![]() ![]() Location of Saiph (circled) |
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Observation data Epoch J2000 Equinox J2000 |
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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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