The Kepler-598 system contains 2 exoplanets. It is located 2221.40 light years away from the solar system.
| Mass | 0.87 solar masses |
| Radius | 0.86 solar radiae |
| Temperature | 5307 kelvin |
| Stellar Metallicity | 0.02 decimal exponent |
| Age | 7.59 billion years |
At 2.859 Earth masses, Kepler-598 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 | 2.860 Earth masses |
| Density | 4.660 grams per cubic centimeter |
| Radius | 1.500 Earth radiae |
| Semi-major Axis | 0.0438 AU |
| Eccentricity | 0 |
| Orbital Period | 3.702 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2016-05 |
| Reference | Morton et al. 2016 |
At more than 10 Earth masses, Kepler-598 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 | 9.400 Earth masses |
| Density | 1.870 grams per cubic centimeter |
| Radius | 3.024 Earth radiae |
| Semi-major Axis | 0.3576 AU |
| Eccentricity | 0 |
| Orbital Period | 86.495 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2021-07 |
| Reference | Armstrong et al. 2021 |