Mu2 Cancri
Mu2 Cancri is a solitary, yellow-hued star in the zodiac constellation of Cancer. It is visible to the naked eye with an apparent visual magnitude of +5.30. Based upon an annual parallax shift of 42.36 mas as seen from Earth, this star is located 77 light-years from the Sun. It is drifting closer with a radial velocity of −36 km/s and will make its closest approach in about 611,100 years when it passes at a distance of 16.8 light-years (5.2 parsecs).
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 07m 45.85581s |
| Declination | +21° 34′ 54.5325″ |
| Apparent magnitude (V) | +5.30 |
| Characteristics | |
| Evolutionary stage | Subgiant |
| Spectral type | G2 IV |
| U−B color index | +0.21 |
| B−V color index | +0.63 |
| Astrometry | |
| Radial velocity (Rv) | −36.0±0.1 km/s |
| Proper motion (μ) | RA: +23.610 mas/yr Dec.: −68.122 mas/yr |
| Parallax (π) | 42.3605 ± 0.1251 mas |
| Distance | 77.0 ± 0.2 ly (23.61 ± 0.07 pc) |
| Absolute magnitude (MV) | +3.46 |
| Details | |
| Mass | 1.192+0.017 −0.016 M☉ |
| Radius | 1.82 R☉ |
| Luminosity | 3.782±0.015 L☉ |
| Surface gravity (log g) | 3.97±0.02 cgs |
| Temperature | 5,809±59 K |
| Metallicity [Fe/H] | 0.11 dex |
| Rotational velocity (v sin i) | 3.7±0.3 km/s |
| Age | 5.64+0.35 −0.14 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
At the estimated age of 5.6 billion years, Mu2 Cancri is an evolving G-type subgiant star with a stellar classification of G2 IV. It has 1.2 times the mass of the Sun and 1.8 times the Sun's radius. Mu2 Cancri has relatively high metallicity—what astronomers term the abundance of elements other than hydrogen and helium—having a 29% higher abundance compared to the Sun. It is radiating 3.78 times the Sun's luminosity at an effective temperature of 5,809 K. The star is spinning at a leisurely projected rotational velocity of 3.7 km/s.