Algol
Star
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Algol, designated Beta Persei, known colloquially as the Demon Star, is a bright multiple star in the constellation of Perseus and one of the first non-nova variable stars to be discovered. Wikipedia
Constellation: Perseus
Coordinates: RA 3h 8m 10s | Dec +40° 57′ 20″
Mass: 1.154 × 10^31 kg (5.8 M☉)
Magnitude: 2.12
Absolute magnitude: -0.11
Age: 570 Myr
Distance to Earth: 92.95 light years