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Xi Persei
Star in the constellation Perseus / From Wikipedia, the free encyclopedia
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Xi Persei (ξ Persei, abbreviated Xi Per, ξ Per), known also as Menkib /ˈmɛŋkɪb/,[8][9] is a star in the constellation of Perseus. Based upon parallax measurements taken during the Hipparcos mission, it is approximately 1,200 light-years from the Sun.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Perseus |
Right ascension | 03h 58m 57.90229s[1] |
Declination | +35° 47′ 27.7132″[1] |
Apparent magnitude (V) | 4.04[2] |
Characteristics | |
Spectral type | O7.5III(n)((f))[3] |
U−B color index | −0.93[2] |
B−V color index | +0.02[2] |
Variable type | slightly variable[4] |
Astrometry | |
Radial velocity (Rv) | 65.40[5] km/s |
Proper motion (μ) | RA: 3.62[1] mas/yr Dec.: 1.74[1] mas/yr |
Parallax (π) | 2.62 ± 0.51 mas[1] |
Distance | approx. 1,200 ly (approx. 380 pc) |
Absolute magnitude (MV) | −5.50[3] |
Details | |
Mass | 26[3]-36[6] M☉ |
Radius | 14[6] R☉ |
Luminosity | 263,000[3] L☉ |
Surface gravity (log g) | 3.5[3] cgs |
Temperature | 35,000[6] K |
Rotational velocity (v sin i) | 220[3] km/s |
Age | ~7[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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