Observation data Epoch J2000.0 Equinox J2000.0 |
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Constellation | Perseus |
Right ascension | 1h 43m 39.62s |
Declination | 50° 41' 19.6" |
Apparent magnitude (V) | 4.01 |
Absolute magnitude (V) | -2.70 |
Distance | 716 ly (219.63 pc) |
Spectral type | B2Vpe |
Other designations | |
Phi Persei (φ Persei, φ Per) is a Class B2Vpe, fourth-magnitude star in the constellation Perseus. Due to its isolation and distance from Cassiopeia, Andromeda and the rest of Perseus, John Flamsteed never took thought to assign a number and constellation to Phi Persei.
Phi Persei is binary consisting of a blue main sequence primary of class B2 and an apparent magnitude of 4.01 and a hot subdwarf secondary. Phi Persei is also a variable star with rapid variations in its brightness and spectrum. The Phi Persei stellar system is located about 716 light-years from Earth.
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