Mini-Neptune · HD 20781
HD 20781 d
ExoplanetsDiscovered 2019
Scientific overview
HD 20781 d is a mini-neptune orbiting HD 20781, completing an orbit every 29 days, about 117 light-years from Earth. It was discovered in 2019 using the radial velocity method.
Host star
Planetary system — HD 20781 system
View the HD 20781 system (4 known planets).
| Planet | Class | Radius (R⊕) | Period (d) | Distance (ly) |
|---|---|---|---|---|
| HD 20781 bRadial Velocity · 2019 | Terrestrial planet | 1.21 | 5.3135 | 117 |
| HD 20781 cRadial Velocity · 2019 | Super-Earth | 2.17 | 13.8905 | 117 |
| HD 20781 dRadial Velocity · 2019 | Mini-Neptune | 3.25 | 29.158 | 117 |
| HD 20781 eRadial Velocity · 2019 | Mini-Neptune | 3.83 | 85.5073 | 117 |
Discovery and detection
Knowledge connections
- OrbitsHD 20781
- Member of systemHD 20781 system
- Discovered by methodRadial Velocity Method
- Discovered atLa Silla Observatory
- Catalogued inNASA Exoplanet Archive