The Kepler-306 system contains 4 exoplanets. It is located 2529.92 light years away from the solar system.
| Mass | 0.81 solar masses |
| Radius | 0.72 solar radiae |
| Temperature | 4954 kelvin |
| Stellar Metallicity | -0.08 decimal exponent |
| Age | 2.63 billion years |
At 2.926 Earth masses, Kepler-306 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 | 2.920 Earth masses |
| Density | 4.570 grams per cubic centimeter |
| Radius | 1.520 Earth radiae |
| Semi-major Axis | 0.05 AU |
| Eccentricity | 0 |
| Orbital Period | 4.646 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-03 |
| Reference | Rowe et al. 2014 |
At more than 10 Earth masses, Kepler-306 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 | 6.120 Earth masses |
| Density | 2.590 grams per cubic centimeter |
| Radius | 2.350 Earth radiae |
| Semi-major Axis | 0.067 AU |
| Eccentricity | 0 |
| Orbital Period | 7.240 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-03 |
| Reference | Rowe et al. 2014 |
At more than 10 Earth masses, Kepler-306 d 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 | 6.660 Earth masses |
| Density | 2.430 grams per cubic centimeter |
| Radius | 2.470 Earth radiae |
| Semi-major Axis | 0.12 AU |
| Eccentricity | 0 |
| Orbital Period | 17.327 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-03 |
| Reference | Rowe et al. 2014 |
At more than 10 Earth masses, Kepler-306 e 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 | 5.770 Earth masses |
| Density | 2.710 grams per cubic centimeter |
| Radius | 2.270 Earth radiae |
| Semi-major Axis | 0.227 AU |
| Eccentricity | 0 |
| Orbital Period | 44.841 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-03 |
| Reference | Rowe et al. 2014 |