H2O (top) and CO2 (bottom) relative activity distribution at the surface of the nucleus described with a 25-term (order 4) spherical harmonic expansion at the surface of the nucleus. The H2O peak emission is located in the Hapi region, while the CO2 emission is maximum south of the Imhotep region and above the Khonsu region following the nomenclature from Thomas et al. (2015).
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