Phi Orionis
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Orion |
| Right ascension | 5h 34m 49.2s |
| Declination | 9° 29' 22" |
| Apparent magnitude (V) | +4.39 |
| Absolute magnitude (V) | -3.04 |
| Distance | 1000 ly (306.75 pc) |
| Spectral type | B0V |
| Other designations | |
The Bayer designation Phi Orionis (φ Ori/ φ Orionis) is shared by two star systems, φ¹ Orionis and φ² Orionis, in the constellation Orion. The two stars are separated by approximately 0.71° on the sky. Phi Orionis also has the traditional name Khad, from the Arabic خد الجوزاء khad al-jauzah meaning Cheek of the Central One.
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[edit] φ¹ Orionis
Phi-1 Orionis, also called Khad Prior ("Preceding One of the Cheek"), is a binary star lying about 1000 light years from Earth. Phi-1 Orionis is a spectral type B0 main sequence star which has an apparent magnitude of +4.39.
[edit] φ² Orionis
| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Orion |
| Right ascension | 5h 36m 54.3s |
| Declination | 9° 17' 26" |
| Apparent magnitude (V) | +4.09 |
| Absolute magnitude (V) | +1.32 |
| Distance | 117 ly (35.89 pc) |
| Spectral type | K0III |
| Other designations | |
Phi-2 Orionis, also called Khad Posterior ("Succeeding One of the Cheek"), is a spectral type K0 giant which has an apparent magnitude of +4.09. It is about 115 light years from Earth.
[edit] References
- HD 36822 -- Spectroscopic Binary Star. SIMBAD Astronomical Database. Retrieved on 2006-12-10.
- HD 37160 -- High Proper-motion Star. SIMBAD Astronomical Database. Retrieved on 2006-12-10.
[edit] External links
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