Beta Lupi
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lupus |
| Right ascension | 14h 58m 31.92536s |
| Declination | −43° 08′ 02.2699″ |
| Apparent magnitude (V) | 2.68 |
| Characteristics | |
| Spectral type | B2 III |
| U−B color index | −0.902 |
| B−V color index | −0.226 |
| Variable type | β Cep |
| Astrometry | |
| Radial velocity (Rv) | +0.1±1.0 km/s |
| Proper motion (μ) | RA: −35.78 mas/yr Dec.: −39.83 mas/yr |
| Parallax (π) | 8.52±0.18 mas |
| Distance | 383 ± 8 ly (117 ± 2 pc) |
| Absolute magnitude (MV) | −3.3 |
| Details | |
| Mass | 8.8±0.2 M☉ |
| Radius | 6.6 R☉ |
| Luminosity | 10,000 L☉ |
| Surface gravity (log g) | 3.76 cgs |
| Temperature | 24,090 K |
| Metallicity [Fe/H] | −0.35±0.11 dex |
| Rotational velocity (v sin i) | 92 km/s |
| Age | 24.6±2.7 Myr |
| Other designations | |
| Kekouan, β Lup, CD−42°9853, FK5 552, HD 132058, HIP 73273, HR 5571, SAO 225335 | |
| Database references | |
| SIMBAD | data |
Beta Lupi (Latinized from β Lupi) or Kekouan (/ˈkɛkwɑːn/), is a star in the southern constellation of Lupus. It has an apparent visual magnitude of 2.7, making it readily visible to the naked eye. Based upon parallax measurements, this star is located at a distance of about 383 light-years (117 parsecs) from Earth.