In this animation, Rosetta can be seen approaching Mars (red planet) and then swinging behind Mars with respect to Earth (blue planet) and the Sun (at centre), for a net reduction in velocity. Closest approach (250 km) is expected at 01:57:59.0 UTC, 25 February, +/- 1.3 seconds.
The animation clearly shows Rosetta swinging behind Mars to be eclipsed with respect to the Sun and occultated with respect to the Earth.