Prometheus and the F Ring . ... 8.01.2016 . ... Credit Copyright: Cassini Imaging Team , SSI , JPL , ESA , NASA Explanation: In Greek myth Prometheus was a Titan, known for bringing fire from Mount Olympus. ... One of the highest resolution views of Prometheus, this image of its pocked surface posing with the thin F ring in the background was taken during the Cassini spacecraft's close approach on December 6, 2015. Prometheus is about 86 kilometers (50 miles) across. ... NASA Official: Jay Norris. ...