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	0.713	17 37 41.39472	+12 26 22.3512	0975-09465796	264.422478	+12.439542			18.9	18.0	1956.204
2	2.900	17 37 41.28480	+12 26 19.9032	0975-09465748	264.422020	+12.438862			17.4	16.6	1956.204

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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	3.160	17 37 41.27472	+12 26 19.6800	EO1580-0215020	264.421978	+12.438800	17.21		1	16.23	16.4	0.34	18.48		1	13.68	16.3	1.27
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%203.160&%3cFONT%20COLOR=%27#CD5B45%27>17%2037%2041.27472&%3cFONT%20COLOR=%27#CD5B45%27>%2b12%2026%2019.6800&EO1580-0215020&264.421978&%2b12.438800&17.21&%20&%201&%20%2016.23&%20%2016.4&%200.34&18.48&%20&%201&%20%2013.68&%20%2016.3&%20%201.27&%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	3.318	17 37 41.27688	+12 26 19.4280	N100130012521	264.421987	+12.438730	1992.332	15.70	0.41	15.83	0.42	3	7.16	0.46

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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	3.200	17 37 41.27400	+12 26 19.6332	1024-0350898	264.421975	+12.438787	197	215	1977.7	0	0	5	17.38	16.34	15.53	15.49	15.03
2	4.919	17 37 41.64336	+12 26 25.6704	1024-0350905	264.423514	+12.440464	623	228	1967.6	86	78	3	19.02	17.89	18.74
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">

%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%204.919&%3cFONT%20COLOR=%27#CD5B45%27>17%2037%2041.64336&%3cFONT%20COLOR=%27#CD5B45%27>%2b12%2026%2025.6704&1024-0350905&264.423514&%2b12.440464&623&228&1967.6&%20%20%20%2086&%20%20%20%2078&3&19.02&17.89&18.74&%20&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ664178583b4776&-out.add=.&-source=I/284/out&USNO-B1.0===1024-0350904&-out.orig=o' class='full'3 5.76617 37 41.61600+12 26 26.95201024-0350904264.423400+12.4408202099691991.4 0 02    20.5919.16   4 6.41917 37 41.20272+12 26 16.38241024-0350895264.421678+12.4378849993191974.8 0 02  19.26    18.54 %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	3.202	17 37 41.274000	+12 26 19.62996	1024-0354456	YM	264.4219750	+12.4387861	B	0.0	0.0	0.0	0.0	18.070	Y			15.490	B	16.053	15.372	15.224
2	4.918	17 37 41.643336	+12 26 25.67004	1024-0354463	..	264.4235139	+12.4404639	B	86.0	17.0	78.0	6.0	18.740	B			17.890	e
3	5.764	17 37 41.616000	+12 26 26.94984	1024-0354462	..	264.4234000	+12.4408194	B	0.0	0.0	0.0	0.0	20.590	B			19.160	B
4	6.422	17 37 41.202672	+12 26 16.37988	1024-0354453	..	264.4216778	+12.4378833	B	0.0	0.0	0.0	0.0					19.260	e

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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 3.31317 37 41.27712+12 26 19.4316N38W012521264.421988+12.4387311992.33215.7015.8317.4115.473 7.16 0.46 %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	3.203	17 37 41.28816	+12 26 19.4352	264.422034	+12.438732	11.5	-11.1	16.053	15.224	17.38	15.53	16.34	15.49	15.03	6	0
2	4.837	17 37 41.64696	+12 26 25.5192	264.423529	+12.440422	88.6	70.1			19.02	18.74	17.89			3	0
3	6.113	17 37 41.21832	+12 26 16.6020	264.421743	+12.437945	28.0	2.3					19.26		18.54	2	0

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

Fmag

%20

%22>%5cFONT SIZE=-1magBjmag
mag

Vmag
mag

Nmag
mag

Jmag
mag

e_
mag

Hmag
mag

e_
mag

Kmag
mag

e_
mag

2Mkey

Bmag
mag

Rmag
mag

Fld

dT
yr

fg

fs

M

1 3.22817 37 41.29200+12 26 19.3559XPM 204-0403554264.422050+12.438710 -33.69 -64.57 -33.44 -64.5515.69815.83217.40815.47416.053 0.11515.373 0.13315.224 0.176106500965518.918.0 50944.11571500M %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	3.203	17 37 41.28811	+12 26 19.4349	264.422034	+12.438732	0.081	0.081	15.832	0.300	15.698	0.300	15.721	0.400	15.535	0.500	1986.2000	1986.2000	11.5	4.6	-11.1	4.6
2	4.837	17 37 41.64694	+12 26 25.5190	264.423529	+12.440422	0.133	0.133	18.740	0.400	17.890	0.400	18.078	0.400	17.357	0.500	1967.6500	1967.6500	88.6	8.2	70.1	8.2

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