| SATELLITE | DISTANCE(000 km) | RADIUS(km) | MASS(kg) | DISCOVERER | DATE |
| Naiad | 48 | 29 | ? | Voyager 2 | 1986 |
| Thalassa | 50 | 40 | ? | Voyager 2 | 1986 |
| Despina | 53 | 74 | ? | Voyager 2 | 1986 |
| Galatea | 62 | 79 | ? | Voyager 2 | 1986 |
| Larissa | 74 | 96 | ? | Voyager 2 | 1986 |
| Proteus | 118 | 209 | ? | Voyager 2 | 1986 |
| Triton | 355 | 1350 | 2.14e22 | Lassell | 1846 |
| Nereid | 5509 | 170 | ? | Kuiper | 1949 |
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