59 Leonis

59 Leonis
Observation data
Epoch J2000      Equinox J2000
Constellation Leo
Right ascension 11h 00m 44.80142s[1]
Declination +06° 06′ 05.2093″[1]
Apparent magnitude (V) 4.98[2]
Characteristics
Spectral type A5 III[3] or A6 IV[4]
B−V color index 0.166±0.005[2]
Astrometry
Radial velocity (Rv)−11.7±1.3[5] km/s
Proper motion (μ) RA: −52.73[1] mas/yr
Dec.: −23.23[1] mas/yr
Parallax (π)21.57 ± 0.26 mas[1]
Distance151 ± 2 ly
(46.4 ± 0.6 pc)
Absolute magnitude (MV)1.65[2]
Details
Mass1.73[6] M☉
Luminosity18.27[2] L☉
Surface gravity (log g)4.15±0.14[6] cgs
Temperature8,277±281[6] K
Rotational velocity (v sin i)82[7] km/s
Age332[6] Myr
Other designations
c Leo, 59 Leo, BD+06° 2384, HD 95382, HIP 53824, HR 4294, SAO 118615, WDS J11007+0606A[8]
Database references
SIMBADdata

59 Leonis, or c Leonis, is a single[9] white-hued star in the southern part of the constellation of Leo. It is north of 58 Leonis, south of Chi Leonis, and well east of the bright star Regulus. Its apparent visual magnitude is 4.98, so it is dimly visible to the naked eye, 0.21 degree south of the ecliptic.[2] The annual parallax shift as seen from Earth's orbit is 21.57±0.26 mas,[1] giving a distance estimate of about 151 light years. The star is moving closer to the Sun with a heliocentric radial velocity of −12 km/s.[5]

Cowley et al. (1969) assigned 59 Leonis a stellar classification of A5 III,[3] matching the spectrum of an A-type giant star, but Gray and Garrison (1989) found a class of A6 IV,[4] suggesting it is a subgiant star. Hauck (1986) noted that the star is classified as a giant, but the colors match a dwarf star and it had been previously classified as F3 V.[10] It is an estimated 332[6] million years old with a high rate of spin, showing a projected rotational velocity of 82 km/s.[7] The star has around 1.73[6] times the mass of the Sun and is radiating 18[2] times the Sun's luminosity from its photosphere at an effective temperature of about 8,277 K.[6]

  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 e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gray1989 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference David2015 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Royer2002 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 deRosa2014 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Hauck1986 was invoked but never defined (see the help page).