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	2.529	17 24 54.68952	+25 52 45.7716	1125-08238048	261.227873	+25.879381			15.9	14.4	1951.506
2	7.100	17 24 54.67872	+25 52 55.1820	1125-08238047	261.227828	+25.881995			20.2	16.6	1951.506

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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	2.699	17 24 54.70416	+25 52 45.6708	EO0263-0062689	261.227934	+25.879353	14.32		1	20.32	15.7	0.27	17.13		1	19.99	16.2	2.81
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%202.699&%3cFONT%20COLOR=%27#CD5B45%27>17%2024%2054.70416&%3cFONT%20COLOR=%27#CD5B45%27>%2b25%2052%2045.6708&EO0263-0062689&261.227934&%2b25.879353&14.32&%20&%201&%20%2020.32&%20%2015.7&%200.27&17.13&%20&%201&%20%2019.99&%20%2016.2&%20%202.81&%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	2.890	17 24 54.68088	+25 52 45.3504	N101223317341	261.227837	+25.879264	1990.322			16.40	0.41	3	6.42	0.24
2	3.116	17 24 54.67128	+25 52 45.0840	N101223314015	261.227797	+25.879190	1996.239	13.98	0.41	16.29	0.41	3	6.89	0.24
3	9.980	17 24 55.28136	+25 52 52.6152	N101223317343	261.230339	+25.881282	1990.322			18.98	0.42	3	14.54	0.80

%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 [****ClosingBrace(s)Inserted****]
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Imag

%22>%5cFONT SIZE=-1mag 1 2.88517 24 54.67944+25 52 45.35041158-0256933261.227831+25.879264 861971976.6 0 0516.6714.3715.3813.8113.98 2 4.23717 24 54.67800+25 52 52.29121158-0256932261.227825+25.8811923774991964.4 2 -56320.9816.6120.62     3 5.81017 24 55.05144+25 52 48.12241158-0256937261.229381+25.8800349999991964.4 0 0320.5713.7619.82     4 7.23717 24 55.12536+25 52 50.58121158-0256939261.229689+25.8807175475431978.4 0 0320.76  19.8219.09   %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	2.885	17 24 54.679344	+25 52 45.35004	1158-0262063	YM	261.2278306	+25.8792639	B	0.0	0.0	0.0	0.0	17.310	Y	16.100	Y	13.810	B	14.726	14.012	13.531
2	4.236	17 24 54.678000	+25 52 52.29012	1158-0262062	..	261.2278250	+25.8811917	B	2.0	9.0	-56.0	12.0	20.620	B			16.610	e
3	5.808	17 24 55.051344	+25 52 48.11988	1158-0262067	..	261.2293806	+25.8800333	B	0.0	0.0	0.0	0.0	19.820	B			13.760	e
4	7.236	17 24 55.125336	+25 52 50.58012	1158-0262069	..	261.2296889	+25.8807167	B	0.0	0.0	0.0	0.0	19.820	B			19.090	B

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Full	_r arcsec	_RAJ2000 [****ClosingBrace(s)Inserted****]
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%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_RAJ2000

%20

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

CMC14

f_

RAICRS
deg

DEICRS
deg

r'mag
mag

Nt

Jmag
mag

Hmag
mag

Ksmag
mag

1 2.99117 24 54.66288+25 52 45.1884172454.6+255245  261.227762+25.87921916.561 314.72614.01213.531 %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"	_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	2.887	17 24 54.68088	+25 52 45.3540	N3HR017341	261.227837	+25.879265	1990.322		16.40			3	6.42	0.24
2	3.117	17 24 54.67152	+25 52 45.0840	N3HR014015	261.227798	+25.879190	1996.239	13.98	16.29	16.17	14.21	3	6.89	0.24
3	9.984	17 24 55.28160	+25 52 52.6188	N3HR017343	261.230340	+25.881283	1990.322		18.98			3	14.54	0.80

%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	[****ClosingBrace(s)Inserted****]
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mag&%">\BegDIVclass='sort-down ' </A>decNo

fl

1 3.04717 24 54.65856+25 52 45.1200261.227744+25.879200 -7.5 -14.614.72613.53116.6715.3814.3713.8113.98 6 0 2 4.02617 24 54.68112+25 52 52.0680261.227838+25.881130 4.2 -67.5    20.9820.6216.61     3 0 3 6.45517 24 55.08504+25 52 49.6884261.229521+25.880469 43.9 23.5    20.5719.8213.76     3 1 4 7.08117 24 55.11096+25 52 50.6568261.229629+25.880738 1.3 -6.7    20.7619.82  19.09   3 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	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	2.966	17 24 54.66351	+25 52 45.2148	261.227765	+25.879226	0.004	0.004	16.289	0.300	13.981	0.300	16.010	0.080	14.773	0.110	2000.2600	2000.2600	-7.5	3.7	-14.6	3.7
2	7.080	17 24 55.11091	+25 52 50.6573	261.229629	+25.880738	0.133	0.133	19.820	0.400	19.090	0.400	19.257	0.400	18.623	0.500	1978.4500	1978.4500	1.3	7.0	-6.7	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/%2b50deg%3cP%3e%0a