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B/wds/wds The Washington Visual Double Star Catalog (Mason+ 2001-2014)
The Washington Double Star Catalog (main part) (145980 rows)
  recno=2739
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ColumnValue  Explain   (UCD)
_RAJ200000 31 00.5700 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+28 42 10.500 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195000 28 22.0983 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+28 25 36.682 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon117.5306434 deg Galactic longitude at Epoch=J2000, proper motions taken into account (pos.galactic.lon)
_Glat-33.9544960 deg Galactic latitude at Epoch=J2000, proper motions taken into account (pos.galactic.lat)
2739recno 2739  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

WDS00310+2839  (i) WDS name (based on J2000 position) (meta.id;meta.main)
DiscCTU 1  Discoverer Code (1 to 4 letters) and Number (Note 5)   (meta.id)
CompAa,Ab  Components when more than 2 (Note 1)   (meta.code.multip)
Obs12003 yr Date of first satisfactory observation (time.epoch)
Obs22005 yr Date of last satisfactory observation (time.epoch)
Nobs 3  Number of Observations (up to 9999) (meta.number)
pa1226 deg Position Angle at date Obs1 (Note 2)   (pos.posAng)
pa2226 deg Position Angle at date Obs2 (Note 2)   (pos.posAng)
sep1 0.9 arcsec Separation at date Obs1 (pos.angDistance;src.orbital)
sep2 0.90 arcsec Separation at date Obs12 (pos.angDistance;src.orbital)
mag1 9.40 mag Magnitude of First Component (phot.mag;em.opt)
mag211.20 mag Magnitude of Second Component (phot.mag;em.opt)
SpType   Spectral Type (Primary/Secondary) (src.spType)
pmRA1 3 mas/yr Primary Proper Motion (RA) (pos.pm;pos.eq.ra)
pmDE1 2 mas/yr Primary Proper Motion (Dec) (pos.pm;pos.eq.dec)
pmRA2  mas/yr Secondary Proper Motion (RA) (pos.pm;pos.eq.ra)
pmDE2  mas/yr Secondary Proper Motion (Dec) (pos.pm;pos.eq.dec)
DM   Durchmusterung Number (Note 3)   (meta.id)
NotesK   [B-Z ] Notes about the binary (Note 4)   (meta.note)
n_RAJ2000    [!] indicates a position derived from WDS name (meta.note)
RAJ200000 31 00.57 "h:m:s" (i) Right Ascension J2000 (Ep=J2000, hours) (pos.eq.ra;meta.main)
DEJ2000+28 42 10.5 "d:m:s" (i) Declination J2000 (Ep=J2000, degrees) (pos.eq.dec;meta.main)
  
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