Gamma Ceti
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 02h 43m 18.03910s |
| Declination | +03° 14′ 08.9390″ |
| Apparent magnitude (V) | 3.47 (3.56/6.63/10.16) |
| Characteristics | |
| Spectral type | A3 V + F3 V + K5 |
| U−B color index | +0.07 |
| B−V color index | +0.09 |
| Astrometry | |
| Radial velocity (Rv) | –5.1 km/s |
| Proper motion (μ) | RA: –146.10 mas/yr Dec.: –146.12 mas/yr |
| Parallax (π) | 40.97±0.63 mas |
| Distance | 80 ± 1 ly (24.4 ± 0.4 pc) |
| Absolute magnitude (MV) | +1.53 |
| Details | |
| γ Cet A | |
| Mass | 1.88 M☉ |
| Radius | 1.9 R☉ |
| Luminosity | 21 L☉ |
| Surface gravity (log g) | 4.3 cgs |
| Temperature | 8,551 K |
| Metallicity [Fe/H] | 0.00 dex |
| Rotational velocity (v sin i) | 186 km/s |
| Age | 647 Myr |
| γ Cet B | |
| Mass | 1.17 M☉ |
| Temperature | 6,051 K |
| Rotational velocity (v sin i) | 10 km/s |
| Other designations | |
| Kaffaljidhma, γ Cet, 86 Ceti, BD+02 422, HD 16970, HIP 12706, HR 804, SAO 110707, WDS 02433+0314 | |
| Database references | |
| SIMBAD | Gamma Ceti system |
| A | |
| B | |
| C | |
Gamma Ceti (γ Ceti, abbreviated Gamma Cet, γ Cet) is a triple star system in the equatorial constellation of Cetus. It has a combined apparent visual magnitude of 3.47. Based upon parallax measurements, this star is located at a distance of about 80 light-years (24.4 parsecs) from the Sun.
The three components are designated Gamma Ceti A (officially named Kaffaljidhma /ˌkæfəlˈdʒɪdmə/, the traditional name for the entire system), B and C.