The HD 203473 system contains 1 exoplanet. It is located 236.92 light years away from the solar system.
| Mass | 1.12 solar masses |
| Radius | 1.33 solar radiae |
| Temperature | 5780 kelvin |
| Stellar Metallicity | 0.19 decimal exponent |
| Age | 5.22 billion years |
At more than 50 Earth masses, HD 203473 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 2479.074 Earth masses |
| Density | 6.810 grams per cubic centimeter |
| Radius | 12.600 Earth radiae |
| Semi-major Axis | 2.73 AU |
| Eccentricity | 0.289 |
| Orbital Period | 1552.900 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2018-11 |
| Reference | Ment et al. 2018 |