![]() ![]() Location of γ Orionis (circled) |
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Observation data Epoch J2000 Equinox J2000 |
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Constellation | Orion |
Pronunciation | /ˈbɛlətrɪks/ |
Right ascension | 05 |
Declination | +06° 20′ 58.9318″ |
Apparent magnitude (V) | 1.64 |
Characteristics | |
Spectral type | B2 III |
U−B color index | –0.86 |
B−V color index | –0.21 |
Variable type | Eruptive |
Astrometry | |
Radial velocity (Rv) | +18.2 km/s |
Proper motion (μ) | RA: –8.11 mas/yr |
Parallax (π) | 12.92 ± 0.52mas |
Distance | 250 ± 10 ly (77 ± 3 pc) |
Details | |
Mass | 8.4+0.3 −0.1M☉ |
Radius | 6R☉ |
Luminosity | ~6,400L☉ |
Surface gravity (log g) | 3.60 |
Temperature | 22,000K |
Metallicity [Fe/H] | –0.25dex |
Rotational velocity (v sin i) | 46 ± 8 km/s |
Age | 20+2 −4Myr |
Other designations | |
Bellatrix, γ Orionis, Amazon Star, warrioress, 24 Ori, Al Najid, HR 1790, BD +06°919, HD 35468, SAO 112740, FK5 201, HIP 25336.
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