Lambda Leporis

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]
Characteristics
Spectral type B0.5 V[2]
U−B color index −1.010±0.005[2]
B−V color index −0.273±0.015[2]
Astrometry
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 mas[1]
Distance850 ± 50 ly
(260 ± 20 pc)
Absolute magnitude (MV)−2.77±0.15[2]
Details
Mass15.0±3.5[4] M☉
Radius4.5±0.3[4] R☉
Luminosity15,488[4] L☉
Surface gravity (log g)4.30±0.05[2] cgs
Temperature30,400±300[2] K
Metallicity [Fe/H]−0.15[4] dex
Rotational velocity (v sin i)30±1[2] km/s
Age8±2[5] Myr
Other designations
λ Lep, 6 Lep, BD−13° 1127, HD 34816, HIP 24845, HR 1756, SAO 150340[6]
Database references
SIMBADdata

Lambda Leporis, which is the Latinized form of λ Leporis, is a solitary,[7] 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] It is a member of the Orion OB1 association (Ori OB1),[8] and it has been identified as a high-velocity runaway star.[9]

This is a massive, B-type main-sequence star with a corrected stellar classification of B0.5 V. It is an estimated eight[5] million years old and is spinning with a projected rotational velocity of 30 km/s.[2] This star has around 15 times the mass of the Sun and 4.5 times the Sun's radius. It 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 Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j k Cite error: The named reference Nieva2013 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Bobylev2013 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Nieva2014 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Tetzlaff2011 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. ^ Cite error: The named reference Alexeeva2020 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Proffitt2001 was invoked but never defined (see the help page).