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	9.552	17 08 58.47000	+21 53 05.5824	1050-08402088	257.243625	+21.884884			17.3	15.5	1955.246

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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	1.566	17 08 59.06352	+21 53 09.4632	EO1377-0395424	257.246098	+21.885962	11.69		2	24.29	35.2	0.59	13.98		2	45.07	28.0	2.29

%0a%0a%5b%2a%2a%2a%2aClosingBrace%28s%29Inserted%2a%2a%2a%2a%5d">">\scripttype='text/javascript' ts_init('!ext/apm.exe_2');

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	0.236	17 08 59.14344	+21 53 08.3436	N1032101915	257.246431	+21.885651	1996.446	14.03	0.43	15.05	0.41	0	7.63	0.21
2	7.296	17 08 59.46120	+21 53 13.8552	N1032101916	257.247755	+21.887182	1996.446	15.13	0.43	16.74	0.41	3	7.14	0.20
3	9.959	17 08 58.44144	+21 53 05.4924	N1032101917	257.243506	+21.884859	1996.446	15.68	0.43	17.24	0.41	3	5.38	0.10

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

%22>%5cFONT SIZE=-1mag 1 2.01417 08 59.20608+21 53 09.91321118-0309461257.246692+21.8860873283111978.7 0 0515.1212.8213.0912.0812.91 2 3.81617 08 59.29752+21 53 11.22001118-0309464257.247073+21.8864503805271984.1 0 0416.76  13.4412.2013.77 3 9.00717 08 58.50744+21 53 05.74081118-0309457257.243781+21.8849283072711978.7 0 0517.8215.4715.6314.1315.03 %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	2.011	17 08 59.206008	+21 53 09.90996	1118-0313287	YM	257.2466917	+21.8860861	B	0.0	0.0	0.0	0.0	15.950	Y	15.890	Y	12.080	B	14.733	13.923	13.167
2	3.814	17 08 59.297328	+21 53 11.22000	1118-0313290	..	257.2470722	+21.8864500	B	0.0	0.0	0.0	0.0	13.440	B			12.200	B
3	6.702	17 08 59.418000	+21 53 13.57008	1118-0313293	YM	257.2475750	+21.8871028	Y	22.9	9.0	21.9	9.0	17.570	Y	17.170	Y			15.372	14.717	14.310
4	9.009	17 08 58.507344	+21 53 05.74008	1118-0313283	YM	257.2437806	+21.8849278	B	0.0	0.0	0.0	0.0	17.970	Y	17.760	Y	14.130	B	15.630	15.006	14.593

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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 0.32317 08 59.15160+21 53 08.0808170859.1+215308  257.246465+21.88557815.997 414.73313.92313.168 %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	0.241	17 08 59.14368	+21 53 08.3472	N3V5000915	257.246432	+21.885652	1996.446	14.03	15.05	16.02	13.72	3	7.63	0.21
2	7.298	17 08 59.46144	+21 53 13.8552	N3V5000916	257.247756	+21.887182	1996.446	15.13	16.74	15.61	14.70	3	7.14	0.20
3	9.955	17 08 58.44168	+21 53 05.4960	N3V5000917	257.243507	+21.884860	1996.446	15.68	17.24	16.97	15.48	3	5.38	0.10

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 "h:m:s"	DEJ2000 "d:m:s"	e_RAJ2000 mas	e_DEJ2000 mas	Nr	Rmag	z	LQAC	oRA mas	oDE mas
1	0.102	17 08 59.137200	+21 53 08.18300	17 08 59.1372	+21 53 08.183	164.3	159.0	8	15.00	0.072	LQAC
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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	0.445	17 08 59.14920	+21 53 08.5560	257.246455	+21.885710	-13.3	-33.2	14.733	13.168	15.12	13.09	12.82	12.08	12.91	6	1
2	3.631	17 08 59.27208	+21 53 11.2452	257.246967	+21.886457	-10.0	-7.8			16.76	13.44		12.20	13.77	4	0

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