HD 217107
HD 217107 (6 G. Piscium) is a yellow subgiant star approximately 65 light-years away from Earth in the constellation of Pisces (the Fish). Its mass is very similar to the Sun's, although it is considerably older. Two planets have been discovered orbiting the star: one is extremely close and completes an orbit every seven days, while the other is much more distant, taking fourteen years to complete an orbit.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pisces |
| Right ascension | 22h 58m 15.5408s |
| Declination | −2° 23′ 43.383″ |
| Apparent magnitude (V) | +6.17 |
| Characteristics | |
| Spectral type | G8 IV-V |
| B−V color index | 0.744±0.006 |
| Astrometry | |
| Radial velocity (Rv) | −13.4±0.1 km/s |
| Proper motion (μ) | RA: −6.819(25) mas/yr Dec.: −15.040(23) mas/yr |
| Parallax (π) | 49.7846 ± 0.0263 mas |
| Distance | 65.51 ± 0.03 ly (20.09 ± 0.01 pc) |
| Absolute magnitude (MV) | 4.68 |
| Details | |
| Mass | 0.969 M☉ |
| Radius | 1.2104±0.0195 R☉ |
| Luminosity | 1.0951±0.0338 L☉ |
| Temperature | 5391±40 K |
| Metallicity | 0.31 |
| Age | 11.9 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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