The HD 216520 system contains 2 exoplanets. It is located 63.77 light years away from the solar system.
| Mass | 0.82 solar masses |
| Radius | 0.76 solar radiae |
| Temperature | 5103 kelvin |
| Stellar Metallicity | -0.16 decimal exponent |
| Age | 6 billion years |
At more than 10 Earth masses, HD 216520 b 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 | 10.260 Earth masses |
| Density | 1.750 grams per cubic centimeter |
| Radius | 3.180 Earth radiae |
| Semi-major Axis | 0.198 AU |
| Eccentricity | 0.09 |
| Orbital Period | 35.450 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2021-01 |
| Reference | Burt et al. 2021 |
At more than 10 Earth masses, HD 216520 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 | 9.440 Earth masses |
| Density | 1.860 grams per cubic centimeter |
| Radius | 3.030 Earth radiae |
| Semi-major Axis | 0.528 AU |
| Eccentricity | 0.12 |
| Orbital Period | 154.430 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2021-01 |
| Reference | Burt et al. 2021 |