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Proper NameNone
Bayer DesignationPhi1 Orionis
Flamsteed Number37 Orionis
HR (BSC)1876
Right Ascension5h 34m 49s
Declination+9° 29' 22"
Distancec.1,100 light years
c.300 parsecs
MagnitudeApparent: +4.4
Absolute: -3.2
Spectral ClassB0III Blue Giant
Optimum VisibilityDecember / January
NotesThough it appears separated from Phi2 Orionis by less than a degree in the sky, the two stars are an optical double created by a line-of-sight effect, and Phi1 is in fact some ten times more distant from the Solar System than its apparent neighbour Phi2.


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