This image of Phobos has been obtained by the High Resolution Stereo Camera (HRSC) on board ESA’s Mars Express on 8 August 2008 (orbit 5908), at a distance of 1024 km from the moon’s centre. The image was taken using HRSC’s green channel, at a resolution of 41 m/pixel.
The squares represent the areas also imaged by the Super Resolution Channel (SRC). A non-annotated version can be downloaded here.