Xi Leonis

ξ Leonis
Location of ξ Leonis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Leo
Right ascension 09h 31m 56.74097s[1]
Declination +11° 17′ 59.3585″[1]
Apparent magnitude (V) 4.97[2]
Characteristics
Evolutionary stage red clump[3]
Spectral type K0 III[4]
U−B color index +0.88[2]
B−V color index +1.04[2]
Variable type suspected[5]
Astrometry
Radial velocity (Rv)34.85±0.26[6] km/s
Proper motion (μ) RA: −101.446[1] mas/yr
Dec.: −82.543[1] mas/yr
Parallax (π)14.2602 ± 0.1106 mas[1]
Distance229 ± 2 ly
(70.1 ± 0.5 pc)
Absolute magnitude (MV)0.663[3]
Details
Mass2.8[1] M☉
Radius12[7] R☉
Luminosity60[7] L☉
Surface gravity (log g)2.7[7] cgs
Temperature4,688[7] K
Metallicity [Fe/H]−0.17[7] dex
Rotational velocity (v sin i)1.0[8] km/s
Age3.89±2.03[3] Gyr
Other designations
ξ Leo, 5 Leo, BD+11°2053, HD 82395, HIP 46771, HR 3782, SAO 98627[9]
Database references
SIMBADdata

Xi Leonis (ξ Leo, ξ Leonis) is a solitary star in the zodiac constellation of Leo. It has an apparent visual magnitude of 5.0 and is faintly visible to the naked eye. The distance to this star, as determined by parallax measurements, is roughly 229 light years.

This is an evolved, K-type giant star with a stellar classification of K0 III.[4] At an age of around four billion years, it has expanded to 12 times the radius of the Sun and shines with 60 times the Sun's luminosity. The effective temperature of the star's outer atmosphere is 4,688.[7] In the General Catalogue of Variable Stars, it is listed as a suspected variable star based on a 1929 paper.[5]

  1. ^ a b c d e f Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Paczynski1999 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Soubiran2008 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Eggen1962 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference cgcvs2007 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Famaey2005 was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference Massarotti2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Glebocki2005 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).