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	2.532	15 32 02.25216	+68 14 37.5900	1575-03546402	233.009384	+68.243775			18.0	16.0	1955.372
2	7.844	15 32 01.23744	+68 14 29.0220	1575-03546359	233.005156	+68.241395			18.4	18.2	1955.372

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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	2.014	15 32 02.21784	+68 14 34.8504	N11333103748	233.009241	+68.243014	1991.373			15.81	0.41	3	7.47	0.04
2	7.771	15 32 02.46408	+68 14 43.0512	N11333108350	233.010267	+68.245292	1991.436	15.16	0.39			3	6.55	0.22

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>	\BegDIVclass='sort-down ' </A>
dec 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	1.229	15 32 02.13072	+68 14 36.0132	1582-0180645	233.008878	+68.243337	557	291	1967.3	-10	-38	3	17.38	15.84			17.19
2	3.287	15 32 01.48680	+68 14 33.6228	1582-0180641	233.006195	+68.242673	680	860	1973.3	0	0	2	17.98				16.24
3	6.639	15 32 02.61144	+68 14 41.2908	1582-0180647	233.010881	+68.244803	999	999	1967.3	42	-440	3	16.34	16.43		14.33
4	7.256	15 32 01.59816	+68 14 42.9612	1582-0180642	233.006659	+68.245267	999	136	1979.3	-44	132	3	14.52			8.85	15.90

Note: The Naval Observatory Merged Astrometric Dataset (NOMAD) contains astrometric and photometric data for over 1 billion stars derived from the Hipparcos (I/239), Tycho-2 (I/259), UCAC2 (I/289), and USNO-B1.0 (I/284) catalogs for astrometry and optical photometry, supplemented by 2MASS (II/246) near-infrared photometry.
An efficient remote query program findnomad1 is available in the cdsclient package, for Unix/Linux platforms

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	1.228	15 32 02.130672	+68 14 36.00996	1582-0182333	..	233.0088778	+68.2433361	B	-10.0	15.0	-38.0	7.0	17.380	o			15.840	e
2	3.290	15 32 01.486656	+68 14 33.61992	1582-0182329	..	233.0061944	+68.2426722	B	0.0	0.0	0.0	0.0	17.980	o
3	6.638	15 32 02.611344	+68 14 41.29008	1582-0182335	..	233.0108806	+68.2448028	B	42.0	30.0	-440.0	39.0	16.340	o			14.330	B
4	7.255	15 32 01.597992	+68 14 42.96012	1582-0182330	..	233.0066583	+68.2452667	B	-44.0	143.0	132.0	5.1	14.520	o			8.850	B

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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 2.01415 32 02.21808+68 14 34.8540N4QC003748233.009242+68.2430151991.373  15.81    3 7.47 0.04 2 7.77515 32 02.46432+68 14 43.0548N4QC014724233.010268+68.2452931991.43615.16      3 6.55 0.22 %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	1.308	15 32 02.14344	+68 14 35.7360	233.008931	+68.243260	-11.2	-38.7			17.38		15.84		17.19	3	0
2	3.492	15 32 01.34160	+68 14 34.4364	233.005590	+68.242899	-24.2	25.7			17.98				16.24	2	0
3	6.432	15 32 02.63328	+68 14 40.9380	233.010972	+68.244705	45.4	-449.9			16.34		16.43	14.33		3	0
4	7.715	15 32 01.27344	+68 14 42.7704	233.005306	+68.245214	-90.6	135.2			14.52				15.90	3	1

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

magBJ

%20

%22>%5cFONT SIZE=-1mage_
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 1.30815 32 02.14348+68 14 35.7361233.008931+68.243260 0.133 0.13315.811 0.30015.840 0.40015.815 0.40015.757 0.5001967.38001967.3800 -11.2 7.8 -38.7 7.8 2 6.43215 32 02.63323+68 14 40.9379233.010972+68.244705 0.133 0.13316.340 0.40015.156 0.30015.387 0.40014.432 0.5001967.39001967.3900 45.4 7.8 -449.9 7.8 %0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	Class	Gmag mag	OMag mag	Bjmag mag	Fpgmag mag	Epgmag mag	Npgmag mag	Umag mag	Bmag mag	Vmag mag	umag mag	gmag mag	rmag mag	imag mag	zmag mag	ymag mag	Jmag mag	Hmag mag	Ksmag mag	Zmag mag	Ymag mag	W1mag mag	W2mag mag	W3mag mag	W4mag mag	FUVmag mag	NUVmag mag	a pix	e pix	PA pix
1	2.119	15 32 02.2760616000	+68 14 36.511656000	N4QC003748	233.00948359000	+68.24347546000	111333103748	2013.740	3			15.811300								23.783	21.386	21.626	21.211													7.466	0.036	82.6
[****ClosingBrace(s)Inserted****]
1	2.119	15 32 02.2760616000	+68 14 36.511656000	N4QC003748	233.00948359000	+68.24347546000	111333103748	2013.740	3			15.811300								23.783	21.386	21.626	21.211													7.466	0.036	82.6

%22>\Ahref='VizieR-5?-ref=VIZ6621c84f15379d&-out.add=.&-source=I%2f353%2fgsc242&-c=233.01026916504%20%2b68.24529266357,eq=ICRS,rs=2&-out.orig=o' class='full'2 7.77415 32 02.4645996094+68 14 43.053588867N4QC014724233.01026916504+68.24529266357 11133310147241991.4400      15.156700                                             6.552 0.216 89.4 %0a%0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	IRAS	RA1950 "h:m:s"	DE1950 "d:m:s"	Fnu12 Jy	q_	Fnu25 Jy	q_	Fnu60 Jy	q_	Fnu100 Jy	q_	nID
1	8.9	15 32 00.421	+68 14 32.61	F15316+6824	15 31 40.8	+68 24 36	1.23e-01	3	1.67e-01	3	1.33e+00	3	2.80e+00	2	5

%0a%0a