Fig. 6


a) NAC image showing the location of the Aten region on the comet’s body. The region is mainly composed of a large irregular depression. b) Cropped NAC image showing the Aten depression. Note the presence of talus-like deposits resulting from material falling into the depression and the lack of smooth deposits in the interior. Box shows the position of the close up in the upper right. Arrows highlight the rim of the depression. c) Cropped NAC image showing the different morphology between the Aten’s interior and the smooth deposits that are part of the Babi region. Note the sharp and irregular shape the depression’s scarps, which might be indicative of short-term, possibly violent, mode of formation.

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