VizieR

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VizieR

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I/243/out The PMM USNO-A1.0 Catalogue (Monet 1997)
The Full Catalogue (488006860 rows)
  USNO-A1.0===1350-14702073
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Note: USNO-A1.0 contains 488,006,860 sources, and was compiled from the blue/red overlaps of the detection lists generated from scans of POSS-I O and E plates (>=-30°) and SRC-J and ESO-R plates (<=-35°). USNO-A1.0 was created by Dave Monet () and collaborators at Flagstaff Station, U.S. Naval Observatory; it is superseded by the new PMM-USNO-A2.0 version.
The VizieR search engine uses an on-line compressed version (3.4Gbytes) which was generated at CDS.

ColumnValue  Explain   (UCD)
_RAJ200021 33 43.64472 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+51 07 24.4524 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195021 31 59.27126 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+50 54 02.0982 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon 94.45753423 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat -0.47738513 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)

USNO-A1.01350-14702073  (i) Original designation in USNO-A1.0 catalogue (Note)   (meta.id;meta.main)
RA(ICRS)323.431853 deg (i) Right ascension (ICRS) mean of blue/red plates (pos.eq.ra;meta.main)
DE(ICRS) 51.123459 deg (i) Declination (ICRS) mean of blue/red plates (pos.eq.dec;meta.main)
GSCflag    [G] 'G' when star belongs to GSC (Cat. I/220) (meta.note)
Mflag    [*] '*' magnitudes are probably wrong (meta.code)
Bmag15.8 mag Magnitude from blue plate (phot.mag;em.opt.B)
Rmag14.6 mag Magnitude from red plate (phot.mag;em.opt.R)
Epoch1952.705 yr Mean epoch of position (Note)   (time.epoch)
  
elapse time 1

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Rules of usage of VizieR data

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