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	4.014	01 33 15.74400	+40 48 43.1424	1275-00924451	023.315600	+40.811984			18.0	16.1	1953.707
2	7.915	01 33 16.28280	+40 48 45.3600	1275-00924536	023.317845	+40.812600			18.1	17.1	1953.707

%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	5.365	01 33 15.97536	+40 48 44.4024	EO0824-0317656	023.316564	+40.812334	15.63		2	32.20	19.4	0.57	18.42		1	16.21	18.5	2.79
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%205.365&%3cFONT%20COLOR=%27#CD5B45%27>01%2033%2015.97536&%3cFONT%20COLOR=%27#CD5B45%27>%2b40%2048%2044.4024&EO0824-0317656&023.316564&%2b40.812334&15.63&%20&%202&%20%2032.20&%20%2019.4&%200.57&18.42&%20&%201&%20%2016.21&%20%2018.5&%20%202.79&%20%3cBR%3e">\EndTABLESORT

Note: The construction of the GSC-II is still in progress: this version has no proper motions, and the magnitude limits are 18.5 in F (red) and 19.5 in J (blue). The data are copyrighted, check the data use Policy.

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	4.048	01 33 15.69912	+40 48 43.0020	N330331319230	023.315413	+40.811945	1989.765	14.84	0.42	16.00	0.42	3	4.78	0.10
2	8.723	01 33 16.34592	+40 48 45.8100	N330331319229	023.318108	+40.812725	1989.765	17.43	0.42	19.17	0.43	0	2.58	0.09

%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	4.661	01 33 15.74088	+40 48 43.8012	1308-0027082	023.315587	+40.812167	150	169	1977.1	2	14	5	18.39	15.65	14.66	13.98	14.24
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%204.661&%3cFONT%20COLOR=%27#CD5B45%27>01%2033%2015.74088&%3cFONT%20COLOR=%27#CD5B45%27>%2b40%2048%2043.8012&1308-0027082&023.315587&%2b40.812167&150&169&1977.1&%20%20%20%20%202&%20%20%20%2014&5&18.39&15.65&14.66&13.98&14.24%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66435794b180a&-out.add=.&-source=I/284/out&USNO-B1.0===1308-0027085&-out.orig=o' class='full'2 8.07601 33 16.27800+40 48 45.61201308-0027085023.317825+40.8126701871351977.1 0 0518.5916.9517.8716.7016.55 3 9.12801 33 16.46544+40 48 44.97121308-0027086023.318606+40.8124929999181965.7 282 -26320.2219.78  16.15   %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/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	4.660	01 33 15.740664	+40 48 43.80012	1308-0027680	YM	023.3155861	+40.8121667	B	2.0	5.0	14.0	5.0	18.330	Y	16.720	Y	13.980	B	15.772	15.810	15.195
2	4.944	01 33 15.618456	+40 48 43.54488	1308-0027679	.M	023.3150769	+40.8120958	M	0.0	0.0	0.0	0.0							16.347	15.086	14.503
3	8.075	01 33 16.278000	+40 48 45.60984	1308-0027683	YM	023.3178250	+40.8126694	B	0.0	0.0	0.0	0.0	17.870	B	17.400	Y	16.700	B	16.006	15.445	15.413
4	9.127	01 33 16.465344	+40 48 44.97012	1308-0027684	..	023.3186056	+40.8124917	B	282.0	38.0	-26.0	24.0	20.220	o			16.150	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 [****ClosingBrace(s)Inserted****]
">

%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_RAJ2000

%22>%5cFONT SIZE=-1"h:m:s" _DEJ2000
"d:m:s"GSC2.3

RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 4.05001 33 15.69936+40 48 43.0056NC1J019230023.315414+40.8119461989.76514.8416.0016.9816.013 4.78 0.10 2 8.72301 33 16.34592+40 48 45.8100NC1J019229023.318108+40.8127251989.76517.4319.5518.3016.793 2.58 0.09 %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	4.717	01 33 15.64560	+40 48 43.4556	023.315190	+40.812071	-27.5	5.1	15.772	15.196	18.39	14.66	15.65	13.98	14.24	7	1
2	8.339	01 33 16.31592	+40 48 45.5976	023.317983	+40.812666	13.7	1.0	16.006	15.413	18.59	17.87	16.95	16.70	16.55	6	0
3	8.834	01 33 16.39992	+40 48 45.3744	023.318333	+40.812604	270.0	-20.3	16.006	15.413	20.22		19.78	16.15		4	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	[****ClosingBrace(s)Inserted****]
">

mas/yr&%">\BegDIVclass='sort-down ' </A>decFmag
magBjmag
magVmag
magNmag
magJmag
mage_
magHmag
mage_
magKmag
mage_
mag2Mkey

Bmag
magRmag
magFld

dT
yrfg

fs

M

1 3.87901 33 15.80400+40 48 43.1315XPM 261-0036110023.315850+40.811981 18.90 2.25 18.97 2.6814.83615.99516.97716.01415.772  15.810 0.17915.196 0.164 38797436418.016.1 19645.12931400M 2 8.61501 33 16.35143+40 48 45.6085XPM 261-0036116023.318131+40.812669 21.05 7.86 21.11 8.2917.43219.55418.30416.78916.006 0.09615.445 0.13115.413 0.186 38797436818.117.1 19645.12931400M %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	3.870	01 33 15.80154	+40 48 43.1190	023.315840	+40.811978	0.299	0.299	20.529	0.500	18.205	0.500	18.302	0.400	16.662	0.500	1998.8300	1998.8300	0.0	0.0	0.0
2	4.718	01 33 15.64562	+40 48 43.4559	023.315190	+40.812071	0.071	0.060	15.995	0.300	14.836	0.300	15.064	0.400	14.126	0.500	1990.4300	1990.4300	-27.5	4.1	5.1	3.9
3	8.339	01 33 16.31596	+40 48 45.5978	023.317983	+40.812666	0.087	0.087	19.554	0.300	17.432	0.300	17.591	0.400	16.057	0.500	1983.4000	1983.4000	13.7	4.6	1.0	4.6
4	8.834	01 33 16.39996	+40 48 45.3742	023.318333	+40.812604	0.103	0.103	20.220	0.400	16.150	0.400	14.717	0.400	12.582	0.500	1979.0700	1979.0700	270.0	4.9	-20.3	4.9

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