Psi Leonis

ψ Leonis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Leo
Right ascension 09h 43m 43.90499s[1]
Declination +14° 01′ 18.1033″[1]
Apparent magnitude (V) 5.38[2]
Characteristics
Spectral type M2 IIIab[3]
U−B color index +1.95[2]
B−V color index +1.60[2]
Astrometry
Radial velocity (Rv)10.31±0.41[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)−1.39[5]
Details
Luminosity903[6] L☉
Temperature3,756[6] K
Other designations
ψ Leo, 16 Leo, BD+14°2136, FK5 1252, HD 84194, HIP 47723, HR 3866, SAO 98733[7]
Database references
SIMBADdata

ψ Leonis (Latinised as Psi Leonis, abbreviated to ψ Leo or psi Leo), is a solitary[3] star located in the zodiac constellation of Leo, to the east-northeast of Regulus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.38.[2] Based upon stellar parallax measurements,[1] it is located around 95 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an absorption factor of 0.3 due to interstellar dust.[5]

Psi Leonis is an evolved red giant star with a stellar classification of M2 IIIab.[3] It shines with a luminosity over 900 times that of the Sun from a relatively cool outer atmosphere that has an effective temperature of 3,756.[6] It is a suspected variable star with a measured brightness variation of 0m.018.[8] Psi Leonis has a magnitude 11.63 visual companion at an angular separation of 281.60 arcseconds along a position angle of 139°, as of 2000.[9]

  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 Eggleton2008 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference aaa498_2_627 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Famaey2005 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Percy1994 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).