Rho2 Cancri

Rho² Cancri is a solitary,^[4] yellow-hued star in the constellation Cancer. Its name is a Bayer designation that is Latinized from ρ² Cancri, and abbreviated or Rho² Cnc or ρ² Cnc. 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 approximately 585 light-years (179 pc) from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.06 due to interstellar dust.^[6] It is moving further away with a line of sight velocity of +16 km/s.^[5]

For other stars with this Bayer designation, see ρ Cancri.

Rho² Cancri

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Cancer
Right ascension	08h 55m 39.680s[1]
Declination	+27° 55′ 38.94″[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: −13.014 mas/yr[1] Dec.: −32.535 mas/yr[1]
Parallax (π)	5.5719±0.0903 mas[1]
Distance	585 ± 9 ly (179 ± 3 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
ρ2 Cnc, 58 Cancri, BD+28°1666, FK5 2705, GC 12326, HD 76219, HIP 43834, HR 3540, SAO 80511[8]
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] The star is spinning with a projected rotational velocity of 8 km/s.^[3]