K2-66b
K2-66b is a confirmed mega-Earth orbiting the subgiant K2-66, about 520 parsecs (1,700 ly) from Earth in the direction of Aquarius. It is an extremely hot and dense planet heavier than Neptune, but with only about half its radius.
| Discovery | |
|---|---|
| Discovered by | K2 |
| Discovery date | 2017 |
Detection method | Transit |
| Orbital characteristics | |
Semi-major axis | 0.05983±0.00072 AU |
Orbital period (sidereal) | 5.06963±0.00081 d |
| Inclination | 86.6+4.4 −2.4° |
| Star | K2-66 |
| Physical characteristics | |
Mean radius | 2.49 R🜨 |
| Mass | 0.06702 MJ |
Mean density | 7.6 g/cm3 |
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