8 Cancri
Star in the constellation Cancer
From Wikipedia, the free encyclopedia
8 Cancri is a single,[7] white-hued star in the zodiac constellation of Cancer. It has an apparent visual magnitude of +5.14,[2] which indicates it is faintly visible to the naked eye under suitable viewing conditions. The distance to this star, as determined from its annual parallax shift of 15.20 mas,[1] is around 215 light years. A radial velocity of +21 km/s indicates it is moving away from the Sun.[4]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 05m 04.48834s[1] |
| Declination | +13° 07′ 05.5757″[1] |
| Apparent magnitude (V) | +5.14[2] |
| Characteristics | |
| Spectral type | A1 V[3] |
| B−V color index | 0.018±0.005[2] |
| Astrometry | |
| Radial velocity (Rv) | +21.0±4.2[4] km/s |
| Proper motion (μ) | RA: −35.78[1] mas/yr Dec.: −63.81[1] mas/yr |
| Parallax (π) | 15.20±0.32 mas[1] |
| Distance | 215 ± 5 ly (66 ± 1 pc) |
| Absolute magnitude (MV) | 1.05[2] |
| Details | |
| Mass | 2.37[5] M☉ |
| Luminosity | 36.6[2] L☉ |
| Surface gravity (log g) | 4.29±0.14[5] cgs |
| Temperature | 10,352±352[5] K |
| Rotational velocity (v sin i) | 173[5] km/s |
| Age | 144[5] Myr |
| Other designations | |
| 8 Cnc, BD+13°1831, FK5 2625, GC 10959, HD 66664, HIP 39567, HR 3163, SAO 97542[6] | |
| Database references | |
| SIMBAD | data |
This is an A-type main-sequence star with a stellar classification of A1 V.[3] It is a young star with an estimated age of just 144[5] million years, and has a high rate of spin with a projected rotational velocity of 173 km/s.[5] 8 Cancri has 2.37[5] times the mass of the Sun and is radiating 36.6[2] times the Sun's luminosity from its photosphere at an effective temperature of around 10,352 K.[5]