Phi Persei
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| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| 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. The primary has 9.3 times the radius of the Sun.[2] 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.
[edit] References
- ^ "HD 10516 -- Variable Star with rapid variations". SIMBAD Astronomical Database. http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=phi+persei. Retrieved 2007-04-01.
- ^ Underhill, A. B. et al. (November 1979), "Effective temperatures, angular diameters, distances and linear radii for 160 O and B stars", Monthly Notices of the Royal Astronomical Society 189: 601–605, Bibcode 1979MNRAS.189..601U
- "HST Press release on the φ Per binary system". NASA. http://hubblesite.org/newscenter/archive/releases/1997/39. Retrieved 2010-09-25.
