| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 09h 09m 02.31165s[1] |
| Declination | +17° 28′ 10.7518″[1] |
| Apparent magnitude (V) | 7.19[2] |
| Characteristics | |
| Spectral type | K3 III[2] |
| B−Vcolor index | 1.207±0.008[2] |
| Astrometry | |
| Radial velocity (Rv) | +77.70±0.15[1] km/s |
| Proper motion (μ) | RA: −38.419[1]mas/yr Dec.: −32.292[1]mas/yr |
| Parallax (π) | 5.9540±0.0572 mas[1] |
| Distance | 548 ± 5 ly (168 ± 2 pc) |
| Absolute magnitude (MV) | 0.56[2] |
| Details | |
| Mass | 1.62[3] M☉ |
| Radius | 10.92+0.50 −0.94[1] R☉ |
| Luminosity | 47.6±0.6[1] L☉ |
| Temperature | 4,587+213 −101[1] K |
| Age | 2.91[3] Gyr |
| Other designations | |
| 78 Cnc,BD+28°1683,HD 77557,HIP 44512,HR 3601,SAO 80609[4] | |
| Database references | |
| SIMBAD | data |
78 Cancri is astar in thezodiacconstellation ofCancer, located 548[1] light years from the Sun. It is too faint to be viewed with the naked eye, having anapparent visual magnitude of 7.19.[2] The star is moving away from the Earth with a relatively largeradial velocity of +77.7 km/s.[1] It is anevolvedgiant star with astellar classification of K3 III.[2]
