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Mirphak, Algenib, Alpha Persei, 33 Persei

Proper NamesMirfak, Mirphak, Algenib
Bayer DesignationAlpha Persei
Flamsteed Number33 Persei
HR (BSC)1017
Right Ascension3h 24m 19s
Declination+49° 51' 40"
Distance506 light years
155 parsecs
MagnitudeApparent: +1.9
Absolute: -4.4
Spectral ClassF5 Bright Yellow Supergiant
Optimum VisibilityNovember / December (Usually visible from northern latitudes)
NotesA bright yellow supergiant star more than fifty times the Sun's diameter, Mirfak is also sometimes given the traditional name Algenib, 'the side', a name it shares with the unrelated star Gamma Pegasi.

Though Algol is probably the most famous of Perseus' stars, it is literally outshone by this distant supergiant.


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