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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=20841
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ColumnValue  Explain   (UCD)
_RAJ200004 28 39.7407690 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+15 52 15.174103 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195004 25 48.2264731 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+15 45 41.830465 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon180.3473163596 deg Galactic longitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lon)
_Glat-22.0105938340 deg Galactic latitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lat)
20841recno 20841  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

HIP 20894  (i) Hipparcos identifier (linked to details from HIP catalogs) (meta.id;meta.main)
CompA  Component(s) (Note 1)   (meta.code.multip)
ClassesV*,dS*,IR,X,**,*,*iC,UV,SB*  SIMBAD classifications (comma separated) (Note 2)   (src.class)
Gr1   Cluster or Association membership(s) (Note 3)   (meta.code.member)
RAJ2000067.16531227 deg (i) Right ascension (ICRS, Epoch=J1991.25) (pos.eq.ra;meta.main)
e_RAJ2000 0.41 mas Standard error on RA*cos(DEdeg) (stat.error;pos.eq.ra)
DEJ2000+15.87094681 deg (i) Declination (ICRS, Epoch=J1991.25) (pos.eq.dec;meta.main)
e_DEJ2000 0.22 mas Standard error on DE (stat.error;pos.eq.dec)
Plx 21.69 mas Trigonometric parallax (pos.parallax.trig)
e_Plx 0.46 mas Standard error on Plx (stat.error;pos.parallax)
pmRA 108.54 mas/yr Proper motion in RA*cos(DEdeg) (pos.pm;pos.eq.ra)
e_pmRA 0.51 mas/yr Standard error on pmRA (stat.error;pos.pm;pos.eq.ra)
pmDE -26.79 mas/yr Proper motion in Declination (pos.pm;pos.eq.dec)
e_pmDE 0.34 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)
GLon180.34731929 deg Galactic longitude (Note 6)   (pos.galactic.lon)
GLat-22.01059377 deg Galactic latitude (Note 6)   (pos.galactic.lat)
Dist 46.08 pc Heliocentric distance (Note 7)   (pos.distance)
e_Dist 2.1 % Distance error expressed as percentage (Note 8)   (stat.error)
pmGLon 88.86 mas/yr Proper motion in GLon*cos(GLat) (pos.pm)
pmGLat 67.85 mas/yr Proper motion in GLat (pos.pm)
X -42.7 pc Heliocentric distance towards Gal. center (pos.distance)
Y -0.3 pc Heliocentric distance towards Gal. rotation (pos.distance)
Z -17.3 pc Heliocentric distance towards N. Gal. Pole (pos.distance)
RGal7443 pc Galactocentric distance (Note 9)   (pos.distance;pos.galactocentric)
vT 24.4 km/s Transverse velocity (phys.veloc)
SpTypeA7III  Spectral type (MK, HD, or other) (src.spType)
Tc 37   ]0/140[ Temperature class codified (Note 10)   (src.spType)
Lc3   [1/6] Luminosity class codified (Note 11)   (src.class.luminosity)
RV 38.90 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] 0.01 [Sun] Iron abundance (phys.abund.Fe)
e_[Fe/H] 9.99 [Sun] Standard error on [Fe/H] (Note 14)   (stat.error;phys.abund.Fe)
q_[Fe/H]C   [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 -41.5 km/s Heliocentric velocity towards Gal. center (spect.dopplerVeloc;pos.heliocentric)
V -19.7 km/s Heliocentric velocity towards Gal. rotation (phys.veloc.rotat;pos.heliocentric)
W -0.8 km/s Heliocentric velocity towards N. Gal. Pole (spect.dopplerVeloc;em.IR.8-15um)
UVW 45.9 km/s Total heliocentric velocity (phys.veloc)
Dmin 24.50 pc Minimum distance at solar encounter (Note 16)   (pos.distance)
Tmin -831 kyr Timing of Dmin, in thousands of years (Note 17)   (time.epoch)
e 0.1352   Total orbital eccentricity (Note 18)   (src.orbital.eccentricity)
phi-107.8 deg [-180/180] Pericenter position angle (Note 18)   (src.orbital.periastron)
a 7267 pc Semi-major axis of orbit (Note 18)   (phys.size.smajAxis)
b 7201 pc Semi-minor axis of orbit (Note 18)   (phys.size.sminAxis)
c 983 pc Focus-to-center distance of orbit (=a.e) (Note 18)   (pos.distance;src.orbital)
L 7134 deg Semilatus rectum of orbit (Note 18)   (src.orbital)
Rmin6285 pc Orbital radius at pericenter (Note 18)   (pos.distance;src.orbital)
Rmax 8250 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 3.460 mag Median magnitude in Hipparcos system (phot.mag;em.opt.V)
e_Hpmag 0.002 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 3.45 mag Hpmag at maximum (5th percentile) (phot.mag;em.opt.V)
Hpmin 3.47 mag Hpmag at minimum (95th percentile) (phot.mag;em.IR.H)
Per  d Variability period (src.var)
HvarM mag [CDMPRU] Variability type (Note 21)   (meta.code;src.var)
Umag  mag Apparent magnitude in Johnson U (phot.mag;em.opt.U)
Bmag 3.579 mag Apparent magnitude in Johnson B (phot.mag;em.opt.B)
Vmag 3.40 mag Apparent magnitude in Johnson V (phot.mag;em.opt.V)
Rmag  mag Apparent magnitude in R (phot.mag;em.opt.R)
Imag 3.219 mag Apparent magnitude in I (phot.mag;em.opt.I)
Jmag 2.994 mag J selected default magnitude (Note 22)   (phot.mag;em.IR.J)
e_Jmag 0.206 mag J total magnitude uncertainty (Note 22)   (stat.error;phot.mag;em.IR.J)
Hmag 2.997 mag H selected default magnitude (Note 22)   (phot.mag;em.IR.H)
e_Hmag 0.212 mag H total magnitude uncertainty (Note 22)   (stat.error;phot.mag;em.IR.H)
Kmag 2.880 mag K selected default magnitude (Note 22)   (phot.mag;em.IR.K)
e_Kmag 0.264 mag K total magnitude uncertainty (Note 22)   (stat.error;phot.mag;em.IR.K)
2MASS04283971+1552151  2MASS source designation (linked to details from 2MASS-PSC catalog) (Note 22)   (meta.id.cross)
q2MCCD  JHK photometric quality flag (Note 22)   (meta.code.qual;phot)
B-V 0.179 mag Johnson B-V color index (phot.color;em.opt.B;em.opt.V)
e_B-V 0.004 mag Standard error on B-V (stat.error;phot.color;em.opt.B)
V-I 0.21 mag Color index in Cousins' system (phot.color;em.opt.V;em.opt.I)
e_V-I 0.03 mag Standard error on V-I (stat.error;phot.color;em.opt.V)
HpMag 0.142 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 0.26 mag Absolute Magnitude in Johnson B (Note 23)   (phys.magAbs;em.opt.B)
VMag 0.08 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-0.10 mag Absolute Magnitude in I (Note 23)   (phys.magAbs;em.opt.I)
JMag-0.32 mag Absolute Magnitude J (Note 23)   (phys.magAbs;em.IR.J)
HMag-0.32 mag Absolute Magnitude H (Note 23)   (phys.magAbs;em.IR.H)
KMag -0.44 mag Absolute Magnitude K (Note 23)   (phys.magAbs;em.IR.K)
Lum 77.23 Lsun Stellar luminosity (Note 23)   (phys.luminosity)
magmin 2.03 mag Apparent magnitude V at Tmin (main.dat) (phot.mag)
HD 28319   Henry Draper catalog identifier (meta.id)
CstTau  Constellation membership (meta.code.member)
Atlas 185  Millennium Star Atlas page number (meta.bib.page)
Coords04287n1587  RA, DE in compact format; n = + ; s = - (meta.id)
Name78 Theta-2 Tauri  Star name(s) (meta.id)
GrpNameHyades  Cluster or Association name(s) (linked to Group characteristics ) (meta.id.parent)
CompIDCCDM J04286+1554  Reference for Comp (main.dat) (meta.id)
rSpType1989AJ.....98.1049G  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]201  Reference(s) for [Fe/H] (main.dat) (meta.ref)
  
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