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	2.837	15 54 38.09688	+24 41 24.2016	1125-07427399	238.658737	+24.690056			19.0	17.9	1950.367

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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	2.323	15 54 38.11272	+24 41 24.8100	EO1119-0072949	238.658803	+24.690225	17.72		1	2.80	7.2	0.13	19.95		-1	1.53	7.1	2.23
2	3.153	15 54 38.11944	+24 41 23.9604	EO0113-0087204	238.658831	+24.689989	17.57		-1	0.84	8.4	0.07	19.66		-1	1.75	7.1	2.09
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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	2.863	15 54 38.10552	+24 41 24.2052	N1330021786	238.658773	+24.690057	1992.487	17.91	0.42			3	3.16	0.12

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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	1.987	15 54 38.06736	+24 41 24.9900	1146-0232907	238.658614	+24.690275	999	999	1973.9	0	0	2	20.68				18.99
2	2.636	15 54 38.09736	+24 41 24.4104	1146-0232908	238.658739	+24.690114	59	61	1977.0	0	0	5	19.90	18.01	19.32	17.84	17.60
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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	1.987	15 54 38.067336	+24 41 24.99000	1146-0237551	YM	238.6586139	+24.6902750	B	0.0	0.0	0.0	0.0	20.680	o	17.970	Y			16.771	15.798	15.787
2	2.636	15 54 38.097336	+24 41 24.41004	1146-0237552	..	238.6587389	+24.6901139	B	0.0	0.0	0.0	0.0	19.320	B			17.840	B

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.3	RAJ2000 deg	DEJ2000 deg	Epoch yr	[****ClosingBrace(s)Inserted****]
">

yr&%">\BegDIVclass='sort-down ' </A>decFmag
magjmag
mag

Vmag
magNmag
magClass

a
pixe

1 2.86115 54 38.10576+24 41 24.2088N64P000786238.658774+24.6900581992.48717.9119.5818.5517.483 3.16 0.12 %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	1.870	15 54 38.03040	+24 41 25.1052	238.658460	+24.690307	-14.3	-1.2	16.772	15.787	20.68				18.99	3	1
2	2.725	15 54 38.08464	+24 41 24.2808	238.658686	+24.690078	-9.6	-4.8	16.772	15.787	19.90	19.32	18.01	17.84	17.60	6	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	Bjmag mag	Vmag [****ClosingBrace(s)Inserted****]
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Vmag

%20

%22>%5cFONT SIZE=-1magNmag
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 2.62015 54 38.08514+24 41 24.3886XPM 229-0346822238.658688+24.690108 -0.39 10.17 -0.23 10.5817.90919.58118.55317.47616.772 0.18615.799 0.15615.787 0.246101345343219.017.9 38649.83618200M %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	2.743	15 54 38.09166	+24 41 24.2817	238.658715	+24.690078	0.008	0.007	19.581	0.300	17.909	0.300	18.280	0.081	17.113	0.111	2003.4700	2003.4700	-9.6	4.9	-4.8	4.9

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