The Kepler-446 system contains 3 exoplanets. It is located 314.22 light years away from the solar system.
| Mass | 0.22 solar masses |
| Radius | 0.24 solar radiae |
| Temperature | 3359 kelvin |
| Stellar Metallicity | -0.3 decimal exponent |
| Age | 3.72 billion years |
At 2.859 Earth masses, Kepler-446 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 | 2.860 Earth masses |
| Density | 4.660 grams per cubic centimeter |
| Radius | 1.500 Earth radiae |
| Semi-major Axis | 0.0182 AU |
| Eccentricity | 0 |
| Orbital Period | 1.565 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2015-03 |
| Reference | Muirhead et al. 2015 |
At less than 1.5 Earth masses, Kepler-446 c is a terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
| Mass | 1.410 Earth masses |
| Density | 5.670 grams per cubic centimeter |
| Radius | 1.110 Earth radiae |
| Semi-major Axis | 0.0283 AU |
| Eccentricity | 0 |
| Orbital Period | 3.036 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2015-03 |
| Reference | Muirhead et al. 2015 |
At 2.391 Earth masses, Kepler-446 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 | 2.390 Earth masses |
| Density | 5.340 grams per cubic centimeter |
| Radius | 1.350 Earth radiae |
| Semi-major Axis | 0.0403 AU |
| Eccentricity | 0 |
| Orbital Period | 5.149 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2015-03 |
| Reference | Muirhead et al. 2015 |