The Kepler-186 system contains 5 exoplanets. It is located 579.23 light years away from the solar system.
| Mass | 0.48 solar masses |
| Radius | 0.47 solar radiae |
| Temperature | 3788 kelvin |
| Stellar Metallicity | -0.28 decimal exponent |
| Age | 4 billion years |
At less than 1.5 Earth masses, Kepler-186 b is a terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
| Mass | 1.240 Earth masses |
| Density | 5.560 grams per cubic centimeter |
| Radius | 1.070 Earth radiae |
| Semi-major Axis | 0.0343 AU |
| Eccentricity | 0 |
| Orbital Period | 3.887 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 2.099 Earth masses, Kepler-186 c 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 | 2.100 Earth masses |
| Density | 5.910 grams per cubic centimeter |
| Radius | 1.250 Earth radiae |
| Semi-major Axis | 0.0451 AU |
| Eccentricity | 0 |
| Orbital Period | 7.267 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 2.544 Earth masses, Kepler-186 d 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 | 2.540 Earth masses |
| Density | 5.090 grams per cubic centimeter |
| Radius | 1.400 Earth radiae |
| Semi-major Axis | 0.0781 AU |
| Eccentricity | 0 |
| Orbital Period | 13.343 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 2.156 Earth masses, Kepler-186 e 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 | 2.150 Earth masses |
| Density | 5.770 grams per cubic centimeter |
| Radius | 1.270 Earth radiae |
| Semi-major Axis | 0.11 AU |
| Eccentricity | 0 |
| Orbital Period | 22.408 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 1.708 Earth masses, Kepler-186 f 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. With a mass below 5 Earth masses, and a semi-major axis of 0.432 astronomical units, which is outside the habitable zone of Kepler-186, Kepler-186 f is likely an icy world.
| Mass | 1.710 Earth masses |
| Density | 5.870 grams per cubic centimeter |
| Radius | 1.170 Earth radiae |
| Semi-major Axis | 0.432 AU |
| Eccentricity | 0.04 |
| Orbital Period | 129.944 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-04 |
| Reference | Quintana et al. 2014 |