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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=3505
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ColumnValue  Explain   (UCD)
_RAJ200002 51 02.3100 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-21 00 14.600 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195002 48 46.1691 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-21 12 33.049 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon206.7966464 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-62.0922981 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)
3505recno 3505  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

CCDM02510-2100  (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 13288   [1/120313] HIC number as in 'main' file (meta.id)
RAJ200002 51 02.31 "h:m:s" (i) Right Ascension J2000 (hours) (pos.eq.ra;meta.main)
DEJ2000-21 00 14.6 "d:m:s" (i) Declination J2000 (degrees) (pos.eq.dec;meta.main)
Mag 4.8 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-0.053 arcsec/a Proper motion in right ascension =15.mu_alpha*cos(delta) (pos.pm;pos.eq.ra)
pmDE-0.018 arcsec/a Proper motion in declination (pos.pm;pos.eq.dec)
DMBD -21 509  DM number. Last char is a suffix to DM, or "*" if HD convention is not followed. (meta.id)
HD 17824   [1/359083] HD/HDE number (meta.id)
AG 168094  AGK3 or SAO number (meta.id)
IDS02465S2125 A  IDS number (equinox B1900), with component indication. (meta.id)
ADS 2179   [1/17180] ADS number (meta.id)
  
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