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	1.279	20 59 58.15608	+19 27 27.5112	1050-19021011	314.992317	+19.457642			19.5	18.9	1953.748

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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	0.732	20 59 58.13136	+19 27 27.0828	1094-0542018	314.992214	+19.457523	136	205	1972.6	0	0	4	20.10	19.33	20.41	19.58

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">  _r
arcsec _RAJ2000
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YM

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degDEJ2000
degr

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

Vmag
magr_

Rmag
magr_

Jmag
magHmag
magKmag
magR

1 0.72920 59 58.131336+19 27 27.079921094-0580664..314.9922139+19.4575222B 0.0 0.0 0.0 0.020.410B    19.580B         %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	0.565	20 59 58.14672	+19 27 26.4996	N2Q4008101	314.992278	+19.457361	1992.648	19.47	20.80	19.09		3	2.40	0.27

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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	0.594	20 59 58.13520	+19 27 26.8776	314.992230	+19.457466	-1.7	-11.4			20.10	20.41	19.33	19.58		4	0
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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	0.594	20 59 58.13519	+19 27 26.8781	314.992230	+19.457466	0.115	0.115	20.796	0.300	19.467	0.300	19.707	0.400	18.653	0.500	1972.6800	1972.6800	-1.7	6.1	-11.4	6.1

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RA_ICRS deg	e_ mas	DE_ICRS deg	e_ mas	Source	Plx mas	e_ mas	pmRA [****ClosingBrace(s)Inserted****]
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pmRA

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RPmag
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BP-RP
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RV
km/s

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Teff
K

AG
mag

E(BP-RP)
mag

Rad
solRad

Lum
solLum

1 0.04120 59 58.1097237378+19 27 26.421825337314.99212384891 1.7513+19.45733939593 1.54751765410985211278848            0 1.0958e+02 1.8203e+0020.58910.0180 7.6728e+01 1.0767e+0120.63900.1524 7.8082e+01 1.1210e+0120.03050.1559 0.6085               %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	e_ mas	PM mas/yr	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	RUWE	FG e-/s	e_ e-/s	Gmag mag	e_ mag	FBP e-/s	e_ e-/s	BPmag mag	e_ mag	FRP e-/s	e_ e-/s	RPmag mag	e_ mag	BP-RP mag	RVDR2 km/s	e_ km/s	Tefftemp K	loggtemp [****ClosingBrace(s)Inserted****]
loggtemp ">
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