Haumea has 2 known moons.
| 1. Namaka | 2. Hi´iaka |
| Name | Namaka |
|---|---|
| Discovery date | 2005 (Team of Keck Observatory) |
| Semi-major axis | 25 657 ± 91 km |
| Diameter | 160 km |
| Orbital period (Length of a year) |
18.2783 ± 0.0076 Earth days |
| Name | Hi´iaka |
|---|---|
| Discovery date | 2005 (Team of Keck Observatory) |
| Semi-major axis | 49 880 ± 198 km |
| Diameter | ~ 320 km |
| Orbital period (Length of a year) |
49.462 ± 0.083 Earth days |