Orbital parameters for several of Neptune's more distant moons.
Neso was discovered in 2002 by Matthew J. Holman, John J. Kavelaars, Tommy Grav, Wesley C. Fraser, and Dan Milisavljevic using the 4-m Blanco telescope at Cerro Tololo Observatory in Chile.
Very little is known about Neso, another of Neptune's extremely distant irregular moons. Neso's eccentric orbit takes it millions of miles from the ice giant. The moon's orbit is among the most distant from its planet than any other known moon in our solar system.
The small moon shares similar orbital parameters with another moon of Neptune―Psamathe. Both Neso and Psamathe may be fragments from the break-up of a larger moon billions of years ago.
How Neso Got its Name
Neso like many of the outer satellites of Neptune, is named after one of the Nereids. Neso was originally designated S/2002 N 4.