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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=4786
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ColumnValue  Explain   (UCD)
_RAJ200003 57 51.2200 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+40 00 36.700 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195003 54 29.4286 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+39 52 02.470 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon157.3537743 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-10.0884986 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)
4786recno 4786  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

CCDM03579+4001  (i) CCDM number (Catalogue I/211) (meta.id;meta.main)
rComp   Reference component when different from A (meta.note)
CompA  Component considered (meta.code.multip)
HIC 18532   [1/120313] HIC number as in 'main' file (meta.id)
RAJ200003 57 51.22 "h:m:s" (i) Right Ascension J2000 (hours) (pos.eq.ra;meta.main)
DEJ2000+40 00 36.7 "d:m:s" (i) Declination J2000 (degrees) (pos.eq.dec;meta.main)
Mag 3.0 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)
PA  deg [ 0-9.EFPNS]Position angle (pos.posAng)
Sep  arcsec Separation (arcsec) (pos.angDistance)
Note1    [O] O=system with known orbit (meta.note)
Note2    [A] A=astrometric binary (meta.note)
pmRA 0.018 arcsec/a Proper motion in right ascension =15.mu_alpha*cos(delta) (pos.pm;pos.eq.ra)
pmDE-0.024 arcsec/a Proper motion in declination (pos.pm;pos.eq.dec)
DMBD +39 895  DM number. Last char is a suffix to DM, or "*" if HD convention is not followed. (meta.id)
HD 24760   [1/359083] HD/HDE number (meta.id)
AG 56840  AGK3 or SAO number (meta.id)
IDS03511N3943 A  IDS number (equinox B1900), with component indication. (meta.id)
ADS 2888   [1/17180] ADS number (meta.id)
  
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