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===0975-07935332
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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 USNO-A1.0 was created by Dave Monet () and collaborators at Flagstaff Station, U.S. Naval Observatory; it is superseded by the new PMM-USNO-A2.0 version.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)
_RAJ200015 26 13.99272 "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+08 18 03.8232 "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)
_RAB195015 23 47.89343 "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+08 28 30.9022 "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 13.05715745 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 48.86316015 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-A1.00975-07935332  (i) Original designation in USNO-A1.0 catalogue (Note)   (meta.id;meta.main)
RA(ICRS)231.558303 deg (i) Right ascension (ICRS) mean of blue/red plates (pos.eq.ra;meta.main)
DE(ICRS) 8.301062 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)
Bmag17.5 mag Magnitude from blue plate (phot.mag;em.opt.B)
Rmag17.5 mag Magnitude from red plate (phot.mag;em.opt.R)
Epoch1955.377 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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