| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 23h58m 21.22532s[1] |
| Declination | –15° 50′ 50.9421″[1] |
| Apparent magnitude (V) | +6.276[2] |
| Characteristics | |
| Spectral type | K1III CNII[3] |
| U−B color index | +1.03[4] |
| B−V color index | +1.08[4] |
| Astrometry | |
| Radial velocity (Rv) | 4.3±2[5] km/s |
| Proper motion (μ) | RA: +82.668[1] mas/yr Dec.: –7.878[1] mas/yr |
| Parallax (π) | 6.0976 ± 0.0711 mas[1] |
| Distance | 535 ± 6 ly (164 ± 2 pc) |
| Absolute magnitude (MV) | –0.10[6] |
| Details | |
| Radius | 28[7] R☉ |
| Luminosity | 143.53[6] L☉ |
| Other designations | |
1 Cet, BD−16°6394, FK5 3925, GC 33242, HD 224481, HIP 118178, HR 9065, SAO 165972[8] | |
| Database references | |
| SIMBAD | data |
1 Ceti is a star in the constellationofCetus. With an apparent magnitude of about 6.2,[2] the star is barely visible to the naked eye (see Bortle scale). Parallax estimates put it at a distance of about 535 light-years (164 parsecs) away from the Earth. It is moving further from the Sun with a heliocentric radial velocity of 4 km/s.[5]
This star has a spectral type of K1III,[3] implying a K-type giant. These types of stars are generally reddish-colored stars with spectral types from KtoM, with radii that are 10 to 100 times larger than the Sun.[9] The "CNII" in its spectral type indicates strong cyanogen signature in its outer atmosphere.[10][11] The star is radiating 144[6] times the Sun's luminosity from its enlarged photosphere.
