The HD 109271 system contains 2 exoplanets. It is located 182.23 light years away from the solar system.
| Mass | 1.05 solar masses |
| Radius | 1.29 solar radiae |
| Temperature | 5783 kelvin |
| Stellar Metallicity | 0.1 decimal exponent |
| Age | 7.3 billion years |
At more than 10 Earth masses, HD 109271 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 | 17.162 Earth masses |
| Density | 1.180 grams per cubic centimeter |
| Radius | 4.310 Earth radiae |
| Semi-major Axis | 0.079 AU |
| Eccentricity | 0.25 |
| Orbital Period | 7.854 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2013-03 |
| Reference | Lo Curto et al. 2013 |
At more than 10 Earth masses, HD 109271 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 | 24.154 Earth masses |
| Density | 0.907 grams per cubic centimeter |
| Radius | 5.270 Earth radiae |
| Semi-major Axis | 0.196 AU |
| Eccentricity | 0.15 |
| Orbital Period | 30.930 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2013-03 |
| Reference | Lo Curto et al. 2013 |