Mu Ceti
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 02h 44m 56.53735s |
| Declination | +10° 06′ 50.9217″ |
| Apparent magnitude (V) | +4.27 (4.30 + 7.80) |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | A9IIIp + K0.5V |
| Variable type | Gamma Doradus |
| Astrometry | |
| Radial velocity (Rv) | +29.53±0.28 km/s |
| Proper motion (μ) | RA: +278.641 mas/yr Dec.: −41.222 mas/yr |
| Parallax (π) | 37.5924±0.2440 mas |
| Distance | 86.8 ± 0.6 ly (26.6 ± 0.2 pc) |
| Absolute magnitude (MV) | +2.17 |
| Details | |
| A | |
| Mass | 1.66±0.04 M☉ |
| Radius | 2.07±0.11 R☉ |
| Luminosity | 10.1±0.4 L☉ |
| Surface gravity (log g) | 3.92±0.23 cgs |
| Temperature | 7,380±180 K |
| Metallicity | = 0.06±0.03 |
| Rotational velocity (v sin i) | 45.1±2.3 km/s |
| Age | 1.20+0.18 −0.16 Gyr |
| B | |
| Mass | 0.80±0.10 M☉ |
| Radius | 0.80±0.15 R☉ |
| Temperature | 5,250 K |
| Orbit | |
| Primary | A |
| Companion | B |
| Period (P) | 33.62±0.03 yr |
| Semi-major axis (a) | 0.5259±0.0026″ |
| Eccentricity (e) | 0.9219±0.0006 |
| Inclination (i) | 95.5±0.4° |
| Longitude of the node (Ω) | 59.18±0.06° |
| Periastron epoch (T) | 2019.33 yr |
| Argument of periastron (ω) (secondary) | 78.26±0.01° |
| Other designations | |
| 87 Ceti, HD 17094, HIP 12828, HR 813, SAO 110723, BD+09°359 | |
| Database references | |
| SIMBAD | data |
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Mu Ceti (μ Ceti) is a binary star in the constellation Cetus, the whale, close to Pisces. The combined apparent magnitude of the system is +4.27, making it visible as a faint star from skies with low or no luminous pollution. Based upon parallax measurements taken by the Gaia spacecraft, it is located 87 light-years away.
The location of Mu Ceti next to the ecliptic make it succeptible to lunar occultations.