Beta Lupi

Beta Lupi
Location of β Lupus (circled)
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]
Distance383 ± 8 ly
(117 ± 2 pc)
Absolute magnitude (MV)−3.3[6]
Details
Mass8.8±0.2[7] M☉
Radius6.6[8] R☉
Luminosity10,000[6] L☉
Surface gravity (log g)3.76[6] cgs
Temperature24,090[9] K
Metallicity [Fe/H]−0.35±0.11[5] dex
Rotational velocity (v sin i)92[3] km/s
Age24.6±2.7[7] Myr
Other designations
Kekouan, β Lup, CD−42° 9853, FK5 552, HD 132058, HIP 73273, HR 5571, SAO 225335[10]
Database references
SIMBADdata

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]

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