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	1.533	01 51 39.01416	-05 04 47.4024	0825-00425643	027.912559	-05.079834			19.7	18.7	1953.932

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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	1.306	01 51 39.00336	-05 04 47.2404	0849-0016982	027.912514	-05.079789	175	244	1976.6	0	0	5	20.18	19.31	19.60	18.39	18.50

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%22> Full

">  _r
arcsec _RAJ2000
"h:m:s" _DEJ2000
"d:m:s"NOMAD1

YM

RAJ2000
degDEJ2000
degr

pmRA
mas/yre_
(...)pmDE
mas/yre_
(...)Bmag
magr_

Vmag
magr_

Rmag
magr_

Jmag
magHmag
magKmag
magR

1 1.30601 51 39.003336-05 04 47.240040849-0017139..027.9125139-05.0797889B 0.0 0.0 0.0 0.019.600B    18.390B         %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	RAJ2000 deg	DEJ2000 deg	Epoch yr	Fmag mag	jmag mag	Vmag mag	Nmag mag	Class	a pix	e
1	1.077	01 51 38.99760	-05 04 46.9416	S0HF001632	027.912490	-05.079706	1997.893	18.82	20.34		18.21	3	2.75	0.12

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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	0.910	01 51 38.98968	-05 04 46.7940	027.912457	-05.079665	-2.8	4.1			20.18	19.60	19.31		18.50	4	0
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.910&%3cFONT%20COLOR=%27#CD5B45%27>01%2051%2038.98968&%3cFONT%20COLOR=%27#CD5B45%27>-05%2004%2046.7940&027.912457&-05.079665&%20%20%20%20-2.8&%20%20%20%20%204.1&%20&%20&20.18&19.60&19.31&%20&18.50&%204&%200%3cBR%3e">\EndTABLESORT

Note:

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	0.910	01 51 38.98968	-05 04 46.7938	027.912457	-05.079665	0.115	0.115	20.341	0.300	18.816	0.300	19.058	0.400	17.876	0.500	1971.2900	1971.2900	-2.8	6.4	4.1	6.4
2	1.484	01 51 39.01903	-05 04 47.2058	027.912579	-05.079779	0.043	0.028	20.421	0.202	19.463	0.201	19.079	0.087	17.938	0.115	2008.9700	2008.9700	0.0	0.0	0.0

%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 [****ClosingBrace(s)Inserted****]
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pmRA

%20

%22>%5cFONT SIZE=-1mas/yre_
(...)

pmDE
mas/yr

e_
(...)

Nobs

Dt
yr

Rmag
mag

Bmag
mag

Nmag
mag

Vmag
mag

Jmag
mag

Hmag
mag

Kmag
mag

1 1.26001 51 39.010134-05 04 46.97104027.9125422 36.00-05.0797142 121.0033395+00016324 -1.0 1.5 4.6 4.9 843.961 18.816 20.341 18.207         %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	1.416	01 51 39.0223317970	-05 04 47.335888764	S0HF001632	027.91255663000	-05.07978047000	200213031632	2013.396	3		20.222400	20.341400	18.816700		18.207200				21.267	20.879	19.968	19.497	19.480	19.3821	17.276	16.520	15.965			15.777	15.240	12.028	8.534			2.752	0.115	61.1
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1	1.416	01 51 39.0223317970	-05 04 47.335888764	S0HF001632	027.91255663000	-05.07978047000	200213031632	2013.396	3		20.222400	20.341400	18.816700		18.207200				21.267	20.879	19.968	19.497	19.480	19.3821	17.276	16.520	15.965			15.777	15.240	12.028	8.534			2.752	0.115	61.1

%22>\Ahref='VizieR-5?-ref=VIZ6636b7c43f4d1e&-out.add=.&-source=I/353/gsc242&-c=027.91265478000%20-05.07945222000,eq=ICRS,rs=2&-out.orig=o' class='full'2 1.62001 51 39.0371472000-05 04 46.027992000S0HF053469027.91265478000-05.07945222000 20021303534692012.1203                      20.67520.74121.263                               3 6.00601 51 38.7390864000-05 04 41.206116000S0HF024193027.91141286000-05.07811281000 20021303241932014.4983                  23.81423.57622.85521.45521.431                               4 6.26501 51 38.7289557360-05 04 40.994132664S0HF039066027.91137064890-05.07805392574 20021303390662012.0003                               19.504                           5 7.09101 51 38.5729378080-05 04 51.093083208S0HF040710027.91072057420-05.08085918978 20021303407102012.0003                               19.293 18.266 17.532                       %0a%0a%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"	WISE	RAJ2000 deg	DEJ2000 deg	eeMaj arcsec	eeMin arcsec	Im	W1mag mag	e_ mag	W2mag mag	e_ mag	W3mag mag	e_ mag	W4mag mag	e_ mag	Jmag mag	Hmag mag	Kmag mag	ccf	ex	var	d2M arcsec	2M
1	0.654	01 51 38.96570	-05 04 46.9007	J015138.96-050446.9	027.912357	-05.079695	0.353	0.316	Im	15.848	0.063	15.284	0.119	11.395	0.152	9.063					0000	0	011n		2M

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