| Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
|---|---|
| Constellation | Cancer[1] |
| Right ascension | 08h 56m 56.598s[2] |
| Declination | +32° 54′ 37.54″[2] |
| Apparent magnitude (V) | +5.436[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4][2] |
| Spectral type | A7 IV[4] |
| B−Vcolor index | +0.157[3] |
| Astrometry | |
| Radial velocity (Rv) | −26.2±0.7[5] km/s |
| Proper motion (μ) | RA: −53.031mas/yr[2] Dec.: −66.186mas/yr[2] |
| Parallax (π) | 17.0377±0.0716 mas[2] |
| Distance | 191.4 ± 0.8 ly (58.7 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.57[1] |
| Details | |
| Mass | 1.79[6] M☉ |
| Radius | 2.28+0.02 −0.04[2] R☉ |
| Luminosity | 21.5[4] L☉ |
| Surface gravity (log g) | 4.17[6] cgs |
| Temperature | 8,309±283[6] K |
| Rotational velocity (v sin i) | 133[4] km/s |
| Age | 441[6] Myr |
| Other designations | |
| σ2 Cnc,59 Cancri,BD+33°1785,HD 76398,HIP 43932,HR 3555,SAO 61146[7] | |
| Database references | |
| SIMBAD | data |
Sigma2 Cancri is a solitary,[8] white-huedstar in theconstellationCancer. Its name is aBayer designation that isLatinized from σ2 Cancri, and abbreviated Sigma2 Cnc σ2 Cnc. This star is faintly visible to thenaked eye, having anapparent visual magnitude of +5.44.[3] Based upon an annualparallax shift of17.04 mas as seen from Earth,[2] this star is located 191light-years (59 pc) from theSun. It is drifting closer to the Sun with aradial velocity of −26 km/s.[5]
With an estimated age of 441[6] million years, this is anA-typesubgiant star with astellar classification of A7 IV.[4] It is spinning rapidly with aprojected rotational velocity of 133 km/s.[4] The star has an estimated 1.8[6] times themass of the Sun with 2.3 times the Sun's radius.[2] It is radiating 21.5[4] times theSun's luminosity from itsphotosphere at aneffective temperature of roughly 8,309 K.[6]
