Kepler-182
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Kepler-182 is a star in the constellation of Cygnus. The star is notable for having two planets in the circumstellar habitable zone.[citation needed]
With a mass the same as the Sun's and an age of five billion years, Kepler-182 has exhausted its core hydrogen and expanded away from the main sequence. It is now a subgiant contracting towards the red giant branch. It has a radius of 1.4 R☉ and an effective temperature of 5,883 K, giving a bolometric luminosity of 2.2 L☉.
Two exoplanets orbit it. The first, Kepler-182b, has a radius of 0.23 RJ and orbits the parent star every 9.8 days. The second, Kepler-182c, has a radius of 0.306 RJ and orbits the parent star every 20.7 days.
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | — | 0.096 | 9.825792 ± 0.000062 | — | — | 0.23 ± 0.105 RJ |
| c | — | 0.157 | 20.684342 ± 0.000097 | — | — | 0.306 ± 0.136 RJ |