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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=141872
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ColumnValue  Explain   (UCD)
_RAJ200021 51 49.1800 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+40 21 31.100 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195021 49 45.5134 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+40 07 24.296 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon089.7447352 deg Galactic longitude at Epoch=J2000, proper motions taken into account (pos.galactic.lon)
_Glat-10.6646124 deg Galactic latitude at Epoch=J2000, proper motions taken into account (pos.galactic.lat)
141872recno 141872  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

WDS21518+4022  (i) WDS name (based on J2000 position) (meta.id;meta.main)
DiscTDT3199  Discoverer Code (1 to 4 letters) and Number (Note 5)   (meta.id)
Comp   Components when more than 2 (Note 1)   (meta.code.multip)
Obs11991 yr Date of first satisfactory observation (time.epoch)
Obs21991 yr Date of last satisfactory observation (time.epoch)
Nobs 1  Number of Observations (up to 9999) (meta.number)
pa1123 deg Position Angle at date Obs1 (Note 2)   (pos.posAng)
pa2123 deg Position Angle at date Obs2 (Note 2)   (pos.posAng)
sep1 0.4 arcsec Separation at date Obs1 (pos.angDistance;src.orbital)
sep2 0.40 arcsec Separation at date Obs12 (pos.angDistance;src.orbital)
mag111.150 mag Magnitude of First Component (phot.mag;em.opt)
mag211.30 mag Magnitude of Second Component (phot.mag;em.opt)
SpType   Spectral Type (Primary/Secondary) (src.spType)
pmRA1 24 mas/yr Primary Proper Motion (RA) (pos.pm;pos.eq.ra)
pmDE1 -4 mas/yr Primary Proper Motion (Dec) (pos.pm;pos.eq.dec)
pmRA2 24 mas/yr Secondary Proper Motion (RA) (pos.pm;pos.eq.ra)
pmDE2 -4 mas/yr Secondary Proper Motion (Dec) (pos.pm;pos.eq.dec)
DM   Durchmusterung Number (Note 3)   (meta.id)
Notes    [B-Z ] Notes about the binary (Note 4)   (meta.note)
n_RAJ2000    [!P] indicates a position derived from WDS name (meta.note)
RAJ200021 51 49.18 "h:m:s" (i) Right Ascension J2000 (Ep=J2000, hours) (pos.eq.ra;meta.main)
DEJ2000+40 21 31.1 "d:m:s" (i) Declination J2000 (Ep=J2000, degrees) (pos.eq.dec;meta.main)
  
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