HD 108863
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices |
| Right ascension | 12h 30m 19.9101s |
| Declination | +21° 56′ 53.6794″ |
| Apparent magnitude (V) | 7.71 |
| Characteristics | |
| Evolutionary stage | subgiant |
| Spectral type | K0III-IV |
| B−V color index | 0.99 |
| Astrometry | |
| Radial velocity (Rv) | −27.832 km/s |
| Proper motion (μ) | RA: −75.501 mas/yr Dec.: −33.669 mas/yr |
| Parallax (π) | 6.0417±0.0485 mas |
| Distance | 540 ± 4 ly (166 ± 1 pc) |
| Orbit | |
| Primary | HD 108863 |
| Companion | HD 108863 B |
| Semi-major axis (a) | 0.115" (16.065 AU) |
| Details | |
| Mass | 1.59 M☉ |
| Radius | 5.74 R☉ |
| Surface gravity (log g) | 3.07 cgs |
| Temperature | 4,878 K |
| Metallicity | 0.02 |
| Rotational velocity (v sin i) | 1.6±0.6 km/s |
| Age | 1.8±0.4 Gyr |
| Other designations | |
| BD+22 2478, Gaia DR2 3952692457305436800, HD 108863, HIP 61020, TYC 1447-2345-1, 2MASS J12301991+2156537 | |
| Database references | |
| SIMBAD | data |
HD 108863 is a subgiant star, the primary of a binary star system 540 light-years away, belonging to spectral class K0. Its age is younger than the Sun's at 1.8±0.4 billion years. The primary star is slightly enriched in heavy elements, having 115% of solar abundance. The primary star does not have detectable flare activity.
In 2014, a poorly characterized co-moving stellar companion HD 108863 B, likely a main sequence star of spectral class between F6 and G4, was discovered at a projected separation of 16.065 AU.