The HD 21693 system contains 2 exoplanets. It is located 108.46 light years away from the solar system.
| Mass | 0.8 solar masses |
| Radius | 0.91 solar radiae |
| Temperature | 5430 kelvin |
| Stellar Metallicity | 0 decimal exponent |
| Age | - billion years |
At more than 10 Earth masses, HD 21693 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 | 8.230 Earth masses |
| Density | 2.060 grams per cubic centimeter |
| Radius | 2.800 Earth radiae |
| Semi-major Axis | 0.1455 AU |
| Eccentricity | 0.12 |
| Orbital Period | 22.679 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2019-02 |
| Reference | Udry et al. 2019 |
At more than 10 Earth masses, HD 21693 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 | 17.370 Earth masses |
| Density | 1.170 grams per cubic centimeter |
| Radius | 4.340 Earth radiae |
| Semi-major Axis | 0.2586 AU |
| Eccentricity | 0.07 |
| Orbital Period | 53.736 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2019-02 |
| Reference | Udry et al. 2019 |