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V/137D/XHIP Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)
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XHIP catalog: astrometry, spectrography, space motions, exoplanets, photometry, and references (117955 rows) 		  recno=18170
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ColumnValue  Explain   (UCD)
_RAJ200003 53 42.7030558 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-24 36 44.029322 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195003 51 34.9382575 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-24 45 32.502353 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon219.9954691589 deg Galactic longitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lon)
_Glat-49.1429081608 deg Galactic latitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lat)
18170recno 18170  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
HIP 18216  (i) Hipparcos identifier (linked to details from HIP catalogs) (meta.id;meta.main)
Comp   Component(s) (Note 1)   (meta.code.multip)
Classes*,V*,Ro*,IR,UV,SB*  SIMBAD classifications (comma separated) (Note 2)   (src.class)
Gr    Cluster or Association membership(s) (Note 3)   (meta.code.member)
RAJ2000058.42784564 deg (i) Right ascension (ICRS, Epoch=J1991.25) (pos.eq.ra;meta.main)
e_RAJ2000 0.16 mas Standard error on RA*cos(DEdeg) (stat.error;pos.eq.ra)
DEJ2000-24.61221260 deg (i) Declination (ICRS, Epoch=J1991.25) (pos.eq.dec;meta.main)
e_DEJ2000 0.20 mas Standard error on DE (stat.error;pos.eq.dec)
Plx 8.65 mas Trigonometric parallax (pos.parallax.trig)
e_Plx 0.30 mas Standard error on Plx (stat.error;pos.parallax)
pmRA 31.33 mas/yr Proper motion in RA*cos(DEdeg) (pos.pm;pos.eq.ra)
e_pmRA 0.20 mas/yr Standard error on pmRA (stat.error;pos.pm;pos.eq.ra)
pmDE -7.31 mas/yr Proper motion in Declination (pos.pm;pos.eq.dec)
e_pmDE 0.25 mas/yr Standard error on pmDE (stat.error;pos.pm;pos.eq.dec)
r_HIP2   [1/2] Reference for Hipparcos astrometry (Note 4)   (meta.ref;pos.frame)
r_pm3   [1/3] Reference for proper motion (Note 5)   (meta.ref;pos.frame)
GLon219.99547278 deg Galactic longitude (Note 6)   (pos.galactic.lon)
GLat-49.14290714 deg Galactic latitude (Note 6)   (pos.galactic.lat)
Dist 115.44 pc Heliocentric distance (Note 7)   (pos.distance)
e_Dist 3.5 % Distance error expressed as percentage (Note 8)   (stat.error)
pmGLon 14.52 mas/yr Proper motion in GLon*cos(GLat) (pos.pm)
pmGLat 28.70 mas/yr Proper motion in GLat (pos.pm)
X -57.9 pc Heliocentric distance towards Gal. center (pos.distance)
Y -48.5 pc Heliocentric distance towards Gal. rotation (pos.distance)
Z -87.3 pc Heliocentric distance towards N. Gal. Pole (pos.distance)
RGal7458 pc Galactocentric distance (Note 9)   (pos.distance;pos.galactocentric)
vT 17.6 km/s Transverse velocity (phys.veloc)
SpTypeB5 V  Spectral type (MK, HD, or other) (src.spType)
Tc 25   ]0/140[ Temperature class codified (Note 10)   (src.spType)
Lc5   [1/6] Luminosity class codified (Note 11)   (src.class.luminosity)
RV 20.50 km/s Radial velocity (spect.dopplerVeloc;pos.heliocentric)
e_RV 0.20 km/s Standard error on RV (Note 12)   (stat.error)
q_RVA   [ABCD] Quality flag on RV (Note 13)   (meta.code.qual)
[Fe/H]  [Sun] Iron abundance (phys.abund.Fe)
e_[Fe/H]  [Sun] Standard error on [Fe/H] (Note 14)   (stat.error;phys.abund.Fe)
q_[Fe/H]    [ABC] Quality flag on [Fe/H] (Note 15)   (meta.code.qual;phys.abund.Fe)
age  Gyr Age, in billions of years (time.age)
b_age  Gyr Lower confidence limit on age (time.age;stat.fit.param)
B_age  Gyr Upper confidence limit on age (time.age;stat.fit.param)
U -14.3 km/s Heliocentric velocity towards Gal. center (spect.dopplerVeloc;pos.heliocentric)
V -22.3 km/s Heliocentric velocity towards Gal. rotation (phys.veloc.rotat;pos.heliocentric)
W -5.2 km/s Heliocentric velocity towards N. Gal. Pole (spect.dopplerVeloc;em.IR.8-15um)
UVW 27.0 km/s Total heliocentric velocity (phys.veloc)
Dmin 75.21 pc Minimum distance at solar encounter (Note 16)   (pos.distance)
Tmin-3169 kyr Timing of Dmin, in thousands of years (Note 17)   (time.epoch)
e 0.0650   Total orbital eccentricity (Note 18)   (src.orbital.eccentricity)
phi 176.0 deg [-180/180] Pericenter position angle (Note 18)   (src.orbital.periastron)
a 7004 pc Semi-major axis of orbit (Note 18)   (phys.size.smajAxis)
b 6989 pc Semi-minor axis of orbit (Note 18)   (phys.size.sminAxis)
c 456 pc Focus-to-center distance of orbit (=a.e) (Note 18)   (pos.distance;src.orbital)
L 6974 deg Semilatus rectum of orbit (Note 18)   (src.orbital)
Rmin6548 pc Orbital radius at pericenter (Note 18)   (pos.distance;src.orbital)
Rmax 7460 pc Orbital radius at apocenter (Note 18)   (pos.distance;src.orbital)
Npl    Number of exoplanets (known in April 2012) (meta.number)
Mpl   Exoplanet discovery method(s) (Note 19)   (meta.code;obs)
SimbadSimbad  ask the Simbad data-base about this object (meta.ref)
Hpmag 4.596 mag Median magnitude in Hipparcos system (phot.mag;em.opt.V)
e_Hpmag 0.001 mag Standard error on Hpmag (stat.error;phot.mag;em.IR.H)
m_Hpmag    [A-Z*-] Reference flag for Hpmag (Note 20)   (meta.code.multip)
Hpmax 4.58 mag Hpmag at maximum (5th percentile) (phot.mag;em.opt.V)
Hpmin 4.61 mag Hpmag at minimum (95th percentile) (phot.mag;em.IR.H)
Per 0.86 d Variability period (src.var)
HvarP mag [CDMPRU] Variability type (Note 21)   (meta.code;src.var)
Umag  mag Apparent magnitude in Johnson U (phot.mag;em.opt.U)
Bmag 4.504 mag Apparent magnitude in Johnson B (phot.mag;em.opt.B)
Vmag 4.64 mag Apparent magnitude in Johnson V (phot.mag;em.opt.V)
Rmag  mag Apparent magnitude in R (phot.mag;em.opt.R)
Imag 4.742 mag Apparent magnitude in I (phot.mag;em.opt.I)
Jmag 4.977 mag J selected default magnitude (Note 22)   (phot.mag;em.IR.J)
e_Jmag 0.198 mag J total magnitude uncertainty (Note 22)   (stat.error;phot.mag;em.IR.J)
Hmag 4.962 mag H selected default magnitude (Note 22)   (phot.mag;em.IR.H)
e_Hmag 0.016 mag H total magnitude uncertainty (Note 22)   (stat.error;phot.mag;em.IR.H)
Kmag 4.938 mag K selected default magnitude (Note 22)   (phot.mag;em.IR.K)
e_Kmag 0.018 mag K total magnitude uncertainty (Note 22)   (stat.error;phot.mag;em.IR.K)
2MASS03534270-2436438  2MASS source designation (linked to details from 2MASS-PSC catalog) (Note 22)   (meta.id.cross)
q2MCAA  JHK photometric quality flag (Note 22)   (meta.code.qual;phot)
B-V-0.136 mag Johnson B-V color index (phot.color;em.opt.B;em.opt.V)
e_B-V 0.006 mag Standard error on B-V (stat.error;phot.color;em.opt.B)
V-I-0.13 mag Color index in Cousins' system (phot.color;em.opt.V;em.opt.I)
e_V-I 0.02 mag Standard error on V-I (stat.error;phot.color;em.opt.V)
HpMag-0.716 mag Absolute Magnitude of Hpmag (Note 23)   (phot.mag;em.IR.H)
UMag  mag Absolute Magnitude in Johnson U (Note 23)   (phot.mag;em.opt.U)
BMag-0.81 mag Absolute Magnitude in Johnson B (Note 23)   (phys.magAbs;em.opt.B)
VMag-0.67 mag Absolute Magnitude in Johnson V (Note 23)   (phys.magAbs;em.opt.V)
RMag  mag Absolute Magnitude in R (Note 23)   (phys.magAbs;em.opt.R)
IMag-0.57 mag Absolute Magnitude in I (Note 23)   (phys.magAbs;em.opt.I)
JMag-0.33 mag Absolute Magnitude J (Note 23)   (phys.magAbs;em.IR.J)
HMag-0.35 mag Absolute Magnitude H (Note 23)   (phys.magAbs;em.IR.H)
KMag -0.37 mag Absolute Magnitude K (Note 23)   (phys.magAbs;em.IR.K)
Lum 371.46 Lsun Stellar luminosity (Note 23)   (phys.luminosity)
magmin 3.71 mag Apparent magnitude V at Tmin (main.dat) (phot.mag)
HD 24587   Henry Draper catalog identifier (meta.id)
CstEri  Constellation membership (meta.code.member)
Atlas 355  Millennium Star Atlas page number (meta.bib.page)
Coords03537s2461  RA, DE in compact format; n = + ; s = - (meta.id)
Name33 Tau-8 Eridani  Star name(s) (meta.id)
GrpName   Cluster or Association name(s) (linked to Group characteristics ) (meta.id.parent)
CompID   Reference for Comp (main.dat) (meta.id)
rSpType1988MSS...C04....0H  Reference for SpType (main.dat) (Note 24)   (meta.ref;pos.frame)
r_RV588  Reference for RV (main.dat) (meta.ref;pos.frame)
r_[Fe/H]   Reference(s) for [Fe/H] (main.dat) (meta.ref)
  
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