Global InformationNu Leporis information
| 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] |
| Distance | 330 ± 10 ly (102 ± 4 pc) |
| Absolute magnitude (MV) | +0.25[6] |
| Details | |
| Mass | 3.28±0.05[7] M☉ |
| Radius | 3.0[8] R☉ |
| Luminosity | 138[7] L☉ |
| Temperature | 12,417[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 | |
| SIMBAD | data |
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]
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