Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Columba
Right ascension 05h 39m 38.94103s[1]
Declination −34° 04′ 26.7950″[1]
Apparent magnitude (V) 2.645[2]
Characteristics
Spectral type B7 IV[3]
U−B color index −0.44[2]
B−V color index −0.125[2]
R−I color index −0.09[4]
Astrometry
Radial velocity (Rv) +35.0[5] km/s
Proper motion (μ) RA: −1.58[1] mas/yr
Dec.: −24.82[1] mas/yr
Parallax (π) 12.48 ± 0.36[1] mas
Distance 261 ± 8 ly
(80 ± 2 pc)
Absolute magnitude (MV) −1.9
Details
Mass 4.5[6] M
Radius 5.8[7] R
Luminosity (bolometric) 1,000[6] L
Surface gravity (log g) 3.73[7] cgs
Temperature 12,963[7] K
Rotational velocity (v sin i) 176[8] km/s
Other designations
Alpha Columbae, α Col, CCDM J05396−3404 A, CD−34 2375, CPD−34 703, FK5 215, GC 7078,HD 37795, HIP 26634, HR 1956, NSV 2549,PPM 281732, SAO 196059.[9]