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	5.613	15 07 55.12272	+54 45 45.4428	1425-08240864	226.979678	+54.762623			17.2	16.8	1954.487

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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	4.057	15 07 55.42512	+54 45 36.1404	N11220006300	226.980938	+54.760039	1990.373			15.96	0.32	3	7.05	0.17
2	5.612	15 07 55.03176	+54 45 45.1836	N1122000652	226.979299	+54.762551	1991.439	12.77	0.35	15.90	0.10	0	10.31	0.05
3	9.329	15 07 55.62672	+54 45 31.1652	N11220009151	226.981778	+54.758657	1994.414			13.22	0.10	0	14.05	0.08

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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	3.747	15 07 55.23336	+54 45 36.2700	1447-0238635	226.980139	+54.760075	999	595	1992.8	0	0	2			14.52		17.92
2	4.890	15 07 55.08888	+54 45 44.6004	1447-0238633	226.979537	+54.762389	467	999	1980.4	168	48	3	19.17		11.33		15.98
3	5.572	15 07 54.91008	+54 45 44.5608	1447-0238630	226.978792	+54.762378	175	19	1975.4	0	0	2	18.83			14.59
4	5.879	15 07 55.05072	+54 45 45.5328	1447-0238632	226.979378	+54.762648	275	76	1972.9	0	0	4	16.57	15.95		14.86	16.08

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	3.747	15 07 55.233336	+54 45 36.27000	1447-0244814	..	226.9801389	+54.7600750	B	0.0	0.0	0.0	0.0	14.520	B
2	4.890	15 07 55.088664	+54 45 44.60004	1447-0244812	..	226.9795361	+54.7623889	B	168.0	17.0	48.0	71.0	11.330	B
3	5.571	15 07 54.910008	+54 45 44.56008	1447-0244809	..	226.9787917	+54.7623778	B	0.0	0.0	0.0	0.0	18.830	o			14.590	B
4	5.877	15 07 55.050672	+54 45 45.52992	1447-0244811	YM	226.9793778	+54.7626472	B	0.0	0.0	0.0	0.0	16.770	o	16.540	Y	14.860	B	16.129	15.869	15.577

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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 4.05415 07 55.42536+54 45 36.1440N4G0006300226.980939+54.7600401990.373  15.96    3 7.05 0.17 2 5.61515 07 55.03200+54 45 45.1872N4G0000652226.979300+54.7625521991.43912.7715.9014.9215.270 10.31 0.05 3 9.32615 07 55.62696+54 45 31.1688N4G0009151226.981779+54.7586581994.414  13.22    0 14.05 0.08 %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	5.629	15 07 54.87864	+54 45 44.4312	226.978661	+54.762342	-11.8	-0.7			18.83			14.59		2	0
2	6.088	15 07 55.06152	+54 45 45.7848	226.979423	+54.762718	160.4	76.7	16.130	15.578	19.17	11.33			15.98	4	1
3	6.263	15 07 55.02624	+54 45 45.8640	226.979276	+54.762740	-7.3	12.4	16.130	15.578	16.57		15.95	14.86	16.08	5	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 mag	[****ClosingBrace(s)Inserted****]
">

mag&%">\BegDIVclass='sort-down ' </A>decBjmag
magVmag
magNmag
magJmag
mage_
magHmag
mage_
magKmag
mage_
mag2Mkey

Bmag
magRmag
magFld

dT
yrfg

fs

M

1 6.53915 07 55.05026+54 45 46.2276XPM 289-0386096226.979376+54.762841 -9.19 19.63 -8.98 20.0312.76715.89814.91815.26716.130 0.08215.870 0.14315.578   62067290117.216.8 13644.78987500M %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	3.856	15 07 54.90269	+54 45 42.0579	226.978761	+54.761683	0.265	0.353	18.830	0.400	14.590	0.400	14.519	0.080	13.857	0.110	2001.3700	2001.3700	-11.8	7.8	-0.7	7.8
2	4.150	15 07 55.15806	+54 45 35.9811	226.979825	+54.759995	0.045	0.046	22.863	0.235	20.431	0.202	20.257	0.152	18.685	0.170	2001.3700	2001.3700	0.0	0.0	0.0
3	6.263	15 07 55.02628	+54 45 45.8641	226.979276	+54.762740	0.098	0.098	15.898	0.300	12.767	0.300	12.399	0.400	10.431	0.500	1980.1500	1980.1500	-7.3	5.0	12.4	5.0
4	6.322	15 07 55.02714	+54 45 45.9297	226.979280	+54.762758	0.003	0.003	11.330	0.400	17.190	0.200	16.889	0.080	16.267	0.110	2001.3700	2001.3700	160.4	6.2	76.7	6.2
5	6.345	15 07 55.63396	+54 45 34.4430	226.981808	+54.759567	0.045	0.046	21.660	0.208	20.950	0.205	20.758	0.116	19.904	0.139	2001.3700	2001.3700	0.0	0.0	0.0

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