Kappa1 Ceti
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 03h 19m 21.6964s |
| Declination | +03° 22′ 12.715″ |
| Apparent magnitude (V) | 4.84 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | G5Vv |
| U−B color index | +0.185 |
| B−V color index | +0.674 |
| Variable type | BY Dra |
| Astrometry | |
| Radial velocity (Rv) | +19.9 km/s |
| Proper motion (μ) | RA: +269.298 mas/yr Dec.: +93.957 mas/yr |
| Parallax (π) | 107.8023±0.1838 mas |
| Distance | 30.26 ± 0.05 ly (9.28 ± 0.02 pc) |
| Absolute magnitude (MV) | 5.16 |
| Details | |
| Mass | 1.021±0.021 M☉ |
| Radius | 0.95±0.05 R☉ |
| Luminosity | 0.879±0.028 L☉ |
| Surface gravity (log g) | 4.50±0.04 cgs |
| Temperature | 5,786±87 K |
| Metallicity [Fe/H] | +0.04±0.01 dex |
| Rotation | 9.2 days |
| Rotational velocity (v sin i) | 4.5 km/s |
| Age | 300–400 Myr |
| Other designations | |
| κ1 Cet, 96 Ceti, NSV 1100, BD+02°518, FK5 1095, GJ 137, HD 20630, HIP 15457, HR 996, SAO 111120, WDS J03194+0322A, LTT 11094 | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Kappa1 Ceti is a yellow-hued variable star in the equatorial constellation of Cetus. Its name is a Bayer designation that is Latinized from κ1 Ceti, and abbreviated Kappa1 Cet or κ1 Cet. Bayer used the designations κ Ceti and g Tauri for the same star; g Tauri is now no longer used. With an apparent visual magnitude of 4.84, it is visible to the naked eye. Based on parallax measurements, it is located at a distance of 30.3 light-years (9.3 pc) from the Sun. The star is drifting further away with a line of sight velocity component of +20 km/s.
The star was discovered to have a rapid rotation, roughly once every nine days. Though there are no extrasolar planets confirmed to be orbiting the star, Kappa1 Ceti is considered a good candidate to contain terrestrial planets, like the Earth. The system is a candidate binary star, but has not been confirmed.