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Counting Caloris
Date acquired: February 10, 2012
Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington This image is a portion of the MDIS global mosaic basemap that was acquired during MESSENGER's first year in orbit. Caloris basin, the largest young impact crater on Mercury, dominates the scene. With an east-west diameter of 1,640 km, Caloris hosts a wide variety of tectonic features, including graben, ridges, and Pantheon Fossae. MESSENGER team members are in the process of mapping the tectonic features within the Caloris basin and deciphering their complicated relationships.