HD 224635 and HD 224636
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| HD 224635 | |
| Right ascension | 23h 59m 29.2915s |
| Declination | +33° 43′ 25.8773″ |
| Apparent magnitude (V) | 6.46 |
| HD 224636 | |
| Right ascension | 23h 59m 29.2054s |
| Declination | +33° 43′ 27.6539″ |
| Apparent magnitude (V) | 6.72 |
| Characteristics | |
| HD 224635 | |
| Evolutionary stage | main sequence |
| Spectral type | F8 |
| B−V color index | 0.51 |
| HD 224636 | |
| Evolutionary stage | main sequence |
| Spectral type | G1 |
| B−V color index | 0.55 |
| Astrometry | |
| Radial velocity (Rv) | −7.90±0.2 km/s |
| Proper motion (μ) | RA: −59.68±0.65 mas/yr Dec.: −113.19±0.35 mas/yr |
| Parallax (π) | 34.57±0.51 mas |
| Distance | 94 ± 1 ly (28.9 ± 0.4 pc) |
| Absolute magnitude (MV) | +3.5 |
| Details | |
| HD 224635 | |
| Mass | 1.19 M☉ |
| Radius | 1.20 R☉ |
| Luminosity | 1.90 L☉ |
| Surface gravity (log g) | 4.36 cgs |
| Temperature | 6,191 K |
| Metallicity | −0.070 |
| Age | 1.42 Gyr |
| HD 224636 | |
| Mass | 1.13 M☉ |
| Radius | 1.15 R☉ |
| Luminosity | 1.58 L☉ |
| Surface gravity (log g) | 4.36 cgs |
| Temperature | 6,023 K |
| Metallicity | −0.070 |
| Age | 1.46 Gyr |
| Other designations | |
| BD+32 4747, HIP 118281, SAO 73656, ADS 17149, WDS J23595+3343 | |
| HD 224635: HR 9074 | |
| HD 224636: HR 9075 | |
| Database references | |
| SIMBAD | HD 224635 |
| HD 224636 | |
HD 224635 and HD 224636 is a pair of stars comprising a binary star system in the constellation Andromeda. They are located approximately 94 light years away and they orbit each other every 717 years.
The primary star is HD 224635, a magnitude 6.46 star (making it visible by the naked eye under very favourable conditions) with a spectral type F8 that is 1.19 times more massive than the Sun.
The secondary star is the slightly fainter HD 224636, with an apparent visual magnitude of 6.72, a spectral type G1, and 1.13 times more massive than the Sun.