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VizieR

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I/151/table3 Precise Radio Source Positions from Mark III VLBI (Ma+ 1990)
Source positions (J2000) from GLB353 solution (182 rows)
  recno=112
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ColumnValue  Explain   (UCD)
_RAJ200015 12 50.53327400 "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)
_DEJ2000-09 05 59.8279800 "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 10 08.89940344 "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 54 47.6807546 "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)
_Glon351.28925145041 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+40.13874224956 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)
112recno 112  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

IAU1510-089  IAU name of radio source (meta.id;meta.main)
Other   Other name of radio source (meta.id)
RAJ200015 12 50.533274 "h:m:s" (i) right ascension (hours) (J2000) (Note 1)   (pos.eq.ra;meta.main)
e_RAs 0.000022 s standard error of RA (seconds) (J2000) (Note 2)   (stat.error)
DEJ2000-09 05 59.82798 "d:m:s" (i) declination sign (J2000) (Note 1)   (pos.eq.dec;meta.main)
e_DEs 0.00036 arcsec standard error of DE (seconds) (Note 2)   (stat.error)
CORR 0.113  RA-DE correlation (stat.correlation)
EPOCH1984.338 a Mean Julian epoch (time.epoch)
NEXP 2  number of experiments (meta.number)
NOBS 61  number of observations (meta.number)
  
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