Cassini’s “Grand Finale” Saturn portrait (13 April 2017) In the early hours of 13 April 2017, Cassini captured this breathtaking and unique visage of the Saturnian system as it coasted through space in the shadow of the gas giant.
Using its Wide-Angle Camera (part of the Imaging Science Subsystem), Cassini snapped 96 individual digital photos: these images consisted of Red, Green, and Blue-filtered frames, covering a total of 32 ‘footprints’. These 32 color frames were painstakingly combined to produce the final mosaic. Cassini took nearly four hours to collect these data. In that time, the spacecraft was slowly cruising away from the planet, en route to apoapse (the point farthest from Saturn in any given orbit) of Revolution 269. The distance to the planet increased by 82,000 km in that time, and in the end, the distance to the cloud-tops equaled 650,040 km.Image: NASA / JPL-Caltech / SSI / Ian Regan