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	1.186	11 55 47.76144	+15 35 33.1800	1050-06612013	178.949006	+15.592550			17.8	18.5	1950.298
2	2.155	11 55 47.80344	+15 35 32.3232	1050-06612016	178.949181	+15.592312			18.7	18.9	1955.309

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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	1.491	11 55 47.78088	+15 35 33.0612	EO1406-0155798	178.949087	+15.592517	18.28		1	16.48	9.9	0.40	20.15		1	3.48	6.4	1.88
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%201.491&%3cFONT%20COLOR=%27#CD5B45%27>11%2055%2047.78088&%3cFONT%20COLOR=%27#CD5B45%27>%2b15%2035%2033.0612&EO1406-0155798&178.949087&%2b15.592517&18.28&%20&%201&%20%2016.48&%20%20%209.9&%200.40&20.15&%20&%201&%20%20%203.48&%20%20%206.4&%20%201.88&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66440ec9388cdd&-out.add=.&-source=I/267/out&APM-ID===EO0089-0178044&-out.orig=o' class='full'2 1.91011 55 47.80680+15 35 32.8704EO0089-0178044178.949195+15.59246418.41   1 7.55 7.8 0.1619.64   1 15.33 10.6 1.23   %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20construction%20of%20the%20%0a%3cB%3eGSC-II%20%0ais%20still%20in%20progress:%20this%0aversion%20has%20no%20proper%20motions,%20and%20the%20magnitude%20limits%20are%2018.5%20in%20F%20%28red%29%0aand%2019.5%20in%20J%20%28blue%29.%20The%20data%20are%20%3cB%3e%3cFONT%20COLOR=%27#0000CD%27>copyrighted,%20check%20%0athe%20%3cB%3edata%20use%20Policy.%0a%3cP%3e%0a

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	1.945	11 55 47.80392	+15 35 32.7120	N20012101337	178.949183	+15.592420	1989.266	17.91	0.43	17.79	0.42	3	4.29	0.27

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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	0.275	11 55 47.67216	+15 35 33.8424	1055-0207198	178.948634	+15.592734	788	273	1973.2	-34	40	4	19.68	19.26	20.33		18.90
2	1.465	11 55 47.77800	+15 35 33.0324	1055-0207199	178.949075	+15.592509	69	150	1981.7	0	0	4		18.74	17.74	17.66	18.60
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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	0.275	11 55 47.671992	+15 35 33.83988	1055-0210901	..	178.9486333	+15.5927333	B	-34.0	24.0	40.0	8.0	20.330	B			19.260	e
2	1.466	11 55 47.778000	+15 35 33.02988	1055-0210902	..	178.9490750	+15.5925083	B	0.0	0.0	0.0	0.0	17.740	B			17.660	B

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

%22>%5cFONT SIZE=-1yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 1.94811 55 47.80416+15 35 32.7120N6EC001337178.949184+15.5924201989.26617.9117.7918.8618.213 4.29 0.27 %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	0.499	11 55 47.65200	+15 35 33.7128	178.948550	+15.592698	-43.4	28.2			19.68	20.33	19.26		18.90	4	0
2	1.601	11 55 47.78400	+15 35 32.9028	178.949100	+15.592473	0.6	-13.3				17.74	18.74	17.66	18.60	4	0

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

%20

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

magGrvs
mag

e_
mag

alphaEpoch
yr

deltaEpoch
yr

pmRA
mas/yr

e_
(...)

pmDE
mas/yr

e_
(...)

1 0.49911 55 47.65200+15 35 33.7132178.948550+15.592698 0.115 0.11520.330 0.40019.260 0.40019.479 0.40018.603 0.5001973.23001973.2300 -43.4 6.4 28.2 6.4 2 1.60011 55 47.78400+15 35 32.9033178.949100+15.592473 0.115 0.11517.786 0.30017.912 0.30017.859 0.40017.875 0.5001981.72001981.7200 0.6 7.5 -13.3 7.5 %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"	RAICRS deg	e_ mas	DEICRS deg	e_ mas	ID	Type	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Nobs	Dt yr	Rmag mag	Bmag mag	Nmag mag	Vmag mag	Jmag mag	Hmag mag	Kmag mag
1	1.942	11 55 47.808924	+15 35 32.86214	178.9492038	208.00	+15.5924617	289.00	57444+0001337	4	9.5	6.1	5.7	8.4	8	41.860	17.912	17.786	18.207	18.861

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