Nu Leporis

Nu Leporis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Lepus
Right ascension 05h 19m 59.02275s[1]
Declination −12° 18′ 56.1139″[1]
Apparent magnitude (V) 5.29[2]
Characteristics
Spectral type B7/8 V[3] or B7 IVnn[4]
U−B color index −0.41[2]
B−V color index −0.12[2]
Astrometry
Radial velocity (Rv)+16.0±7.4[5] km/s
Proper motion (μ) RA: −13.32[1] mas/yr
Dec.: +7.18[1] mas/yr
Parallax (π)9.78 ± 0.37 mas[1]
Distance330 ± 10 ly
(102 ± 4 pc)
Absolute magnitude (MV)+0.25[6]
Details
Mass3.28±0.05[7] M☉
Radius3.0[8] R☉
Luminosity138[7] L☉
Temperature12,417[7] K
Rotational velocity (v sin i)285[9] km/s
Other designations
ν Lep, 7 Lep, BD−12° 1132, FK5 2380, GC 6538, HD 34863, HIP 24873, HR 1757, SAO 150345[10]
Database references
SIMBADdata

Nu Leporis, Latinized from ν Leporis, is a probable astrometric binary[11] star system in the constellation Lepus. It is visible to the naked eye as a faint star with an apparent visual magnitude of 5.29.[2] Based upon an annual parallax shift of 7.70 mas as seen from the Earth,[1] it is 420 light years from the Sun.

The visible component is a B-type star with an estimated 3.3[7] times the mass of the Sun. Lesh (1968) gave a stellar classification of B7 IVnn,[4] which would indicate this is a somewhat evolved subgiant star. The 'nn' notation indicates especially "nebulous" absorption lines caused by rapid rotation. Houk and Smith-Moore (1978) listed it as B7/8 V,[3] suggesting this is instead a B-type main sequence star that has not yet consumed all the hydrogen at its core.

Nu Leporis is spinning rapidly with a projected rotational velocity of 285 km/s.[9] The star has a radius about three[8] times that of the Sun and is radiating 138 times the Sun's luminosity from its photosphere at an effective temperature of 12,417 K.[7]

  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 Crawford1971 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Lesh1968 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Abt2002 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).