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Alderamin

Alpha Cephei, 5 Cephei

Proper NameAlderamin
Bayer DesignationAlpha Cephei
Flamsteed Number5 Cephei
BSC8162
HD203280
ConstellationCepheus
Right Ascension21h 18m 35s
Declination+62° 35' 8"
Distance49 light years
15 parsecs
MagnitudeApparent: +2.5
Absolute: +1.6
Spectral ClassA7V White Main Sequence Star
Optimum VisibilityAugust / September (Usually visible from northern latitudes)
Image of Alderamin

Alderamin has an unusually intense magnetic field, perhaps giving rise to starspots (the equivalent of sunspots on the Sun) like those shown in this image.

A variable white star, the brightest in the constellation of Cepheus, with an apparent magnitude of +2.5.

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