List of Neptune's Moons
Neptune has 14 moons orbiting it. These moons are listed below.
| Name of Moon | Diameter | Orbital Distance | Length of Orbit | Discovered | Discoverer | Group |
|---|---|---|---|---|---|---|
| Naiad |
60 km
(96 x 60 x 52 km) 38 miles |
48,277 km 29,998 miles |
7 hours | 1989 | Voyager Imaging Team | Inner |
| Thalassa |
81 km
(108 x 100 x 52 km) 51 miles |
50,075 km 31,115 miles |
7.5 hours | 1989 | Voyager Imaging Team | Inner |
| Despina |
156 km
(180 x 148 x 128 km) 97 miles |
52,526 km 32,638 miles |
8 hours | 1989 | Voyager Imaging Team | Inner |
| Galatea |
175 km
(204 x 184 x 144 km) 109 miles |
61,653 km 38,309 miles |
10 hours | 1989 | Voyager Imaging Team | Inner |
| Larissa |
194 km
(216 x 204 x 168 km) 121 miles |
73,548 km 45,701 miles |
13 hours | 1981 | Harold J. Reitsema, William B. Hubbard, Larry A. Lebofsky, David J. Tholen | Inner |
| Hippocamp |
34 km
21 miles |
105,300 km 65,430 miles |
23 hours | 2013 | Mark Robert Showalter and team | Inner |
| Proteus |
420 km
(436 x 416 x 402 km) 261 miles |
117,647 km 73,102 miles |
27 hours | 1989 | Voyager Imaging Team | Inner |
| Triton |
2,707 km
1,682 miles |
354,760 km 220,437 miles |
141 hours | 1846 | William Lassell | Major |
| Nereid |
340 km
211 miles |
5,513,400 km 3,425,861 miles |
360 days | 1949 | Gerard Kuiper | Prograde |
| Halimede |
62 km
39 miles |
15,730,000 km 9,774,150 miles |
1880 days | 2002 | Matthew J. Holman, J. J. Kavelaars, Tommy Grav, Wesley C. Fraser, Dan Milisavljevic | Retrograde |
| Sao |
44 km
27 miles |
22,420,000 km 13,931,115 miles |
2914 days | 2002 | Matthew J. Holman, J. J. Kavelaars, Tommy Grav, Wesley C. Fraser, Dan Milisavljevic | Prograde |
| Laomedeia |
42 km
26 miles |
23,570,000 km 14,645,691 miles |
3168 days | 2002 | Matthew J. Holman, J. J. Kavelaars, Tommy Grav, Wesley C. Fraser, Dan Milisavljevic | Prograde |
| Psamathe |
38 km
24 miles |
46,700,000 km 29,017,979 miles |
9117 days | 2003 | Scott S. Sheppard, David C. Jewitt, Jan Kleyna | Retrograde |
| Neso |
60 km
37 miles |
48,390,000 km 30,068,094 miles |
9374 days | 2002 | Matthew J. Holman, Brett J. Gladman and teams | Retrograde |
