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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=23355
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ColumnValue  Explain   (UCD)
_RAJ200017 56 28.0200 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+51 28 25.200 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195017 55 18.1404 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+51 28 43.118 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon079.0342900 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+29.2367302 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)
23355recno 23355  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

CCDM17566+5129  (i) CCDM number (Catalogue I/211) (meta.id;meta.main)
rComp   Reference component when different from A (meta.note)
CompE  Component considered (meta.code.multip)
HIC    [1/120313] HIC number as in 'main' file (meta.id)
RAJ200017 56 28.02 "h:m:s" (i) Right Ascension J2000 (hours) (pos.eq.ra;meta.main)
DEJ2000+51 28 25.2 "d:m:s" (i) Declination J2000 (degrees) (pos.eq.dec;meta.main)
Mag11.9 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)
PA235 deg [ 0-9.EFPNS]Position angle (pos.posAng)
Sep 95.4 arcsec Separation (arcsec) (pos.angDistance)
Note1    [O] O=system with known orbit (meta.note)
Note2    [A] A=astrometric binary (meta.note)
pmRA  arcsec/a Proper motion in right ascension =15.mu_alpha*cos(delta) (pos.pm;pos.eq.ra)
pmDE  arcsec/a Proper motion in declination (pos.pm;pos.eq.dec)
DM   DM number. Last char is a suffix to DM, or "*" if HD convention is not followed. (meta.id)
HD    [1/359083] HD/HDE number (meta.id)
AG   AGK3 or SAO number (meta.id)
IDS17543N5130 E  IDS number (equinox B1900), with component indication. (meta.id)
ADS10923   [1/17180] ADS number (meta.id)
  
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