Mu Lupi
Mu Lupi (μ Lup) is a system of three or four stars in the southern constellation of Lupus. It is visible to the naked eye with an apparent visual magnitude of 4.29 and lies roughly 340 light-years from the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 18m 32.02296s |
| Declination | −47° 52′ 30.9957″ |
| Apparent magnitude (V) | 4.29 |
| Characteristics | |
| Spectral type | B8 Ve |
| U−B color index | −0.41 |
| B−V color index | −0.03 |
| Astrometry | |
| Radial velocity (Rv) | +14.90±1.78 km/s |
| Proper motion (μ) | RA: −29.59 mas/yr Dec.: −35.07 mas/yr |
| Parallax (π) | 9.72 ± 0.71 mas |
| Distance | 340 ± 20 ly (103 ± 8 pc) |
| Absolute magnitude (MV) | −0.57 |
| Details | |
| Mass | 4.42±0.20 M☉ |
| Luminosity | 603 L☉ |
| Surface gravity (log g) | 3.80±0.10 cgs |
| Temperature | 13,470±500 K |
| Rotational velocity (v sin i) | 280±20 km/s |
| Age | 112 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Two of the components of this system, A and B, form a pair with an angular separation of 1.1 arcseconds. As of 2014, no orbit has been published. Component C lies at an angular separation of 22.6 arcseconds from the AB pair, and may be a common proper motion companion. It is an A-type main-sequence star with a classification of A2 V. A fourth component at an angular separation of 6.15 arcseconds from component A, may be a brown dwarf.
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