Sigma2 Cancri
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 56m 56.598s |
| Declination | +32° 54′ 37.54″ |
| Apparent magnitude (V) | +5.436 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A7 IV |
| B−V color index | +0.157 |
| Astrometry | |
| Radial velocity (Rv) | −26.2±0.7 km/s |
| Proper motion (μ) | RA: −53.031 mas/yr Dec.: −66.186 mas/yr |
| Parallax (π) | 17.0377±0.0716 mas |
| Distance | 191.4 ± 0.8 ly (58.7 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.57 |
| Details | |
| Mass | 1.79 M☉ |
| Radius | 2.28+0.02 −0.04 R☉ |
| Luminosity | 21.5 L☉ |
| Surface gravity (log g) | 4.17 cgs |
| Temperature | 8,309±283 K |
| Rotational velocity (v sin i) | 133 km/s |
| Age | 441 Myr |
| Other designations | |
| σ2 Cnc, 59 Cancri, BD+33°1785, HD 76398, HIP 43932, HR 3555, SAO 61146 | |
| Database references | |
| SIMBAD | data |
Sigma2 Cancri is a solitary, white-hued star in the constellation Cancer. Its name is a Bayer designation that is Latinized from σ2 Cancri, and abbreviated Sigma2 Cnc σ2 Cnc. This star is faintly visible to the naked eye, having an apparent visual magnitude of +5.44. Based upon an annual parallax shift of 17.04 mas as seen from Earth, this star is located 191 light-years (59 pc) from the Sun. It is drifting closer to the Sun with a radial velocity of −26 km/s.
With an estimated age of 441 million years, this is an A-type subgiant star with a stellar classification of A7 IV. It is spinning rapidly with a projected rotational velocity of 133 km/s. The star has an estimated 1.8 times the mass of the Sun with 2.3 times the Sun's radius. It is radiating 21.5 times the Sun's luminosity from its photosphere at an effective temperature of roughly 8,309 K.