| Proper Name | None | | Designations | K2-18 b | | Classification | Super Earth | | Orbital Period | 32 days, 22 hours, 33 minutes | | Mean Distance from K2-18 | 21.4 million km
0.14 AU | | Mass | 8.0 x Earth | | Diameter | 2.3 x Earth | | Temperature | Not known | | Parent star | K2-18, red star in Leo | | Other planets in this system |
K2-18 c, super Earth
| | Notes | The outermost of two known planets orbiting the faint red star K2-18. K2-18 b orbits within the star's habitable zone, and has been hypothesised to belong to the hycean class of planets, with an ocean of liquid water and a hydrogen-rich atmosphere. Organic molecules have been detected in the planet's atmosphere that might potentially indicate the existence of life in its oceans, though these results are as yet far from conclusive. |
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