The Kepler-840 system contains 1 exoplanet. It is located 3660.09 light years away from the solar system.
| Mass | 1.04 solar masses |
| Radius | 1.06 solar radiae |
| Temperature | 5920 kelvin |
| Stellar Metallicity | 0 decimal exponent |
| Age | 3.89 billion years |
At more than 50 Earth masses, Kepler-840 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 43000.000 Earth masses |
| Density | 47.500 grams per cubic centimeter |
| Radius | 17.070 Earth radiae |
| Semi-major Axis | 0.0355 AU |
| Eccentricity | 0 |
| Orbital Period | 2.496 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 |