89 Leonis

89 Leonis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Leo
Right ascension 11h 34m 21.94862s[1]
Declination +03° 03′ 36.5931″[1]
Apparent magnitude (V) 5.70[2]
Characteristics
Spectral type F5.5V[3]
B−V color index 0.480±0.005[4]
Astrometry
Radial velocity (Rv)+4.775±0.0006[5] km/s
Proper motion (μ) RA: −183.582[1] mas/yr
Dec.: −102.903[1] mas/yr
Parallax (π)36.9527 ± 0.0817 mas[1]
Distance88.3 ± 0.2 ly
(27.06 ± 0.06 pc)
Absolute magnitude (MV)3.53[2]
Details
Mass1.29[2] M☉
Radius1.38±0.04[1] R☉
Luminosity2.990+0.009
−0.010[1] L☉
Surface gravity (log g)4.22[3] cgs
Temperature6,461+93
−90[1] K
Metallicity [Fe/H]−0.04[3] dex
Rotational velocity (v sin i)15.1[2] km/s
Age1.13[2] Gyr
Other designations
89 Leonis, BD+03°2521, FK5 2924, GJ 9367, HD 100563, HIP 56445, HR 4455, SAO 118929[6]
Database references
SIMBADdata

89 Leonis is a single[7] star in the equatorial constellation of Leo, the lion. It has a yellow-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 5.70.[2] Based upon parallax measurements, it is located at a distance of 88 light years from the Sun. The star has a high proper motion[8] and is moving further away with a radial velocity of +4.8 km/s.[5] It is a candidate member of the TW Hydrae stellar kinematic group.[8]

This is an F-type main-sequence star with a stellar classification of F5.5V.[3] It is an estimated 1.13[2] billion years old and is spinning with a rotation period of 7.73 days.[9] It shows evidence of a short-term activity cycle lasting 222.5±3.3 days.[9] The star has 1.3[2] times the mass of the Sun and 1.4[1] times the Sun's radius. It is radiating three[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,461 K.[1]

  1. ^ a b c d e f g h i j k Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Earle2017 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Soubiran2018 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference nakajima2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Mittag2019 was invoked but never defined (see the help page).