Triton, Neptune’s largest moon, received a visit from Voyager 2 back on August 25, 1989. Voyager 2 passed within 40,000 kilometers of Triton and took lots of images. Now, for the first time, and to commemorate the 25th anniversary of this dramatic encounter, the images have been gathered into a movie. The resolution is 600 meters per pixel and is in orange, green and blue (showing Triton in approximately natural colors).
It’s a really fast flyby and the video starts with Voyager 2 about 3 days out from Triton, travelling at a speed of approx. 25 kilometers per second, passing over the unlit north pole, pivoting to see the departing moon (now visible as a diminishing crescent) and then ending about a week on the outbound trajectory. Triton is 2706 kilometers across.
The new Triton map has a resolution of 1,970 feet (600 meters) per pixel. The colors have been enhanced to bring out contrast but are a close approximation to Triton’s natural colors. Voyager’s “eyes” saw in colors slightly different from human eyes, and this map was produced using orange, green and blue filter images.