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Proper NameNone
Bayer DesignationTau Orionis
Flamsteed Number20 Orionis
HR (BSC)1735
Right Ascension5h 17m 36s
Declination-6° 50' 40"
Distance494 light years
152 parsecs
MagnitudeApparent: +3.6
Absolute: -2.6
Spectral ClassB5III Blue Giant
Optimum VisibilityDecember / January
NotesA blue star a little to the north of Rigel at to the foot of Orion, and actually somewhat closer to the Sun than its more luminous neighbour in the sky.


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