| HD 47186 b | |
| Discoverer: | Bouchy et al. |
| Discovery Site: |  La Silla Observatory |
| Discovered: | June 16, 2008 |
| Apsis: | astron |
| Aphelion: | 0.052AU |
| Perihelion: | 0.048AU |
| Semimajor: | 0.05AU |
| Eccentricity: | 0.038 ± 0.02 |
| Period: | 4.0845 ± 0.0002 d |
| Avg Speed: | 130 |
| Time Periastron: | 2,454,562.77 ± 0.08 |
HD 47186 b is a “hot Neptune” extrasolar planet located approximately 123 light years away in the constellation of Canis Major, orbiting the star HD 47186. This planet has a minimum mass of 22.78 times that of Earth and orbits very close to the star at a similar distance from the star as 51 Pegasi b is from 51 Pegasi. As in consequence, it takes 4.0845 days to complete an orbit with an eccentricity of 0.038, which is similar to the 5.66 year-period planet HD 70642 b.