S Persei
Star
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S Persei is a red supergiant or hypergiant located near the Double Cluster in Perseus, north of the cluster NGC 869. It is a member of the Perseus OB1 association and one of the largest known stars. If placed in the Solar System, its photosphere... Wikipedia
Luminosity: 123,000 – 186,000 L☉
Temperature: 3,500 (3,000 – 3,600) K
Magnitude: 1.33
Mass: 20 M☉
Constellation: Perseus
Surface gravity (log g): 0.0 cgs