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Adid Australis

Epsilon Persei, 45 Persei

Proper NameAdid Australis
Bayer DesignationEpsilon Persei
Flamsteed Number45 Persei
HR (BSC)1220
HD24760
ConstellationPerseus
Right Ascension3h 57m 51s
Declination+40° 0' 37"
Distance638 light years
196 parsecs
MagnitudeApparent: +2.9
Absolute: -3.6
Spectral ClassB0.5V Blue Main Sequence Star
Optimum VisibilityDecember
NotesThe primary component of this system is a massive blue star, immensely larger than the Sun and thousands of times more luminous. A much less massive companion star follows a close and highly eccentric orbit around the primary, and the system may also have a third component star in a rather more distant orbit.

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