Triton - Voyager 2

Neptune's moon Triton two days before Voyager 2 closest approach

Triton
False-color image of Neptune's moon, Triton, taken by Voyager 2 two days before closest approach. At 2,700 km diameter, Triton is Neptune's largest satellite. The smallest features resolvable in this image are about 47 km across. This image is a composite of three images taken through ultraviolet, green, and violet filters. (Voyager 2, P-34665) 

Triton;
Neptine: Satellite System
Voyager Missions