Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Octans |
Right ascension | 23h 38m 23.88625s[1] |
Declination | −76° 52′ 10.3567″[1] |
Apparent magnitude (V) | 5.98±0.01[2] |
Characteristics | |
Evolutionary stage | red giant branch[3] |
Spectral type | K0 II/III[4] |
U−B color index | +0.65[5] |
B−V color index | +0.90[5] |
Astrometry | |
Radial velocity (Rv) | 2.3±0.5[6] km/s |
Proper motion (μ) | RA: +83.519 mas/yr[1] Dec.: −25.064 mas/yr[1] |
Parallax (π) | 6.0864 ± 0.0294 mas[1] |
Distance | 536 ± 3 ly (164.3 ± 0.8 pc) |
Absolute magnitude (MV) | −0.05[7] |
Details[8] | |
Mass | 3.20±0.10 M☉ |
Radius | 12.6±0.2 R☉ |
Luminosity | 102±3 L☉ |
Surface gravity (log g) | 2.85±0.06 cgs |
Temperature | 5,175±30 K |
Metallicity [Fe/H] | +0.05±0.03 dex |
Rotational velocity (v sin i) | 3.7±1[9] km/s |
Age | 318+30 −40[1] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 222060, also known as HR 8957, is a solitary, orange hued star located in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.98,[2] allowing it to be faintly visible to the naked eye. Based on parallax measurements from GAIA, the object is estimated to be 536 light years distant.[1] It appears to be slowly receding from the Solar System, having a heliocentric radial velocity of 2.3 km/s.[9]
This is an evolved giant star that is currently on the red giant branch,[3] fusing a hydrogen shell around a helium core. HD 222060 a stellar classification of K0 II/III,[4] a K-type star with the blended luminosity class of a giant and a bright giant. It has 3.2 times the mass of the Sun[8] and is currently 318 million years old.[9] Due to its high mass, the object has expanded to an enlarged radius of 12.6 R☉.[8] It radiates 102 times the luminosity of the Sun from its photosphere at an effective temperature of 5,175 K.[8] HD 222060 has a near solar metallicity[8] and spins modestly with a projected rotational velocity of 3.7 km/s.[9]