| HD 4308 b | |
| Discoverer: | Udry et al. |
| Discovery Site: | California, United States |
| Discovered: | 22 August 2005 |
| Apsis: | astron |
| Aphelion: | 0.115AU |
| Perihelion: | 0.115AU |
| Semimajor: | 0.115± |
| Eccentricity: | 0.00 ± 0.01 |
| Period: | 15.56 ± 0.02 d 0.04260 y |
| Time Periastron: | 2,453,314.70 ±2.0 |
| Arg Peri: | 359±47 |
| Semi-Amplitude: | 4.07 ± 0.2 |
| Mass: | >0.0442 (>14) |
HD 4308 b is a low-mass exoplanet orbiting around HD 4308. It is believed to have almost no orbital eccentricity.