The Kepler-299 system contains 4 exoplanets. It is located 3431.94 light years away from the solar system.
| Mass | 0.95 solar masses |
| Radius | 1.03 solar radiae |
| Temperature | 5617 kelvin |
| Stellar Metallicity | -0.01 decimal exponent |
| Age | 0.4 billion years |
At 2.302 Earth masses, Kepler-299 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 | 2.300 Earth masses |
| Density | 5.500 grams per cubic centimeter |
| Radius | 1.320 Earth radiae |
| Semi-major Axis | 0.04 AU |
| Eccentricity | 0 |
| Orbital Period | 2.927 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-299 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 | 7.510 Earth masses |
| Density | 2.220 grams per cubic centimeter |
| Radius | 2.650 Earth radiae |
| Semi-major Axis | 0.07 AU |
| Eccentricity | 0 |
| Orbital Period | 6.886 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 4.134 Earth masses, Kepler-299 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 | 4.120 Earth masses |
| Density | 3.520 grams per cubic centimeter |
| Radius | 1.860 Earth radiae |
| Semi-major Axis | 0.118 AU |
| Eccentricity | 0 |
| Orbital Period | 15.055 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 4.166 Earth masses, Kepler-299 e 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 | 4.160 Earth masses |
| Density | 3.500 grams per cubic centimeter |
| Radius | 1.870 Earth radiae |
| Semi-major Axis | 0.22 AU |
| Eccentricity | 0 |
| Orbital Period | 38.285 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 |