HD 20781 c
HD 20781 c is a hot Neptune with 15.8 Earth masses. It is the outermost planet of orbiting its parent star HD 20781 in about 0.3456 astronomical units in somewhat eccentric orbit.[1] With the same composition as Neptune, it would have a radius of 3.79 earths. With the same composition as Earth, it would have a radius of 2.08 earths. It orbits near the inner edge of the habitable zone.
| Discovery | |
|---|---|
| Discovery date | 2011 |
| Radial velocity | |
| Orbital characteristics | |
| 0.3456 ± 0.0047 AU | |
| Eccentricity | 0.28 ± 0.09 |
| 85.131 ± 0.1161 d | |
| Physical characteristics | |
| Mass | 0.0496 Mj |
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