Rho2 Cancri
Star in the constellation Cancer From Wikipedia, the free encyclopedia
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Star in the constellation Cancer From Wikipedia, the free encyclopedia
Rho2 Cancri (ρ2 Cancri) is a solitary,[4] yellow-hued star in the constellation Cancer. With an apparent visual magnitude of 5.22,[2] it is visible to the naked eye on a dark night. Based upon an annual parallax shift of 6.70 mas as seen from Earth,[1] this star is located around 490 light-years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.06 due to interstellar dust.[6]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Cancer |
Right ascension | 08h 55m 39.68055s[1] |
Declination | +27° 55′ 38.9299″[1] |
Apparent magnitude (V) | 5.22[2] |
Characteristics | |
Spectral type | G8 III[3] or G8 II-III[4] |
U−B color index | +0.78[2] |
B−V color index | +1.00[2] |
Astrometry | |
Radial velocity (Rv) | +16.3±0.3[5] km/s |
Proper motion (μ) | RA: −12.24[1] mas/yr Dec.: −33.79[1] mas/yr |
Parallax (π) | 6.70 ± 0.32 mas[1] |
Distance | 490 ± 20 ly (149 ± 7 pc) |
Absolute magnitude (MV) | −1.13[3] |
Details | |
Mass | 3.59[6] M☉ |
Radius | 24.2[3] R☉ |
Luminosity | 310[3] L☉ |
Surface gravity (log g) | 2.46[7] cgs |
Temperature | 4,994[7] K |
Metallicity [Fe/H] | 0.11[7] dex |
Rotational velocity (v sin i) | 8.1[3] km/s |
Age | 234[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
At the age of about 234[6] million years, is an evolved, G-type giant star with a stellar classification of G8 III.[3] It has an estimated 3.6[6] times the mass of the Sun and has expanded to 24[3] times the Sun's radius. It is radiating 310[3] times the Sun's luminosity from its photosphere at an effective temperature of 4,994 K.[7]
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