Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cancer |
Right ascension | 09h 10m 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 | |
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]