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	4.928	18 37 16.80744	+49 08 50.7624	1350-09795725	279.320031	+49.147434			18.2	16.9	1953.524
2	5.945	18 37 16.55208	+49 08 54.8232	1350-09795670	279.318967	+49.148562			19.0	18.7	1953.524
3	8.096	18 37 16.97616	+49 08 46.4100	1350-09795763	279.320734	+49.146225			19.3	18.5	1953.524

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

b-r

%22>%5cFONT SIZE=-1magMflag

1 5.29918 37 16.79688+49 08 50.3520EO0770-0133220279.319987+49.14732017.02   1 18.75 15.2 0.4519.00   2 25.97 13.0 1.98   %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	5.483	18 37 16.89768	+49 08 49.4484	N01103204977	279.320407	+49.147069	1991.600	16.60	0.43	18.65	0.42	3	4.85	0.35

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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	4.728	18 37 17.09544	+49 08 49.6212	1391-0291997	279.321231	+49.147117	999	999	1973.9	0	0	2	20.45				16.60
2	4.805	18 37 16.82688	+49 08 50.7516	1391-0291995	279.320112	+49.147431	184	45	1976.7	0	0	5	19.32	16.87	17.95	16.04	15.24
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%204.805&%3cFONT%20COLOR=%27#CD5B45%27>18%2037%2016.82688&%3cFONT%20COLOR=%27#CD5B45%27>%2b49%2008%2050.7516&1391-0291995&279.320112&%2b49.147431&184&%2045&1976.7&%20%20%20%20%200&%20%20%20%20%200&5&19.32&16.87&17.95&16.04&15.24%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6622d80c39d4e8&-out.add=.&-source=I/284/out&USNO-B1.0===1391-0291993&-out.orig=o' class='full'3 5.78718 37 16.56672+49 08 54.60001391-0291993279.319028+49.148500 971511976.7 0 0520.3018.7719.3617.8717.88 4 7.74318 37 16.96800+49 08 46.79161391-0291996279.320700+49.146331 953191976.7 0 0520.7218.9420.4917.5316.69 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20Naval%20Observatory%20Merged%20Astrometric%20Dataset%20%28NOMAD%29%20contains%0aastrometric%20and%20photometric%20data%20for%20over%201%20billion%20stars%20derived%20from%0athe%20Hipparcos%20%28I/239%29,%20Tycho-2%20%28I/259%29,%20UCAC2%20%28I/289%29,%20and%20USNO-B1.0%0a%28I/284%29%20catalogs%20for%20astrometry%20and%20optical%20photometry,%20supplemented%0aby%202MASS%20%28II/246%29%20near-infrared%20photometry.%3cBR%3e%0a%3cFONT%20SIZE=%27-1%27%3eAn%20efficient%20remote%20query%20program%20%3cB%3efindnomad1%20is%0aavailable%20in%20the%20cdsclient%20%0apackage,%20for%20Unix/Linux%20platforms%0a%3cP%3e%0a

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	4.729	18 37 17.095344	+49 08 49.62012	1391-0295799	..	279.3212306	+49.1471167	B	0.0	0.0	0.0	0.0	20.450	o
2	4.808	18 37 16.826664	+49 08 50.75016	1391-0295797	YM	279.3201111	+49.1474306	B	0.0	0.0	0.0	0.0	18.030	Y	17.840	Y	16.040	B	15.932	14.989	15.118
3	5.787	18 37 16.566672	+49 08 54.60000	1391-0295795	..	279.3190278	+49.1485000	B	0.0	0.0	0.0	0.0	19.360	B			17.870	B
4	7.744	18 37 16.968000	+49 08 46.79016	1391-0295798	YM	279.3207000	+49.1463306	B	0.0	0.0	0.0	0.0	18.350	Y			17.530	B	16.612	16.102	15.416

%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 [****ClosingBrace(s)Inserted****]
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%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_RAJ2000

%20

%22>%5cFONT SIZE=-1"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 5.48218 37 16.89792+49 08 49.4484N114004977279.320408+49.1470691991.60016.6018.6517.8516.433 4.85 0.35 2 6.19418 37 16.52784+49 08 54.9492N114004978279.318866+49.1485971991.60018.9420.3518.65  3 2.21 0.26 3 8.94718 37 17.03664+49 08 45.4416N114017262279.320986+49.1459561994.467      17.673 2.06 0.07 %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	2.551	18 37 17.12304	+49 08 51.7812	279.321346	+49.147717	47.1	46.4			20.45				16.60	2	0
2	5.130	18 37 16.81392	+49 08 50.4312	279.320058	+49.147342	0.8	-6.2	15.933	15.119	19.32	17.95	16.87	16.04	15.24	6	0
3	5.765	18 37 16.56840	+49 08 54.4452	279.319035	+49.148457	4.9	-6.6			20.30	19.36	18.77	17.87	17.88	5	0
4	8.435	18 37 16.99536	+49 08 46.0248	279.320814	+49.146118	7.7	-18.5	16.613	15.417	20.72	20.49	18.94	17.53	16.69	6	1

%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	ID	RAICRS deg	DEICRS deg	pmRAp mas/yr	pmDEp mas/yr	[****ClosingBrace(s)Inserted****]
">

mas/yr&%">\BegDIVclass='sort-down ' </A>decpmRAx
mas/yrpmDEx
mas/yr

Fmag
mag

Bjmag
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

1 5.16218 37 16.81177+49 08 50.4062XPM 278-0430628279.320049+49.147335 -0.65 -4.20 -0.13 -3.6216.59518.64617.85216.42715.933 0.09414.989  15.119   32101720818.216.9 18344.95406700M 2 9.39818 37 17.03590+49 08 44.9881XPM 278-0430631279.320983+49.145830 10.94 -27.55 11.46 -26.97        16.613 0.13916.102 0.18415.417   32101193819.318.5 18344.95406300M %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	5.130	18 37 16.81395	+49 08 50.4307	279.320058	+49.147342	0.078	0.078	18.646	0.300	16.595	0.300	16.771	0.400	15.276	0.500	1986.1200	1986.1200	0.8	4.3	-6.2	4.3
2	5.765	18 37 16.56841	+49 08 54.4450	279.319035	+49.148457	0.103	0.103	20.351	0.300	18.939	0.300	19.181	0.400	18.073	0.500	1976.7200	1976.7200	4.9	5.4	-6.6	5.4
3	8.435	18 37 16.99533	+49 08 46.0250	279.320814	+49.146118	0.087	0.094	20.490	0.400	17.530	0.400	17.292	0.400	15.380	0.500	1982.9100	1982.9100	7.7	4.6	-18.5	4.7

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	URAT1	RAICRS deg	DEICRS deg	Epoch yr	f.mag [****ClosingBrace(s)Inserted****]
">

f.mag

%20

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

pmRA
mas/yr

pmDE
mas/yr

Jmag
mag

Hmag
mag

Kmag
mag

Bmag
mag

Vmag
mag

gmag
mag

rmag
mag

imag
mag

1 5.03618 37 16.810862+49 08 50.40090696-265482279.3200933+49.14735642013.46017.555 0.026 8.4 6.115.93314.98915.119           2 6.42518 37 16.506157+49 08 55.11915696-265480279.3187757+49.14864422013.42418.765 0.053                     3 9.02718 37 17.033195+49 08 45.04380696-265483279.3210227+49.14593062013.67519.033 0.141 8.8 22.416.61316.10215.417           %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RA_ICRS deg	e_ mas	DE_ICRS deg	e_ mas	Source	Plx mas	pmRA mas/yr	pmDE mas/yr	RADEcor	Dup	<FG> e-/s	e_ e-/s	<Gmag> mag	Var
1	5.064	18 37 16.819131703	+49 08 50.47345902	279.3200797154	10.291	+49.1473537386	73.607	2120697998559557760				0.952	0	3.0299e+02	8.5848e+00	19.321	NOT_AVAILABLE

%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