Proteus

Proteus is the second largest Neptunian moon discovered by the Voyager 2 spacecraft. It’s name Proteus was named after Proteus the Greek God. 
Proteus orbits Neptune at 4.75 times Neptune's equator. 
=== Discovery ===
Bradford A. Smith announced the discovery on July 7, 1989. On September 16, 1991 S/1981 N 1 was officially named Proteus
=== Orbital data ===
Proteus orbits Neptune at ~117,647 km it also has an inclination of about 0.5 degrees and is tidally locked. Proteus might have caused orbital resonance with Larissa several hundred million years ago.
Category:Moons
Category:Neptunian Moon
Category:Inner Moon of Neptune
Category:Objects Not in Hydrostatic Equilibrium
Category:Outer Solar System Object
Category:Named Objects
Category:Named Moons
Category:Numbered Objects
Category:Numbered Moons
Category:Objects Visited by Spacecraft