingBrace(s)Inserted****]
1	4.106	15 25 21.8480568000	+58 49 19.565184000	N4JO042271	231.34103357000	+58.82210144000	1113001042271	2012.352	3											20.787	20.762	20.861	20.497	20.1165

%22>\Ahref='VizieR-5?-ref=VIZ66413d0a2527e4&-out.add=.&-source=I/353/gsc242&-c=231.34105643000%20%2b58.82211174000,eq=ICRS,rs=2&-out.orig=o' class='full'2 4.13515 25 21.8535432000+58 49 19.602264000N4JO040909231.34105643000+58.82211174000 11130010409092011.8323                    21.135  20.12319.875            16.92617.09512.459 9.64621.34320.901       3 4.89815 25 21.8904153870+58 49 18.618160103N4JO005231231.34129107000+58.82185160000 1113001052312013.5663  19.42120019.44010018.768900          20.11520.74920.73120.12220.169                         5.211 0.481 71.9 4 8.28615 25 20.3895024000+58 49 17.215500000N4JO041613231.33495626000+58.82144875000 11130010416132014.3993                      17.743                                   %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	4.172	15 25 21.85269	+58 49 19.4553	1	3	J152521.85+584919.4			20.548	0.148	19.495	0.024	19.108	0.027	18.841	0.036	18.684	0.126	231.341051	+58.822072	2000.3211	2

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