Chi Leonis

χ Leonis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Leo
Right ascension 11h 05m 01.02754s[1]
Declination +07° 20′ 09.6235″[1]
Apparent magnitude (V) 4.63[2]
Characteristics
Spectral type F2III-IVv[3]
U−B color index +0.06[2]
B−V color index +0.33[2]
Astrometry
Radial velocity (Rv)+4.7[4] km/s
Proper motion (μ) RA: −344.28[1] mas/yr
Dec.: −47.65[1] mas/yr
Parallax (π)34.49 ± 0.20 mas[1]
Distance94.6 ± 0.5 ly
(29.0 ± 0.2 pc)
Absolute magnitude (MV)+2.31[5]
Details
Mass1.62[6] M☉
Radius1.99[7] R☉
Luminosity9.9[5] L☉
Surface gravity (log g)4.02[6] cgs
Temperature7022±80[6] K
Metallicity [Fe/H]+0.03[6] dex
Rotational velocity (v sin i)25±1[3] km/s
Age1.40[6] Gyr
Other designations
χ Leo, 63 Leo, BD+08°2455, FK5 418, HD 96097, HIP 54182, HR 4310, SAO 118648[8]
Database references
SIMBADdata

Chi Leonis, Latinized from χ Leonis, is a double star in the constellation Leo. It is visible to the naked eye with an apparent visual magnitude of 4.63.[2] The distance to this star, as determined using parallax measurements,[1] is around 95 light years. It has an annual proper motion of 346 mas.[9]

This is most likely a binary star system.[10] The primary component is an evolved, F-type giant star with a stellar classification of F2III-IVv.[3] It has an estimated 162%[6] of the Sun's mass and nearly twice the Sun's radius.[7] The companion is a magnitude 11.0 star at an angular separation of 4.1″ along a position angle of 264°, as of 1990.[11]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcrv1953 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Rachford2009 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Lepine2005 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).