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	2.239	10 47 23.86200	-41 59 49.3404	0450-11975912	161.849425	-41.997039			18.7	17.9	1980.739
2	16.512	10 47 22.58472	-41 59 50.6220	0450-11975304	161.844103	-41.997395			19.2	17.8	1980.739
3	23.501	10 47 24.17952	-41 59 26.0232	0450-11976059	161.850748	-41.990562			18.6	17.2	1980.739

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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	23.793	10 47 24.15360	-41 59 25.7172	S13032233750	161.850640	-41.990477	1993.463	17.73	0.42	19.08	0.42	3	3.67	0.29

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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	2.243	10 47 23.86272	-41 59 49.2108	0480-0265791	161.849428	-41.997003	48	102	1984.9	0	0	3		19.99	19.05	18.89
2	16.336	10 47 22.60008	-41 59 50.5428	0480-0265777	161.844167	-41.997373	91	60	1986.7	0	0	4		18.48	19.68	18.58	18.10
3	23.515	10 47 24.18408	-41 59 26.0124	0480-0265793	161.850767	-41.990559	31	118	1986.7	0	0	4		17.52	18.86	17.62	17.35

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	2.244	10 47 23.862672	-41 59 49.21008	0480-0274729	..	161.8494278	-41.9970028	B	0.0	0.0	0.0	0.0	19.050	B			18.890	B
2	16.336	10 47 22.600008	-41 59 50.53992	0480-0274714	YM	161.8441667	-41.9973722	B	0.0	0.0	0.0	0.0	18.120	Y			18.580	B	16.620	17.771	16.771
3	23.517	10 47 24.184008	-41 59 26.00988	0480-0274731	.M	161.8507667	-41.9905583	B	0.0	0.0	0.0	0.0	18.860	B			17.620	B	16.978	16.245	15.695

%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 [****ClosingBrace(s)Inserted****]
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GSC2.3

%22>RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 2.41510 47 23.85024-41 59 48.9984S5PN003635161.849376-41.9969441993.46318.8719.52    0 2.56 0.23 216.42110 47 22.59240-41 59 50.5392S5PN003632161.844135-41.9973721993.46318.5820.01  18.063 2.52 0.07 321.08710 47 24.43608-42 00 10.1592S5PN038089161.851817-42.0028221975.365  21.57    0 1.63 0.06 423.80010 47 24.15360-41 59 25.7100S5PN003750161.850640-41.9904751993.46317.7319.08  17.353 3.67 0.29 %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	2.368	10 47 23.85456	-41 59 48.9984	161.849394	-41.996944	-11.8	9.5				19.05	19.99	18.89		3	0
2	16.663	10 47 22.56984	-41 59 50.3916	161.844041	-41.997331	-19.0	5.8	16.621	16.772		19.68	18.48	18.58	18.10	5	0
3	23.775	10 47 24.13920	-41 59 25.7280	161.850580	-41.990480	-31.7	11.7	16.978	15.695		18.86	17.52	17.62	17.35	5	0

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

Fmag

%20

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

Vmag
mag

Nmag
mag

Jmag
mag

e_
mag

Hmag
mag

e_
mag

Kmag
mag

e_
mag

2Mkey

Bmag
mag

Rmag
mag

Fld

dT
yr

fg

fs

M

117.23310 47 22.51825-41 59 50.3123XPM 096-0424289161.843826-41.997309 -39.91 11.09 -41.33 11.2118.57820.006  18.05916.621 0.14817.772  16.772   34678501419.217.8 31818.52105100M 223.84910 47 24.11282-41 59 25.6454XPM 096-0424319161.850470-41.990457 -38.61 15.80 -40.03 15.9217.72719.076  17.35416.978 0.18616.245 0.18915.695 0.223 36468156618.617.2 31818.52361900M %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	2.369	10 47 23.85452	-41 59 48.9982	161.849394	-41.996944	0.133	0.133	19.523	0.300	18.868	0.300	19.020	0.400	18.441	0.500	1984.9800	1984.9800	-11.8	17.9	9.5	17.9
2	16.663	10 47 22.56987	-41 59 50.3921	161.844041	-41.997331	0.110	0.110	20.006	0.300	18.578	0.300	18.820	0.400	17.701	0.500	1987.8800	1987.8800	-19.0	14.3	5.8	14.3
3	23.776	10 47 24.13919	-41 59 25.7278	161.850580	-41.990480	0.100	0.100	19.076	0.300	17.727	0.300	17.968	0.400	16.901	0.500	1989.7500	1989.7500	-31.7	12.2	11.7	12.2

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