Saiph

Location of Saiph (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Orion
Right ascension 05
Declination 09° 40′ 10.5777″
Apparent magnitude (V) 2.09
Characteristics
Spectral type B0.5 Iab:
U−B color index –1.02
B−V color index –0.18
Variable type Slightly
Astrometry
Radial velocity (Rv) +20.5 km/s
Proper motion (μ) RA: +1.46 mas/yr
Parallax (π) 5.04 ± 0.22mas
Distance 650 ± 30 ly
(198 ± 9 pc)
Absolute magnitude (MV) –6.1
Details
Mass 15.50 ± 1.25M
Radius 22.2R
Luminosity 56,881L
Surface gravity (log g) 2.9
Temperature 26,500K
Rotational velocity (v sin i) 83 km/s
Age 11.1 ± 0.5Myr
Other designations
κ Orionis, 53 Orionis, 141 G. Orionis, BD–09 1235, FK5 220, HD 38771, HIP 27366, HR 2004, SAO 132542.

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Saiph, which is released under the Creative Commons Attribution-Share-Alike License 3.0