The HD 39194 system contains 3 exoplanets. It is located 86.15 light years away from the solar system.
| Mass | 0.67 solar masses |
| Radius | 0.78 solar radiae |
| Temperature | 5205 kelvin |
| Stellar Metallicity | -0.61 decimal exponent |
| Age | 10 billion years |
At 4.004 Earth masses, HD 39194 b is a so called Super Earth. Super Earths could be terrestrial worlds like Earth, but they could also be ocean worlds or terrestrial worlds wrapped in a substantial atmosphere, in which case some refer to them as Mini Neptunes.
| Mass | 4.000 Earth masses |
| Density | 3.590 grams per cubic centimeter |
| Radius | 1.830 Earth radiae |
| Semi-major Axis | 0.056 AU |
| Eccentricity | 0.207 |
| Orbital Period | 5.637 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2021-10 |
| Reference | Unger et al. 2021 |
At more than 10 Earth masses, HD 39194 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 | 6.300 Earth masses |
| Density | 2.540 grams per cubic centimeter |
| Radius | 2.390 Earth radiae |
| Semi-major Axis | 0.103 AU |
| Eccentricity | 0.154 |
| Orbital Period | 14.030 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2021-10 |
| Reference | Unger et al. 2021 |
At 4.004 Earth masses, HD 39194 d is a so called Super Earth. Super Earths could be terrestrial worlds like Earth, but they could also be ocean worlds or terrestrial worlds wrapped in a substantial atmosphere, in which case some refer to them as Mini Neptunes.
| Mass | 4.000 Earth masses |
| Density | 3.590 grams per cubic centimeter |
| Radius | 1.830 Earth radiae |
| Semi-major Axis | 0.185 AU |
| Eccentricity | 0.333 |
| Orbital Period | 33.910 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2021-10 |
| Reference | Unger et al. 2021 |