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VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
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J/other/RAA/18.146
  Spiral structure of the Milky Way (Xu+, 2018)
Post annotation
img(gal)
1.J/other/RAA/18.146/table2(c)Parallaxes and proper motions of masers (101 rows)
2.J/other/RAA/18.146/table3(c)Parallaxes and proper motions of O Stars (635 rows)
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Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
   (ALL)Name (char) Maser name (meta.id;meta.main)
  (1)RAJ2000 deg (i) Right ascension (J2000) (pos.eq.ra;meta.main)
  (1)DEJ2000 deg (i) Declination (J2000) (pos.eq.dec;meta.main)
  (1)plx mas Parallax (pos.parallax.trig)
  (1)e_plx mas rms uncertainty on plx (stat.error;pos.parallax)
   (ALL)pmRA mas/yr Proper motion along RA (pmRA*cosDE) (pos.pm;pos.eq.ra)
   (ALL)e_pmRA mas/yr rms uncertainty on pmRA (stat.error;pos.pm;pos.eq.ra)
   (ALL)pmDE mas/yr Proper motion along DE (pos.pm;pos.eq.dec)
   (ALL)e_pmDE mas/yr rms uncertainty on pmDE (stat.error;pos.pm;pos.eq.dec)
   (ALL)Vlsr km/s LSR velocity (phys.veloc;pos.lsr)

ALL cols
    
 (i)indexed column
   (ALL)e_Vlsr km/s rms uncertainty on Vlsr (stat.error;phys.veloc;pos.lsr)
   (ALL)Arm (char) Spiral arm in which it resides (meta.id.parent)
   (ALL)GLON deg Galactic longitude (pos.galactic.lon)
   (ALL)GLAT deg Galactic latitude (pos.galactic.lat)
  (2)RA_ICRS deg (i) Right ascension (ICRS) at epoch 2015.5 (pos.eq.ra;meta.main)
  (2)DE_ICRS deg (i) Declination (ICRS) at epoch 2015.5 (pos.eq.dec;meta.main)
  (2)Plx mas Gaia DR2 Parallax (pos.parallax)
  (2)e_Plx mas rms uncertainty on Plx (stat.error;pos.parallax)
  (2)SpType (char) Spectral type (src.spType)
  (2)GaiaDR2  Gaia DR2 source number (meta.id)
  (2)Simbad (char) ask the Simbad data-base about this object (meta.ref.url)
  (2)_RA.icrs deg (n)(i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
  (2)_DE.icrs deg (n)(i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
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