VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR .

VizieR

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I/252/out The USNO-A2.0 Catalogue (Monet+ 1998)
The Full Catalogue (526280881 rows)
  USNO-A2.0===1050-01099494
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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.

ColumnValue  Explain   (UCD)
_RAJ200003 59 41.64552 "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+16 56 30.0516 "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)
_RAB195003 56 50.42789 "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+16 48 02.5221 "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)
_Glon174.46248005 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-26.55520292 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_A2_01050-01099494  (i) Original designation in USNO-A2.0 catalogue (Note)   (meta.id;meta.main)
RAJ2000059.923523 deg (i) Right ascension (ICRS) mean of blue/red plates (pos.eq.ra;meta.main)
DEJ2000+16.941681 deg (i) Declination (ICRS) mean of blue/red plates (pos.eq.dec;meta.main)
ACTflag    [A] 'A' when star belongs to ACT (Cat. I/246) (meta.code)
Mflag    [*] '*' magnitudes are probably wrong (meta.code)
Bmag15.0 mag Magnitude from blue plate (phot.mag;em.opt.B)
Rmag12.8 mag Magnitude from red plate (phot.mag;em.opt.R)
Epoch1950.936 yr Mean epoch of position (Note)   (time.epoch)
  
elapse time 0

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