77 Ceti
Star in the constellation Cetus
From Wikipedia, the free encyclopedia
77 Ceti is a single,[9] orange-hued star located 498 light years away in the equatorial constellation of Cetus. It is faintly visible to the naked eye, having an apparent visual magnitude of 5.7.[3] This is an evolved giant star with a stellar classification of K2 III.[4] It is radiating 239 times the Sun's luminosity from its photosphere at an effective temperature of 4,478 K.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cetus[1] |
| Right ascension | 02h 34m 42.62364s[2] |
| Declination | −07° 51′ 34.0026″[2] |
| Apparent magnitude (V) | 5.731[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K2 III[4] |
| U−B color index | +1.68[5] |
| B−V color index | +1.393±0.008[1] |
| Astrometry | |
| Radial velocity (Rv) | 24.9±2[6] km/s |
| Proper motion (μ) | RA: +59.658[2] mas/yr Dec.: −63.960[2] mas/yr |
| Parallax (π) | 6.5487±0.0618 mas[2] |
| Distance | 498 ± 5 ly (153 ± 1 pc) |
| Absolute magnitude (MV) | +0.01[1] |
| Details | |
| Mass | 3.5[2] M☉ |
| Radius | 28[2] R☉ |
| Luminosity | 239[2] L☉ |
| Surface gravity (log g) | 1.99[2] cgs |
| Temperature | 4,478[2] K |
| Metallicity [Fe/H] | −0.12[7] dex |
| Age | 250[2] Myr |
| Other designations | |
| BD−08°484, HD 16074, HIP 12002, HR 752, SAO 129984[8] | |
| Database references | |
| SIMBAD | data |
