The Kepler-398 system contains 3 exoplanets. It is located 578.45 light years away from the solar system.
| Mass | 0.65 solar masses |
| Radius | 0.61 solar radiae |
| Temperature | 4493 kelvin |
| Stellar Metallicity | 0.053 decimal exponent |
| Age | 2.34 billion years |
At less than 1.5 Earth masses, Kepler-398 b is a terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
| Mass | 0.749 Earth masses |
| Density | 5.120 grams per cubic centimeter |
| Radius | 0.930 Earth radiae |
| Semi-major Axis | 0.044 AU |
| Eccentricity | 0 |
| Orbital Period | 4.081 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 less than 1.5 Earth masses, Kepler-398 c is a terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
| Mass | 1.010 Earth masses |
| Density | 5.390 grams per cubic centimeter |
| Radius | 1.010 Earth radiae |
| Semi-major Axis | 0.087 AU |
| Eccentricity | 0 |
| Orbital Period | 11.419 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 less than 1.5 Earth masses, Kepler-398 d is a terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
| Mass | 0.615 Earth masses |
| Density | 4.960 grams per cubic centimeter |
| Radius | 0.880 Earth radiae |
| Semi-major Axis | 0.0618 AU |
| Eccentricity | 0 |
| Orbital Period | 6.834 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 |