Shown here is an illumination map of Mercury's south polar region. The map is colored on the basis of the percentage of time that a given area is sunlit; areas appearing black in the map are regions of permanent shadow. This map was created by using 89 wide-angle camera (WAC) images of Mercury's south polar region acquired by the Mercury Dual Imaging System (MDIS) over one complete Mercury solar day (176 Earth days) which can be viewed in this movie. Radar-bright deposits, which may be water ice, collocate with regions of permanent shadow.
Scale: The large crater near Mercury's south pole, Chao Meng-Fu, has a diameter of 180 km
Map Information: This illumination map is shown in polar stereographic projection, extending northward to 73° S, and 0° longitude is at the top
Map credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington/Byrne et al.
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