Posted by Jason Major
If you thought Pan resembled a UFO, Atlas is even more saucer-shaped! Slightly larger at about 19 miles across, Saturn’s moon Atlas was passed by NASA’s Cassini spacecraft on April 12, 2017, coming within about 9,000 miles. The images above are a collection of eight from Cassini’s closest approach. Like its smaller sibling Pan, Atlas has a flattened shape, created by the presence of a large buildup of icy material around its equator.
Atlas orbits Saturn just outside the edge of the A ring, taking about 14 hours to complete a full orbit.
UPDATE: Here’s a color image of Atlas made from raw images acquired by Cassini on April 12 in infrared, green, and UV wavelengths. I’ve adjusted it to bring out some surface detail and (hopefully) closer match actual visible light.