The Kepler-129 system contains 3 exoplanets. It is located 1333.47 light years away from the solar system.
| Mass | 1.18 solar masses |
| Radius | 1.65 solar radiae |
| Temperature | 5770 kelvin |
| Stellar Metallicity | 0.29 decimal exponent |
| Age | 6.43 billion years |
At more than 10 Earth masses, Kepler-129 b 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 | 20.000 Earth masses |
| Density | 8.100 grams per cubic centimeter |
| Radius | 2.400 Earth radiae |
| Semi-major Axis | 0.13 AU |
| Eccentricity | 0.01 |
| Orbital Period | 15.790 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 more than 10 Earth masses, Kepler-129 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 | 43.000 Earth masses |
| Density | 14.800 grams per cubic centimeter |
| Radius | 2.520 Earth radiae |
| Semi-major Axis | 0.39 AU |
| Eccentricity | 0.2 |
| Orbital Period | 82.200 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 more than 50 Earth masses, Kepler-129 d is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 2637.976 Earth masses |
| Density | 7.250 grams per cubic centimeter |
| Radius | 12.600 Earth radiae |
| Semi-major Axis | 4 AU |
| Eccentricity | 0.15 |
| Orbital Period | 2646.000 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2021-09 |
| Reference | Zhang et al. 2021 |