[X] My Assistant

[Jason]

The orbits of these two moonlets vary in distance from Saturn by only 50km - less than the radius of either, so they nominally share an orbit.
The inner moon (Epimetheus?) is slowly catching up with the outer (Janus?) and I understand that in January/February next year they are due to pass one another, and because of their gravitational interaction, to swap positions.
(Epimetheus speeds up relative to Janus and moves to a higher orbit, and Janus does the reverse)
Does anyone know if Cassini will be in a position to take some images which could be made into a movie of the phenomenon? - would be awesome to see the process actually happening.......

[abalone]

The inner moon (Epimetheus?) is slowly catching up with the outer (Janus?) and I understand that in January/February next year they are due to pass one another, and because of their gravitational interaction, to swap positions.

You are correct when you say that they dont actually pass each other but the one that moves to a higher orbit is the one that is doing the catching up. When it moves to a higher orbit it slows down and starts to drop behind again, but how close do they get to each other