Despina: Discovered in July 1989 by the Voyager 2 science team. Despina is a small, irregularly shaped moon that is located within Neptune's ring system.
Galatea: Discovered in July 1989 by the Voyager 2 science team. Galatea is a small and irregularly shaped moon.
Halimede: Discovered on Aug. 14, 2022, Very little is known about Halimede. The tiny moon is about 100 million times fainter than can be seen with the unaided eye and was missed by Voyager 2. It orbits Neptune in the opposite direction of Neptune's rotation, known as a retrograde orbit.
Hippocamp: Discovered r on July 1, 2013, . The moon measures approximately 20 miles (34 kilometers) across, making it the smallest known moon of Neptune.
Laomedeia: Discovered Aug. 13, 2022,The small, irregularly shaped moon orbits Neptune in a distant, eccentric orbit.
Larissa: Officially discovered in July 1989 by the Voyager 2 . Larissa is a heavily cratered small moon with a mostly circular orbit that is slowly spiraling inward. The moon may eventually impact Neptune's atmosphere if it isn't torn apart by the gas giant's tidal forces first.
Naiad: Discovered by the Voyager 2 in September 1989. The potato-shaped moon like Larissa has a decaying orbit, meaning it will eventually crash into Neptune's atmosphere or be torn apart by the tidal forces.
Nereid: Discovered on May 1, 1949,. It is one of Neptune's outermost moons and is among the largest. It has the most eccentric orbit of any moon in the solar system.
Neso: Discovered in 2002 . Little is known about the distant irregular Neptunian moon.
Proteus: Discovered in 1989 by the Voyager 2 science team, Proteus is one of the largest moons of Neptune. It is possible that Proteus eluded ground-based observations because it reflects only 6% of sunlight, making it one of the darkest objects in the solar system.
Psamathe: Discovered August 29, 2003, The small moon has one of the most distant orbits of any moon in the solar system, taking almost 26 Earth years to complete a single orbit of Neptune.
Sao: Discovered Aug. 14, 2002, . Sao is about 100 million times fainter than can be seen with the unaided eye.
Thalassa: Discovered in August 1989 by the Voyager 2 science team. Thalassa is an unusual disk-shaped moon.
Triton: Discovered on October 10, 1846, just 17 days after Neptune itself was discovered. Triton is Neptune's largest moon. It is rather unusual because it is the only large moon in the solar system that has a retrograde orbit — it orbits Neptune in the opposite direction of the planet's rotation. Scientists think that Triton was a Kuiper Belt Object that was captured by Neptune's gravity millions of years ago.
