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Beta Lupi
Star in the constellation of Lupus / From Wikipedia, the free encyclopedia
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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,[2] 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.[2]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Lupus |
Right ascension | 14h 58m 31.92536s[1] |
Declination | −43° 08′ 02.2699″[1] |
Apparent magnitude (V) | 2.68[2] |
Characteristics | |
Spectral type | B2 III[3] |
U−B color index | −0.902[4] |
B−V color index | −0.226[4] |
Variable type | β Cep[5] |
Astrometry | |
Radial velocity (Rv) | +0.1 ± 1.0[3] km/s |
Proper motion (μ) | RA: −35.78[1] mas/yr Dec.: −39.83[1] mas/yr |
Parallax (π) | 8.52 ± 0.18 mas[1] |
Distance | 383 ± 8 ly (117 ± 2 pc) |
Absolute magnitude (MV) | −3.3[6] |
Details | |
Mass | 8.8±0.2[7] M☉ |
Radius | 6.6[8] R☉ |
Luminosity | 10,000[6] L☉ |
Surface gravity (log g) | 3.76[6] cgs |
Temperature | 24,090[9] K |
Metallicity [Fe/H] | −0.35±0.11[5] dex |
Rotational velocity (v sin i) | 92[3] km/s |
Age | 24.6±2.7[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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