| Observation data EpochJ2000 EquinoxJ2000 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 23h 58m 21.22532s[1] |
| Declination | –15° 50′ 50.9421″[1] |
| Apparent magnitude (V) | +6.276[2] |
| Characteristics | |
| Spectral type | K1III CNII[3] |
| U−Bcolor index | +1.03[4] |
| B−Vcolor 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 astar in theconstellation ofCetus. With anapparent magnitude of about 6.2,[2] the star is barely visible to the naked eye (seeBortle scale).Parallax estimates put it at a distance of about 535light-years (164parsecs) away from theEarth. It is moving further from the Sun with a heliocentricradial velocity of 4 km/s.[5]
This star has aspectral type of K1III,[3] implying aK-type giant. These types of stars are generally reddish-colored stars with spectral types fromK toM, with radii that are 10 to 100 times larger than theSun.[9] The "CNII" in its spectral type indicates strongcyanogen signature in its outer atmosphere.[10][11] The star is radiating 144[6] times theSun's luminosity from its enlargedphotosphere.
