HD 40307
HD 40307 is a K2.5 V star 42.2 light years away with 5 known planets. The first was found in 2009 and the latest in 2013.
Open in 3DPlanets
| Planet | Orbital period | Distance from star | Radius (Earths) | Mass (Earths) | Found | Method |
|---|---|---|---|---|---|---|
| HD 40307 b | 4.312 days | 0.0468 AU | at least 4 | 2009 | Radial Velocity | |
| HD 40307 c | 9.618 days | 0.0799 AU | at least 6.6 | 2009 | Radial Velocity | |
| HD 40307 d | 20.43 days | 0.1321 AU | at least 9.5 | 2009 | Radial Velocity | |
| HD 40307 f | 51.76 days | 0.247 AU | at least 5.2 | 2013 | Radial Velocity | |
| HD 40307 g (disputed) | 197.8 days | 0.6 AU | at least 7.1 | 2013 | Radial Velocity |
"At least" is a minimum mass. Radial velocity can only measure mass times the sine of the orbit's tilt.
Star
- Spectral type K2.5 V
- 4,956 K surface temperature
- 0.77 times the mass of the Sun
- 0.7167 times the radius of the Sun
Data from the NASA Exoplanet Archive, as of October 3, 2026. In the 3D view sizes and distances are compressed and every orbit is drawn in the same plane. Where each planet sits along its orbit is made up.