  | |
| Observation data EpochJ2000.0 EquinoxJ2000.0 | |
|---|---|
| Constellation | Lepus |
| Right ascension | 05h 12m 55.90296s[1] |
| Declination | −16° 12′ 19.6686″[1] |
| Apparent magnitude (V) | 3.259[2] |
| Characteristics | |
| Spectral type | B9 IV:HgMn[3] |
| U−Bcolor index | −0.357[2] |
| B−Vcolor index | −0.096[2] |
| Variable type | Suspectedα2 CVn[4] |
| Astrometry | |
| Radial velocity (Rv) | +27.7[5] km/s |
| Proper motion (μ) | RA: +45.702[1]mas/yr Dec.: −16.017[1]mas/yr |
| Parallax (π) | 19.1775±0.3265 mas[1] |
| Distance | 170 ± 3 ly (52.1 ± 0.9 pc) |
| Absolute magnitude (MV) | −0.49[6] |
| Details | |
| Mass | 3.45[7] M☉ |
| Radius | 3.39±0.16[4] R☉ |
| Luminosity | 251[6] L☉ |
| Surface gravity (log g) | 3.85[8] cgs |
| Temperature | 12,820±436[7] K |
| Metallicity [Fe/H] | −0.05[8] dex |
| Rotational velocity (v sin i) | 16±0.5[4] km/s |
| Age | 125[7] Myr |
| Other designations | |
| μ Lep,5 Lep,BD−16°1072,FK5 1144,HD 33904,HIP 24305,HR 1702,SAO 150237[9] | |
| Database references | |
| SIMBAD | data |
Mu Leporis,Latinized from μ Leporis, is astar in the southernconstellation ofLepus. Theapparent visual magnitude is 3.259, making the star visible to the naked eye at night from the southern hemisphere.Parallax measurements yield an estimated distance of 170light-years (52parsecs) from theEarth. It is moving further from the Sun with aradial velocity of +27.7 km/s.
Thestellar classification of this star is B9 IV:HgMn,[3] although the ':' indicates an uncertain spectral value. Theluminosity class of IV indicates that this is asubgiant that has exhausted the hydrogen at its core and it is in the process ofevolving into agiant star. At present it has about 3.4 times theSun's radius,[4] 3.45[7] times themass of the Sun, and is radiating 251[6] times theSun's luminosity from itsphotosphere at aneffective temperature of 12,800 K.[8]
Mu Leporis is a suspectedAlpha² Canum Venaticorum variable with a period of 2.933 days.[11] Thestellar spectrum of this star shows overabundances of mercury and manganese, as indicated by the HgMn in the stellar class.[4] X-ray emission has been detected coming from a location at anangular separation of 0.93 arcseconds from this star. At the estimated distance of Mu Leporis, this equals a projected distance of 52 Astronomical Units. The source may be a stellar companion: either a star that has not yet reached themain sequence or a small, low-temperature star. The X-ray luminosity of this object is(4.4 ± 0.1) × 1029 erg s−1.[12]
