The Kepler-638 system contains 1 exoplanet. It is located 3232.90 light years away from the solar system.
| Mass | 0.88 solar masses |
| Radius | 0.93 solar radiae |
| Temperature | 5382 kelvin |
| Stellar Metallicity | 0.04 decimal exponent |
| Age | 11.75 billion years |
At 4.007 Earth masses, Kepler-638 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 | 4.010 Earth masses |
| Density | 3.600 grams per cubic centimeter |
| Radius | 1.830 Earth radiae |
| Semi-major Axis | 0.0632 AU |
| Eccentricity | 0 |
| Orbital Period | 6.080 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 |