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VizieR

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I/196/annex1 Hipparcos Input Catalogue, Version 2 (Turon+ 1993)
Double and Multiple System Components (32290 rows)
  recno=27935
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ColumnValue  Explain   (UCD)
_RAJ200020 45 08.6100 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-50 30 23.200 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195020 41 33.1510 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-50 41 18.531 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon348.4778657 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-38.4129837 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)
27935recno 27935  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

CCDM20451-5030  (i) CCDM number (Catalogue I/211) (meta.id;meta.main)
rComp   Reference component when different from A (meta.note)
CompC  Component considered (meta.code.multip)
HIC102405   [1/120313] HIC number as in 'main' file (meta.id)
RAJ200020 45 08.61 "h:m:s" (i) Right Ascension J2000 (hours) (pos.eq.ra;meta.main)
DEJ2000-50 30 23.2 "d:m:s" (i) Declination J2000 (degrees) (pos.eq.dec;meta.main)
Mag 7.3 mag Magnitude (generally V, sometimes photographic for the faintest systems) (phot.mag;em.opt.V)
Obs  a Year of observation of the relative position (time.epoch)
PA123 deg [ 0-9.EFPNS]Position angle (pos.posAng)
Sep 124.4 arcsec Separation (arcsec) (pos.angDistance)
Note1    [O] O=system with known orbit (meta.note)
Note2    [A] A=astrometric binary (meta.note)
pmRA 0.025 arcsec/a Proper motion in right ascension =15.mu_alpha*cos(delta) (pos.pm;pos.eq.ra)
pmDE-0.004 arcsec/a Proper motion in declination (pos.pm;pos.eq.dec)
DMCD -50 13115  DM number. Last char is a suffix to DM, or "*" if HD convention is not followed. (meta.id)
HD197341   [1/359083] HD/HDE number (meta.id)
AG 246717  AGK3 or SAO number (meta.id)
IDS20378S5051 C  IDS number (equinox B1900), with component indication. (meta.id)
ADS    [1/17180] ADS number (meta.id)
  
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