| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 09h10m 20.85841s[1] |
| Declination | +21° 59′ 47.1000″[1] |
| Apparent magnitude (V) | 6.04[2] |
| Characteristics | |
| Evolutionary stage | giant |
| Spectral type | G5 III[3] |
| B−V color index | 0.871[4] |
| Astrometry | |
| Radial velocity (Rv) | −3.24±0.13[1] km/s |
| Proper motion (μ) | RA: +2.933[1] mas/yr Dec.: +5.027[1] mas/yr |
| Parallax (π) | 8.1569 ± 0.0676 mas[1] |
| Distance | 400 ± 3 ly (123 ± 1 pc) |
| Absolute magnitude (MV) | 0.78[2] |
| Details | |
| Mass | 2.30[4] M☉ |
| Radius | 9.41+0.38 −0.57[1] R☉ |
| Luminosity | 57.6±0.6[1] L☉ |
| Surface gravity (log g) | 2.88[5] cgs |
| Temperature | 5,076±47[4] K |
| Metallicity [Fe/H] | −0.10[5] dex |
| Age | 770[4] Myr |
| Other designations | |
79 Cnc, BD+22°2063, GC 12655, HD 78715, HIP 45033, HR 3640, SAO 80674, WDS 09103+2200[6] | |
| Database references | |
| SIMBAD | data |
79 Cancri is a star in the constellation Cancer, located 400 light years from the Sun.[1] It is just visible to the naked eye as a dim, yellow-hued star with an apparent visual magnitude of 6.04.[2] This object is gradually moving slower to the Earth with a heliocentric radial velocity of −3.2 km/s.[1]
This is an aging giant star with a stellar classification of G5 III,[3] which indicates that, at the age of 770[4] million years, it has exhausted the hydrogen at its core and evolved away from the main sequence. The star has 2.30[4] times the mass of the Sun and has expanded to 9.4[1] times the Sun's radius. It is radiating 58[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,076 K.[4]
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