The Kepler-1666 system contains 2 exoplanets. It is located 4498.90 light years away from the solar system.
| Mass | 1.23 solar masses |
| Radius | 1.15 solar radiae |
| Temperature | 6293 kelvin |
| Stellar Metallicity | -0.2 decimal exponent |
| Age | 0.41 billion years |
At more than 10 Earth masses, Kepler-1666 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 | 8.660 Earth masses |
| Density | 1.990 grams per cubic centimeter |
| Radius | 2.883 Earth radiae |
| Semi-major Axis | 0.1761 AU |
| Eccentricity | 0 |
| Orbital Period | 25.848 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2021-07 |
| Reference | Armstrong et al. 2021 |
At more than 10 Earth masses, Kepler-1666 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 | 10.500 Earth masses |
| Density | 1.700 grams per cubic centimeter |
| Radius | 3.236 Earth radiae |
| Semi-major Axis | 0.2383 AU |
| Eccentricity | 0 |
| Orbital Period | 40.716 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2021-07 |
| Reference | Armstrong et al. 2021 |