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V/137D/XHIP Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)
XHIP catalog: astrometry, spectrography, space motions, exoplanets, photometry, and references (117955 rows)
  recno=31597
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ColumnValue  Explain   (UCD)
_RAJ200006 37 42.7105031 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+16 23 57.409536 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195006 34 49.4799071 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+16 26 38.079554 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon196.7734602330 deg Galactic longitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lon)
_Glat+04.4526178194 deg Galactic latitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lat)
31597recno 31597  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

HIP 31681  (i) Hipparcos identifier (linked to details from HIP catalogs) (meta.id;meta.main)
CompA  Component(s) (Note 1)   (meta.code.multip)
Classes**,*i*,IR,X,*,UV,SB*,SB*  SIMBAD classifications (comma separated) (Note 2)   (src.class)
Gr    Cluster or Association membership(s) (Note 3)   (meta.code.member)
RAJ2000099.42792544 deg (i) Right ascension (ICRS, Epoch=J1991.25) (pos.eq.ra;meta.main)
e_RAJ2000 2.12 mas Standard error on RA*cos(DEdeg) (stat.error;pos.eq.ra)
DEJ2000+16.39941401 deg (i) Declination (ICRS, Epoch=J1991.25) (pos.eq.dec;meta.main)
e_DEJ2000 1.53 mas Standard error on DE (stat.error;pos.eq.dec)
Plx 29.84 mas Trigonometric parallax (pos.parallax.trig)
e_Plx 2.23 mas Standard error on Plx (stat.error;pos.parallax)
pmRA 13.81 mas/yr Proper motion in RA*cos(DEdeg) (pos.pm;pos.eq.ra)
e_pmRA 2.36 mas/yr Standard error on pmRA (stat.error;pos.pm;pos.eq.ra)
pmDE -54.96 mas/yr Proper motion in Declination (pos.pm;pos.eq.dec)
e_pmDE 1.77 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_pm1   [1/3] Reference for proper motion (Note 5)   (meta.ref;pos.frame)
GLon196.77346243 deg Galactic longitude (Note 6)   (pos.galactic.lon)
GLat 4.45261831 deg Galactic latitude (Note 6)   (pos.galactic.lat)
Dist 33.29 pc Heliocentric distance (Note 7)   (pos.distance)
e_Dist 7.5 % Distance error expressed as percentage (Note 8)   (stat.error)
pmGLon 55.24 mas/yr Proper motion in GLon*cos(GLat) (pos.pm)
pmGLat -12.64 mas/yr Proper motion in GLat (pos.pm)
X -31.8 pc Heliocentric distance towards Gal. center (pos.distance)
Y -9.6 pc Heliocentric distance towards Gal. rotation (pos.distance)
Z 2.6 pc Heliocentric distance towards N. Gal. Pole (pos.distance)
RGal7432 pc Galactocentric distance (Note 9)   (pos.distance;pos.galactocentric)
vT 8.9 km/s Transverse velocity (phys.veloc)
SpTypeA1.5IV  Spectral type (MK, HD, or other) (src.spType)
Tc 31   ]0/140[ Temperature class codified (Note 10)   (src.spType)
Lc4   [1/6] Luminosity class codified (Note 11)   (src.class.luminosity)
RV -12.63 km/s Radial velocity (spect.dopplerVeloc;pos.heliocentric)
e_RV 0.02 km/s Standard error on RV (Note 12)   (stat.error)
q_RVA   [ABCD] Quality flag on RV (Note 13)   (meta.code.qual)
[Fe/H]-0.28 [Sun] Iron abundance (phys.abund.Fe)
e_[Fe/H] 0.04 [Sun] Standard error on [Fe/H] (Note 14)   (stat.error;phys.abund.Fe)
q_[Fe/H]A   [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 14.4 km/s Heliocentric velocity towards Gal. center (spect.dopplerVeloc;pos.heliocentric)
V -4.8 km/s Heliocentric velocity towards Gal. rotation (phys.veloc.rotat;pos.heliocentric)
W -3.0 km/s Heliocentric velocity towards N. Gal. Pole (spect.dopplerVeloc;em.IR.8-15um)
UVW 15.5 km/s Total heliocentric velocity (phys.veloc)
Dmin 19.24 pc Minimum distance at solar encounter (Note 16)   (pos.distance)
Tmin 1717 kyr Timing of Dmin, in thousands of years (Note 17)   (time.epoch)
e 0.1748   Total orbital eccentricity (Note 18)   (src.orbital.eccentricity)
phi 54.8 deg [-180/180] Pericenter position angle (Note 18)   (src.orbital.periastron)
a 8438 pc Semi-major axis of orbit (Note 18)   (phys.size.smajAxis)
b 8308 pc Semi-minor axis of orbit (Note 18)   (phys.size.sminAxis)
c 1475 pc Focus-to-center distance of orbit (=a.e) (Note 18)   (pos.distance;src.orbital)
L 8180 deg Semilatus rectum of orbit (Note 18)   (src.orbital)
Rmin6963 pc Orbital radius at pericenter (Note 18)   (pos.distance;src.orbital)
Rmax 9913 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 1.929 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 1.92 mag Hpmag at maximum (5th percentile) (phot.mag;em.opt.V)
Hpmin 1.94 mag Hpmag at minimum (95th percentile) (phot.mag;em.IR.H)
Per  d Variability period (src.var)
Hvar  mag [CDMPRU] Variability type (Note 21)   (meta.code;src.var)
Umag  mag Apparent magnitude in Johnson U (phot.mag;em.opt.U)
Bmag 1.931 mag Apparent magnitude in Johnson B (phot.mag;em.opt.B)
Vmag 1.93 mag Apparent magnitude in Johnson V (phot.mag;em.opt.V)
Rmag  mag Apparent magnitude in R (phot.mag;em.opt.R)
Imag 1.984 mag Apparent magnitude in I (phot.mag;em.opt.I)
Jmag 1.729 mag J selected default magnitude (Note 22)   (phot.mag;em.IR.J)
e_Jmag 0.244 mag J total magnitude uncertainty (Note 22)   (stat.error;phot.mag;em.IR.J)
Hmag 1.836 mag H selected default magnitude (Note 22)   (phot.mag;em.IR.H)
e_Hmag 0.202 mag H total magnitude uncertainty (Note 22)   (stat.error;phot.mag;em.IR.H)
Kmag 1.917 mag K selected default magnitude (Note 22)   (phot.mag;em.IR.K)
e_Kmag 0.220 mag K total magnitude uncertainty (Note 22)   (stat.error;phot.mag;em.IR.K)
2MASS06374273+1623574  2MASS source designation (linked to details from 2MASS-PSC catalog) (Note 22)   (meta.id.cross)
q2MDCD  JHK photometric quality flag (Note 22)   (meta.code.qual;phot)
B-V 0.001 mag Johnson B-V color index (phot.color;em.opt.B;em.opt.V)
e_B-V 0.005 mag Standard error on B-V (stat.error;phot.color;em.opt.B)
V-I 0.04 mag Color index in Cousins' system (phot.color;em.opt.V;em.opt.I)
e_V-I 0.00 mag Standard error on V-I (stat.error;phot.color;em.opt.V)
HpMag-0.683 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-0.68 mag Absolute Magnitude in Johnson B (Note 23)   (phys.magAbs;em.opt.B)
VMag-0.68 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-0.63 mag Absolute Magnitude in I (Note 23)   (phys.magAbs;em.opt.I)
JMag-0.88 mag Absolute Magnitude J (Note 23)   (phys.magAbs;em.IR.J)
HMag-0.78 mag Absolute Magnitude H (Note 23)   (phys.magAbs;em.IR.H)
KMag -0.69 mag Absolute Magnitude K (Note 23)   (phys.magAbs;em.IR.K)
Lum 184.76 Lsun Stellar luminosity (Note 23)   (phys.luminosity)
magmin 0.74 mag Apparent magnitude V at Tmin (main.dat) (phot.mag)
HD 47105   Henry Draper catalog identifier (meta.id)
CstGem  Constellation membership (meta.code.member)
Atlas 179  Millennium Star Atlas page number (meta.bib.page)
Coords06377n1640  RA, DE in compact format; n = + ; s = - (meta.id)
Name24 Gamma Geminorum (Alhena)  Star name(s) (meta.id)
GrpName   Cluster or Association name(s) (linked to Group characteristics ) (meta.id.parent)
CompIDCCDM J06377+1624  Reference for Comp (main.dat) (meta.id)
rSpType2009A&A...501..297Z  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]003  Reference(s) for [Fe/H] (main.dat) (meta.ref)
  
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