The HD 204313 system contains 2 exoplanets. It is located 155.88 light years away from the solar system.
| Mass | 1.03 solar masses |
| Radius | 1.1 solar radiae |
| Temperature | 5783 kelvin |
| Stellar Metallicity | 0.16 decimal exponent |
| Age | 3.38 billion years |
At more than 50 Earth masses, HD 204313 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 1099.692 Earth masses |
| Density | 2.690 grams per cubic centimeter |
| Radius | 13.100 Earth radiae |
| Semi-major Axis | 3.07 AU |
| Eccentricity | 0.23 |
| Orbital Period | 1920.100 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 1.2 m Leonhard Euler Telescope |
| Discovery Instrument | CORALIE Spectrograph |
| Discovery Date | 2010-02 |
| Reference | Ségransan et al. 2010 |
At more than 10 Earth masses, HD 204313 c is an ice giant, a planet that is made up mostly of volatiles like water, amonia and methane, and enveloped by a dense hydrogen and helium atmosphere, much like Uranus and Neptune.
| Mass | 17.600 Earth masses |
| Density | 1.150 grams per cubic centimeter |
| Radius | 4.380 Earth radiae |
| Semi-major Axis | 0.2099 AU |
| Eccentricity | 0.155 |
| Orbital Period | 34.905 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2016-01 |
| Reference | Díaz et al. 2016 |