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A Lack of Spin-Orbit Signal in the Morphology of Mercury's Large Craters
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A Lack of Spin-Orbit Signal in the Morphology of Mercury's Large Craters
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A Lack of Spin-Orbit Signal in the Morphology of Mercury's Large Craters
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Conference Proceeding
A Lack of Spin-Orbit Signal in the Morphology of Mercury's Large Craters
2022
Overview
The spatial structure of Mercury's thermal lithosphere depends on the balance between internal heat and surface temperature as controlled by solar insolation. For bodies not in a spin-orbital resonance, observed spatial temperature variations are due to internal heating variations. However, for Mercury's present 3:2 spin-orbit coupling a notable difference of ~150 K exists for the sub-skin depth temperature of the crust as a function of longitude (Fig 1B.; [1,2]). Mercury's longitudinal \"hot poles\" and \"cold poles\", in addition to the standard poles (i.e. North and South), have large temperature contrasts that could lead to systematic differences in crater size, morphology, or morphometry, especially for large impacts.
Publisher
NASA/Langley Research Center
