The K2-129 system contains 1 exoplanet. It is located 90.66 light years away from the solar system.
| Mass | 0.36 solar masses |
| Radius | 0.36 solar radiae |
| Temperature | 3459.09 kelvin |
| Stellar Metallicity | - decimal exponent |
| Age | - billion years |
At less than 1.5 Earth masses, K2-129 b is a terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
| Mass | 1.120 Earth masses |
| Density | 5.470 grams per cubic centimeter |
| Radius | 1.040 Earth radiae |
| Semi-major Axis | 0.057 AU |
| Eccentricity | 0.13 |
| Orbital Period | 8.239 days |
| Discovery Method | Transit |
| Discovery Facility | K2 |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2017-11 |
| Reference | Dressing et al. 2017 |