Exoplanet CatalogExoplanet HD 40307 g
Radius2.56 R⊕Earth = 1
Mass7.1 M⊕Earth = 1
Orbital period197.80 d
Equilibrium temp.255 K≈ -18 °C
Distance42.2 ly
Discovered2013Radial Velocity
Size compared (radius, Earth = 1)
1.00
2.56
3.88
11.21
Where it sits among all planets (percentile)
43%
41%
87%
8%
3%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of HD 40307 (5)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| HD 40307 b | 4.31 | – | 1,189.0 | 910 | 2009 |
| HD 40307 c | 9.62 | – | 1,868.5 | 696 | 2009 |
| HD 40307 d | 20.43 | – | 1,775.4 | 541 | 2009 |
| HD 40307 f | 51.76 | 2.13 | 5.2 | 398 | 2013 |
| HD 40307 g | 197.80 | 2.56 | 7.1 | 255 | 2013 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| HD 40307 | K2.5 V | 4,956 | 0.72 | 0.77 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.