displacement: Janus passing Epimetheus, photographed by Cassini, 1st February 2010.
Each successive frame is superimposed, displaced to the right. Epimetheus is held in centre frame (forming a horizontal line) as Janus moves behind it (diagonal line).
The arcs (left, right, and faintly above) are more of a mystery. I wondered if they might be background stars, apparently moving due to the motion of Cassini with respect to Epimetheus. But, on consideration, I think distant stars would exhibit far less apparent motion than that.
Image credit: NASA/JPL/SSI. Animation: AgeOfDestruction.
transference: Janus and Dione, photographed by Cassini 17th January 2008.
More Janus & …
Image credit: NASA/ESA/SSI.
life in miniature: Janus (centre) and Mimas (top left), photographed by Cassini, 22nd October 2011.
See also: Reminiscent? Identification of Mimas made by distinguishing marks.
Image credit: NASA/ESA/SSI.
Hanging: Janus against Saturn, photographed by Cassini space probe, 25th September 2006.
Janus is a small (200km) inner moon that apparently shares an orbit with Epimetheus somehow. Once I figure it out, and find a funky image related to it, you know where to find it.
Image credit: NASA/JPL/Space Science Institute.





