Lambda Leporis

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Lambda Leporis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Lepus
Right ascension 05h 19m 34.52405s[1]
Declination −13° 10′ 36.4408″[1]
Apparent magnitude (V) +4.286±0.005[2]
Spectral type B0.5 V[2]
U−B color index −1.010±0.005[2]
B−V color index −0.273±0.015[2]
Radial velocity (Rv)+20.2±2.7[3] km/s
Proper motion (μ) RA: −3.30[1] mas/yr
Dec.: −4.91[1] mas/yr
Parallax (π)3.83 ± 0.24[1] mas
Distance850 ± 50 ly
(260 ± 20 pc)
Absolute magnitude (MV)−2.77±0.15[2]
Mass15.0±3.5 M
Radius4.5±0.3 R
Luminosity15,488 L
Surface gravity (log g)4.30±0.05 cgs
Temperature30,400±300 K
Metallicity [Fe/H]−0.15 dex
Rotational velocity (v sin i)30±1 km/s
Other designations
λ Lep, 6 Lep, BD−13° 1127, HD 34816, HIP 24845, HR 1756, SAO 150340[4]
Database references

Lambda Leporis (λ Leporis) is a solitary,[5] blue-white hued star in the southern constellation of Lepus. It is visible to the naked eye with an apparent visual magnitude of +4.29.[2] Based upon an annual parallax shift of 3.83 mas,[1] it is estimated to lie roughly 850 light years from the Sun. Relative to its neighbors, this star has a peculiar velocity of 16.3±2.8 km/s.[3]

This is a massive, B-type main-sequence star with a corrected stellar classification of B0.5 V. It has around 15 times the mass of the Sun and 4.5 times the Sun's radius. The star is radiating 15,488 times the Sun's luminosity from its photosphere at an effective temperature of 30,400 K.[2]


  1. ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. ^ a b c d e f g h Nieva, M.-F. (February 2013), "Temperature, gravity, and bolometric correction scales for non-supergiant OB stars", Astronomy & Astrophysics, 550: A26, arXiv:1212.0928, Bibcode:2013A&A...550A..26N, doi:10.1051/0004-6361/201219677.
  3. ^ a b Bobylev, V. V.; Bajkova, A. T. (August 2013), "Galactic kinematics from a sample of young massive stars", Astronomy Letters, 39 (8): 532–549, arXiv:1307.1677, Bibcode:2013AstL...39..532B, doi:10.1134/S106377371308001X.
  4. ^ "lam Lep". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-08-16.
  5. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.