Phi Per
HIP 8068; Phi Per
Star
Per
Visible
Level 2
Small telescope (4")
Physical Properties
Magnitude
4.07
Range
3.96 - 4.15
Period
19.5 days
Variable Type
Gamma Cassiopeiae (Eruptive Be Star)
Spectral Type
B2Vep
Star Color
Blue-white
(B-V -0.04)
Distance
130 ly
Position & Identifiers
RA
01h 43m 39.6s
Dec
+50° 41' 19.0"
Constellation
Per
HR
496
HIP
8068
Bayer
Phi
Variable ID
Phi Per
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Visibility
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Light Curve
Multiple Star System
Separation
0.0″
Companion Mag
7.8
Companion Sp
sdO
Position Angle
227°
Star Colors
A: Blue-white
Discoverer
CIA 6
Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
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Stellar Fusion
Stellar Notes
Gamma Cas 4.03 - 4.11V, 19.5d. Amp. varies in per. 127d. Possible mass loss. Expanding circumstellar shell.
126.696d. Primary, 16.8k/s, V0 -8.4k/s, msin3i 21.1, asini 29.2; secondary K 105.3k/s, sin3i 3.4, | asini 184. Unresolved by speckle interferometry. Both components appear to be shell stars, B2Ve and B3Ve. Speculation | that secondary is the helium core of a once more massive star whose mass was transferred to the primary.
In neutral hydrogen region; Cas-Tau OB1.
FeII, H in emission. Also classified B0nne, B1III-Vpe.
Survey Image
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