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	1.097	13 52 18.88608	+01 12 58.3128	0900-07511271	208.078692	+01.216198			19.5	17.5	1952.078
2	5.189	13 52 19.16016	+01 12 54.4608	0900-07511301	208.079834	+01.215128			18.6	18.4	1952.078

%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	1.529	13 52 18.94200	+01 12 57.1320	EO0465-0047498	208.078925	+01.215870	18.04		2	15.09	12.4	0.54	19.13		1	9.32	15.6	1.09	*
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%201.529&%3cFONT%20COLOR=%27#CD5B45%27>13%2052%2018.94200&%3cFONT%20COLOR=%27#CD5B45%27>%2b01%2012%2057.1320&EO0465-0047498&208.078925&%2b01.215870&18.04&%20&%202&%20%2015.09&%20%2012.4&%200.54&19.13&%20&%201&%20%20%209.32&%20%2015.6&%20%201.09&%2a%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	0.770	13 52 18.90528	+01 12 58.5036	N12123204648	208.078772	+01.216251	1994.425	18.43	0.42			0	3.03	0.20
2	5.317	13 52 19.17792	+01 12 54.5040	N12123204647	208.079908	+01.215140	1997.349	18.25	0.46	19.00	0.41	3	3.41	0.35

%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	0.947	13 52 18.91152	+01 12 57.9708	0912-0224952	208.078798	+01.216103	364	213	1982.7	0	0	4	20.07		19.04	17.84	17.42
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.947&%3cFONT%20COLOR=%27#CD5B45%27>13%2052%2018.91152&%3cFONT%20COLOR=%27#CD5B45%27>%2b01%2012%2057.9708&0912-0224952&208.078798&%2b01.216103&364&213&1982.7&%20%20%20%20%200&%20%20%20%20%200&4&20.07&%20&19.04&17.84&17.42%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ664119a85d337&-out.add=.&-source=I/284/out&USNO-B1.0===0912-0224953&-out.orig=o' class='full'2 1.35513 52 18.97680+01 12 57.33000912-0224953208.079070+01.2159259389991992.0 0 03    18.2617.1718.06 3 4.33413 52 19.11000+01 12 54.98280912-0224954208.079625+01.2152734191481976.6 0 0518.7117.7218.1618.3618.09 4 5.33413 52 19.19208+01 12 54.66240912-0224955208.079967+01.215184 883761973.2 0 0419.1118.77  19.0018.35 %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	0.950	13 52 18.911328	+01 12 57.97008	0912-0229127	..	208.0787972	+01.2161028	B	0.0	0.0	0.0	0.0	19.040	B			17.840	B
2	1.355	13 52 18.976656	+01 12 57.33000	0912-0229128	..	208.0790694	+01.2159250	B	0.0	0.0	0.0	0.0	18.260	B			17.170	B
3	4.337	13 52 19.110000	+01 12 54.97992	0912-0229129	Y.	208.0796250	+01.2152722	B	0.0	0.0	0.0	0.0	18.350	Y			18.360	B
4	5.335	13 52 19.192008	+01 12 54.65988	0912-0229130	..	208.0799667	+01.2151833	B	0.0	0.0	0.0	0.0	19.110	o			19.000	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 1.13813 52 18.87984+01 12 58.6656N52W004648208.078666+01.2162961997.34918.6019.94  17.453 2.35 0.19 2 5.32013 52 19.17816+01 12 54.5040N52W004647208.079909+01.2151401997.34918.2519.00  18.473 3.41 0.35 %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	1.083	13 52 18.91032	+01 12 57.8052	208.078793	+01.216057	7.4	-12.5			20.07	19.04		17.84	17.42	4	0
2	4.227	13 52 19.10616	+01 12 55.0728	208.079609	+01.215298	5.5	1.8			18.71	18.16	17.72	18.36	18.09	5	1
3	5.106	13 52 19.18056	+01 12 54.8136	208.079919	+01.215226	-9.9	-1.8			19.11		18.77	19.00	18.35	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 mag	e_ mag	[****ClosingBrace(s)Inserted****]
">

mag&%">\BegDIVclass='sort-down ' </A>decmagRF
mage_
magmagG
mage_
magmagGrvs
mage_
magalphaEpoch
yrdeltaEpoch
yrpmRA
mas/yre_
(...)pmDE
mas/yre_
(...) 1 0.95013 52 18.89282+01 12 58.5341208.078720+01.216259 0.013 0.01119.936 0.30018.600 0.30018.919 0.09117.841 0.1182000.31002000.3100 -1.9 17.4 18.4 17.9 2 1.08313 52 18.91033+01 12 57.8050208.078793+01.216057 0.115 0.11519.040 0.40017.840 0.40018.072 0.40017.105 0.5001982.76001982.7600 7.4 6.4 -12.5 6.4 3 4.22713 52 19.10614+01 12 55.0730208.079609+01.215298 0.103 0.10318.160 0.40018.360 0.40018.285 0.40018.358 0.5001976.64001976.6400 5.5 5.1 1.8 5.1 4 4.86313 52 19.14093+01 12 54.6554208.079754+01.215182 0.033 0.02019.001 0.30018.253 0.30018.398 0.08417.632 0.1132000.31002000.3100 -9.9 5.4 -1.8 5.4 %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	0.841	13 52 18.903608	+01 12 58.33521	208.0787650	144.00	+01.2162042	174.00	55736+0004648	4	-9.3	8.9	18.8	10.8	11	46.224	18.600	19.936	17.453
2	4.955	13 52 19.152946	+01 12 54.67217	208.0798039	134.00	+01.2151867	146.00	55736+0004647	4	19.8	7.5	-12.8	8.1	10	45.268	18.253	19.001	18.466

%0a%0a%0a