Animation of Cassini's March 2015 Iapetus observations
Cassini observed Iapetus 33 times over the course of a week from 26 March through 1 April 2015.
Here are the 33 separate frames as a montage.
NASA / JPL-Caltech / SSI / Emily Lakdawalla
33 Cassini views of Iapetus, March and April 2015
Cassini took the images used to make these color composites through clear, ultraviolet, green, and infrared filters between 26 March and 1 April 2015. They show Iapetus' north pole above its leading hemisphere, which is coated with dark material that likely originated on Phoebe. The images are enlarged 2x from their original resolution.