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Variable star in the constellation Cetus From Wikipedia, the free encyclopedia
Mu Ceti (μ Ceti) is a star in the constellation Cetus. The combined apparent magnitude of the system is +4.27, and it is located 84 light-years from the Sun.
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cetus |
Right ascension | 02h 44m 56.54098s[1] |
Declination | 10° 06′ 50.9089″[1] |
Apparent magnitude (V) | +4.27[2] |
Characteristics | |
Spectral type | A9IIIp[3] |
Variable type | suspected δ Sct[4] |
Astrometry | |
Parallax (π) | 38.80 ± 0.32 mas[1] |
Distance | 84.1 ± 0.7 ly (25.8 ± 0.2 pc) |
Absolute magnitude (MV) | +2.17[5] |
Details | |
Mass | 1.6[6] M☉ |
Radius | 1.7[6] R☉ |
Luminosity | 7.5[6] L☉ |
Temperature | 7,141[5] K |
Rotational velocity (v sin i) | 45.1±2.3[5] km/s |
Age | 3.3[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
In Chinese, 天囷 (Tiān Qūn), meaning Circular Celestial Granary, refers to an asterism consisting of α Ceti, κ1 Ceti, λ Ceti, μ Ceti, ξ1 Ceti, ξ2 Ceti, ν Ceti, γ Ceti, δ Ceti, 75 Ceti, 70 Ceti, 63 Ceti and 66 Ceti. Consequently, the Chinese name for Mu Ceti itself is "the Fourth Star of Circular Celestial Granary".[7]
Mu Ceti is an A9 giant star. It has been suspected to be a δ Scuti variable,[4] but most studies find it to be of constant brightness.[9][10]
Three companions were all discovered during occultations of Mu Ceti by the Moon. An orbit was derived for the brightest with a period of 1,202 days.[6] Later studies have failed to find any evidence of these companions.[11]
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