What is Neptune's main satellite?
Neptune XIV it during its 1989 flyby, due to its dimness. Given that the relevant images have long been available to the public, the discovery could have been made by anyone. Neptune XIV is the first moon of Neptune to be discovered since September 2003, when Psamathe was discovered. Neptune's largest moon, Triton, has a retrograde and inclined orbit. It is hypothesized that Neptune captured it from the Kuiper belt well after Neptune's original satellite system formed. The pre-existing moons' orbits would have been shifted by this event, leading to the ejection of some moons and the collisional destruction of others. Neptune's
Neptune The 3:4, 3:5, 4:7 and 2:5 resonances are less populated. Neptune has a number of known trojan objects occupying both the Sun–Neptune and Lagrangian points—gravitationally stable regions leading and trailing Neptune in its orbit, respectively. Neptune trojans can be viewed as being in a 1:1 resonance with Neptune. Some Neptune trojans are remarkably stable in their orbits, and are likely to have formed alongside Neptune rather than being captured. The first object identified as associated with Neptune's trailing Lagrangian point was . Neptune also has a temporary quasi-satellite, . The object has been a quasi-satellite of Neptune for about 12,500