HD 222399
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 40m 02.8166s |
| Declination | +37° 39′ 09.506″ |
| Apparent magnitude (V) | 6.57 |
| Characteristics | |
| Spectral type | F2IV |
| U−B color index | +0.10 |
| B−V color index | +0.35 |
| Astrometry | |
| Radial velocity (Rv) | −21.0±0.6 km/s |
| Proper motion (μ) | RA: −8.490±0.042 mas/yr Dec.: −81.051±0.037 mas/yr |
| Parallax (π) | 10.7133±0.0351 mas |
| Distance | 304.4 ± 1.0 ly (93.3 ± 0.3 pc) |
| Details | |
| Mass | 1.77 M☉ |
| Radius | 1.52 R☉ |
| Luminosity | 17 L☉ |
| Surface gravity (log g) | 3.78 cgs |
| Temperature | 6,939 K |
| Metallicity [Fe/H] | −0.04 dex |
| Rotational velocity (v sin i) | 55 km/s |
| Age | 1.4 Gyr |
| Other designations | |
| BD+36°5098, HD 222399, HIP 116781, HR 8973, SAO 73422 | |
| Database references | |
| SIMBAD | A |
| B | |
HD 222399 is a double star in the northern constellation of Andromeda. The magnitude 6.57 primary is an F-type subgiant star with a stellar classification of F2IV. It has a magnitude 10.57 companion at an angular separation of 14.7″ along a position angle of 162° (as of 2002).