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	1.334	19 39 51.98280	+48 33 24.9300	1350-10874467	294.966595	+48.556925			18.4	18.9	1951.522
2	9.424	19 39 51.02352	+48 33 20.1708	1350-10874064	294.962598	+48.555603			19.0	19.5	1951.522

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eUSNO-B%20Catalog%20presents%20positions,%20proper%20motions,%20%0amagnitudes%20un%20blue,%20red%20and%20infrared,%20as%20well%20as%20star/galaxy%20estimators%0afor%201,045,175,762%20objects%20derived%20from%203,648,832,040%20separate%20observations.%0aThe%20data%20were%20taken%20from%20scans%20of%207,435%20Schmidt%20plates%0ataken%20from%20various%20sky%20surveys%20during%20the%20last%2050%20years.%3cBR%3e%0aUSNO-B1.0%20catalog%20was%20created%20by%20Dave%20Monet%20and%20collaborators%0aat%20http://www.nofs.navy.mil/data/fchpix/%20%3cBR%3e%0a%3cB%3e%3cFONT%20COLOR=%27#EE0000%27>%20Note%20that%20the%20star/galaxy%20estimators%20may%20be%20mixed%20up%0a%20in%20dense%20regions.%0a%3cP%3e%0a

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	1.065	19 39 51.95616	+48 33 24.8220	1385-0316449	294.966484	+48.556895	105	125	1974.6	0	0	5	19.45	18.72	19.86	18.94	18.58
2	9.371	19 39 51.02616	+48 33 20.2320	1385-0316443	294.962609	+48.555620	129	91	1974.6	0	0	5	19.79	19.06	20.54	19.07	18.86
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%209.371&%3cFONT%20COLOR=%27#CD5B45%27>19%2039%2051.02616&%3cFONT%20COLOR=%27#CD5B45%27>%2b48%2033%2020.2320&1385-0316443&294.962609&%2b48.555620&129&%2091&1974.6&%20%20%20%20%200&%20%20%20%20%200&5&19.79&19.06&20.54&19.07&18.86%3cBR%3e">\EndTABLESORT

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	1.063	19 39 51.955992	+48 33 24.81984	1385-0320675	..	294.9664833	+48.5568944	B	0.0	0.0	0.0	0.0	19.860	B			18.940	B
2	9.374	19 39 51.025992	+48 33 20.22984	1385-0320668	..	294.9626083	+48.5556194	B	0.0	0.0	0.0	0.0	20.540	B			19.070	B

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

yr&%">\BegDIVclass='sort-down ' </A>decFmag
magjmag
mag

Vmag
magNmag
magClass

a
pixe

1 1.12519 39 51.96216+48 33 24.7932N2HI019189294.966509+48.5568871991.52119.0119.87  18.683 2.80 0.25 2 9.45619 39 51.03912+48 33 19.8468N2HI019117294.962663+48.5555131991.52119.1420.5419.0018.853 2.41 0.12 %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	0.980	19 39 51.94560	+48 33 24.6276	294.966440	+48.556841	-4.7	-2.4			19.45	19.86	18.72	18.94	18.58	5	0
2	9.481	19 39 51.02424	+48 33 20.0448	294.962601	+48.555568	-0.7	-1.8			19.79	20.54	19.06	19.07	18.86	5	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 0.98019 39 51.94559+48 33 24.6281294.966440+48.556841 0.103 0.10319.873 0.30019.008 0.30019.199 0.40018.468 0.5001974.69001974.6900 -4.7 5.4 -2.4 5.4 2 9.48019 39 51.02428+48 33 20.0452294.962601+48.555568 0.103 0.10320.541 0.30019.136 0.30019.378 0.40018.274 0.5001974.69001974.6900 -0.7 5.4 -1.8 5.4 %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	9.504	19 39 51.019600698	+48 33 20.07884574	294.9625816696	0.900	+48.5555774571	1.599	2128772640154846464				0.826	0	2.0771e+02	2.2560e+00	19.731	NOT_AVAILABLE

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	ipix	comp	pmRA mas/yr	pmDE mas/yr	Jmag mag	Hmag mag	Kmag mag	B1mag mag	B2mag mag	R1mag [****ClosingBrace(s)Inserted****]
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R1mag

%20

%22>%5cFONT SIZE=-1magR2mag
mag

Imag
mag

GaiaId

Gmag
mag

Clone

Nosc

1 9.48119 39 51.021744888+48 33 20.08693584294.9625906037+48.5555797044 158776136877326936   -1.419 -0.540      19.7920.5419.0619.0718.86212877264015484646419.731     %0a%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	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Dup	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	RV km/s	e_ km/s	Teff K	AG mag	E(BP-RP) mag	Rad solRad	[****ClosingBrace(s)Inserted****]
solRad
">
	\BegDIVclass='sort-down '
</A>
decLum solLum
1	9.058	19 39 51.0801567593	+48 33 19.947165739	294.96283398650	0.7342	+48.55554087937	3.5425	2128772644454125312							0	1.2197e+02	1.3609e+00	20.4727	0.0121
2	9.504	19 39 51.0219351221	+48 33 20.124425252	294.96258155840	0.2671	+48.55557741573	0.3581	2128772640154846464	0.6578	0.3199	-1.512	0.596	-2.950	0.729	0	2.2314e+02	9.5812e-01	19.8169	0.0047	1.9246e+02	6.9634e+00	19.6405	0.0393	2.1306e+02	7.6700e+00	18.9407	0.0391	0.6998

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