Triton - Voyager 2

Neptune's moon Triton from 500,000 km

Triton
Voyager 2 raw image of Neptune's satellite Triton taken from roughly 500,000 km. Evidence of complex surface features can be seen from this distance. At 2,700 km diameter, Triton is by far Neptune's largest moon. The image was taken through the orange filter of the narrow angle camera. (Voyager 2, 11386.39) 

Triron
Voyager Missions