VizieR

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VizieR

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The 5 columns in color are computed by VizieR, and are not part of the original data.
Full

_r
arcsec
_RAJ2000
"h:m:s"
_DEJ2000
"d:m:s"
Name

RAB1950
"h:m:s"
DEB1950
"d:m:s"
bmag
mag
Nfields

Flag1

Flag2

Flag3

_RA.icrs
"h:m:s"
_DE.icrs
"d:m:s"
1 6.31216 25 10.00721+03 30 23.1767+03.051016 22 40.029+03 37 11.1217.46100016 25 10.007+03 30 23.18
%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%25
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 5.83816 25 10.04352+03 30 23.19120900-08638168246.291848+03.506442    13.412.81950.296
2 8.12716 25 09.98880+03 30 20.56320900-08638153246.291620+03.505712    17.115.31950.296
%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cB%3e%3cFONT%20COLOR=%27#CD5B45%27>%20The%20current%20version%20includes%20only%20the%20North%20%28POSS-I%20plates%29%3cP%3e%0a
%22>
>\BegDIVclass='sort-down ' </A>
dec 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
mag
Mflag

1 5.77016 25 10.06800+03 30 22.7808EO0088-0391703246.291950+03.50632812.51   1 16.65 23.1 0.1814.16   2 31.89 22.4 1.64  

Note: The construction of the GSC-II is still in progress: this version has no proper motions, and the magnitude limits are 18.5 in F (red) and 19.5 in J (blue). The data are copyrighted, check the data use Policy.

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 6.01716 25 10.03728+03 30 23.0040N10210126557246.291822+03.5063901993.39012.22 0.4114.09 0.413 8.67 0.11
%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 5.90216 25 10.04136+03 30 23.12280935-0268271246.291839+03.506423 66 311976.3 2 2513.8413.0713.3211.2511.24
%0a%0a%3cP%3e%0a%0a%5b%2a%2a%2a%2aClosingBrace%28s%29Inserted%2a%2a%2a%2a%5d">

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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