VizieR

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VizieR

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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.

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 _RAJ2000
"h:m:s"
 _DEJ2000
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USNO-A2.0
RAJ2000
deg
DEJ2000
deg
ACTflag
Mflag
Bmag
mag
Rmag
mag
Epoch
yr
1 0.36520 35 00.46416-17 44 49.31160675-35605506308.751934-17.747031    13.411.91982.628
%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eGuide%20Star%20Catalog%20has%20been%20constructed%20to%20support%20the%20%0aoperational%20need%20of%20the%20Hubble%20Space%20Telescope.%0aIt%20contains%20over%2025%20million%20positions%20for%20about%2019%20million%0aobjects,%20of%20which%20more%20than%2015%20million%20are%20classified%20as%20stars.%0aThe%20version%20%3cB%3e1.2%20is%20a%20new%20astrometric%20reduction%20which%20results%20in%0aabsolute%20position%20errors%20about%200.3-0.4%20arcsec.%0a%28see%20GSC%20pages%20at%20URL%20http://www-gsss.stsci.edu/gsc/gsc.html%29%0a%3cP%3e%0a
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RAJ2000
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DEJ2000
deg
PosErr
arcsec
Pmag
mag
e_
mag
n_
Class
Plate
Epoch
yr
1 0.1920 35 00.4752-17 44 49.5600633400407308.75198-17.74710 0.413.84 0.40 0000SA1981.432
2 0.4720 35 00.4920-17 44 49.4160633400407308.75205-17.74706 0.313.50 0.40 0004O91976.709
3 0.6320 35 00.4560-17 44 49.0560633400407308.75190-17.74696 0.513.96 0.40 00006M1979.481
%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eGSC-ACT%20%3cEM%3e%28or%20%3cB%3eGSC1.3%29%0ais%20a%20recalibration%20of%20the%20%3cB%3e<%25E%20I/220%7cGSC1.1>,%20the%20catalogue%20constructed%20%0ato%20support%20the%20operational%20need%20of%20the%20Hubble%20Space%20Telescope,%0awith%20the%20%3cB%3e<%25E%20I/246%7cACT>,%20the%20combination%20of%20the%20Astrographic%20Catalogue%0aand%20the%20%3cB%3e%3cEM%3eTycho%20catalogue%20derived%20from%20the%20%3cEM%3e<%25E%20I/239%7cHipparcos>%0amission;%20see%20http://www.projectpluto.com/gsc_act.htm%20for%20more%20details%0aabout%20this%20recalibration.%0a%3cP%3e%0a
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">\FONT SIZE=-1arcsec &%25%0a%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_RAJ2000
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%3cBR%3e%0a%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.35&%3cFONT%20COLOR=%27#CD5B45%27>20%2035%2000.4848&%3cFONT%20COLOR=%27#CD5B45%27>-17%2044%2049.488&0633400407&308.75202&-17.74708&%200.4&13.85&%200.40&%200&0&1981.432%3cBR%3e%0a%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%200.36&%3cFONT%20COLOR=%27#CD5B45%27>20%2035%2000.4896&%3cFONT%20COLOR=%27#CD5B45%27>-17%2044%2049.632&0633400407&308.75204&-17.74712&%200.3&13.51&%200.41&%200&0&1976.709%3cBR%3e%0a%3cEM%3e3&%3cFONT%20COLOR=%27#CD5B45%27>%200.72&%3cFONT%20COLOR=%27#CD5B45%27>20%2035%2000.4440&%3cFONT%20COLOR=%27#CD5B45%27>-17%2044%2049.020&0633400407&308.75185&-17.74695&%200.5&13.96&%200.40&%200&0&1979.481%3cBR%3e%0a %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
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deg
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yr
Rmag
mag
e_
mag
Bjmag
mag
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mag
Class
a
pix
e
1 0.13620 35 00.47064-17 44 49.5744S3311223664308.751961-17.7471041990.72612.17 0.4213.54 0.420 6.30 0.08
%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20Detailed%20introduction%20can%20be%20found%20in%20intro.tex%7cintro.tex%20%28see%20also%20http://aries.usno.navy.mil/ad/ac.html%29%20Direct%20links%20to%20Hipparcos%20and%20Tycho%20observations%20are%20provided%20from%20the%20relevant%20columns.%3cP%3e%0a
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Bmag
mag
mEp
yr
e_RAJ2000
(...)
e_DEJ2000
arcsec
ACnum
TYC2
Vmag
mag
1 1.21420 35 00.49600-17 44 48.550020 35 00.496-17 44 48.5513.151916.431     2848450    
%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
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arcsec
_RAJ2000
"h:m:s"
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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 0.38520 35 00.47880-17 44 49.35120722-1142048308.751995-17.747042 81 501977.2 0 0514.3013.2614.4112.5811.48 2 2.03020 35 00.33552-17 44 50.53200722-1142045308.751398-17.747370 855361977.2 -132 -114320.52  14.3112.58   %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20More%20recent%20versions%20available:%20UCAC3%20%28I/315%29%20and%20UCAC4%20%28I/322%29;%20see%20also%20the%20UCAC%20home%20page%20at%20http://ad.usno.navy.mil/ucac/%3cP%3e%0a
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2UCAC
RAJ2000
deg
e_
mas
DEJ2000
deg
e_
mas
UCmag
mag
No
Nc
pmRA
mas/yr
pmDE
mas/yr
2Mkey
Jmag
mag
Kmag
mag
1 0.27520 35 00.470352-17 44 49.4152825219095308.7519598 17-17.7470598 1512.40 4 3 -3.3 -10.5127466663911.05710.487
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Var
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mag
RAICRS
"h:m:s"
pmRA
cs/yr
DEICRS
"d:m:s"
pmDE
10mas/yr
Epoch
yr
SpType
HIP
_RA.icrs
"h:m:s"
_DE.icrs
"d:m:s"
1 0.27520 35 00.470333-17 44 49.41500239400  12.4020 35 00.4703 -0.0230-17 44 49.415 -1.0501999.33  U2 2521909520 35 00.4703-17 44 49.415

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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.275&%3cFONT%20COLOR=%27#CD5B45%27>20%2035%2000.470333&%3cFONT%20COLOR=%27#CD5B45%27>-17%2044%2049.41500&239400&%20&12.40&20%2035%2000.4703&%20-0.0230&-17%2044%2049.415&%20%20-1.050&1999.33&%20&U2%20%2025219095&%3cFONT%20COLOR=%27#CD5B45%27>20%2035%2000.4703&%3cFONT%20COLOR=%27#CD5B45%27>-17%2044%2049.415%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