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B/wds/wds The Washington Visual Double Star Catalog (Mason+ 2001-2020)
The Washington Double Star Catalog (main part) (154252 rows)
  recno=141871
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ColumnValue  Explain   (UCD)
_RAJ200021 51 46.8200 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+41 28 03.000 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195021 49 44.2837 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+41 13 56.072 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon090.4583768 deg Galactic longitude at Epoch=J2000, proper motions taken into account (pos.galactic.lon)
_Glat -9.8064544 deg Galactic latitude at Epoch=J2000, proper motions taken into account (pos.galactic.lat)
141871recno 141871  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

WDS21518+4128  (i) WDS name (based on J2000 position) (meta.id;meta.main)
DiscKPP4253  Discoverer Code (1 to 4 letters) and Number (Note 5)   (meta.id)
Comp   Components when more than 2 (Note 1)   (meta.code.multip)
Obs12012 yr Date of first satisfactory observation (time.epoch)
Obs22015 yr Date of last satisfactory observation (time.epoch)
Nobs 3  Number of Observations (up to 9999) (meta.number)
pa1267 deg Position Angle at date Obs1 (Note 2)   (pos.posAng)
pa2269 deg Position Angle at date Obs2 (Note 2)   (pos.posAng)
sep1 4.2 arcsec Separation at date Obs1 (pos.angDistance;src.orbital)
sep2 4.30 arcsec Separation at date Obs12 (pos.angDistance;src.orbital)
mag110.000 mag Magnitude of First Component (phot.mag;em.opt)
mag214.90 mag Magnitude of Second Component (phot.mag;em.opt)
SpType   Spectral Type (Primary/Secondary) (src.spType)
pmRA1 42 mas/yr Primary Proper Motion (RA) (pos.pm;pos.eq.ra)
pmDE1 0 mas/yr Primary Proper Motion (Dec) (pos.pm;pos.eq.dec)
pmRA2 40 mas/yr Secondary Proper Motion (RA) (pos.pm;pos.eq.ra)
pmDE2 -2 mas/yr Secondary Proper Motion (Dec) (pos.pm;pos.eq.dec)
DM   Durchmusterung Number (Note 3)   (meta.id)
NotesT   [B-Z ] Notes about the binary (Note 4)   (meta.note)
n_RAJ2000    [!P] indicates a position derived from WDS name (meta.note)
RAJ200021 51 46.82 "h:m:s" (i) Right Ascension J2000 (Ep=J2000, hours) (pos.eq.ra;meta.main)
DEJ2000+41 28 03.0 "d:m:s" (i) Declination J2000 (Ep=J2000, degrees) (pos.eq.dec;meta.main)
  
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