At last: Rosetta's Mars flyby photos have been released! | The Planetary Society
http://www.planetary.org/blogs/emily-lakdawalla/2012/3340.html
On February 24, 2007, the European Space Agency's Rosetta spacecraft passed by Mars, the second of four planetary gravity-assist flybys on its long route to a 2014 rendezvous with comet Churyumov-Gerasimenko. At the time, they released two photos from the main science camera, OSIRIS. One was a very pretty high-resolution view of Mars and the other a nifty little animation of Phobos flying over Mars.
We knew from the published Rosetta Mars flyby timeline that OSIRIS took a great many more pictures during that time, but no more OSIRIS images were ever released by ESA, until now. The OSIRIS principal investigator was notoriously tight-fisted with data, but he's now retired, and his replacement Holger Sierks has apparently unclogged the data pipeline. At the end of November, they suddenly released a huge quantity of data covering the first two (out of three) Earth flybys, the Mars flyby, and several sets of data from cruise periods between these encounters. Such riches!
As Mars loomed in Rosetta's forward view, it caught Phobos in the act of transiting the planet. You may need to enlarge the view to see Phobos' tiny dark speck.
ESA / MPS / UPD / LAM / IAA / RSSD / INTA / UPM / DASP / IDA / processed by Emily Lakdawalla