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Constraining Time Variations in Enceladus's Water-vapor Plume with Near-infrared Spectra from Cassini's Visual and Infrared Mapping Spectrometer

Hedman, M. M.; Bockelée-Morvan, D.; Capaccioni, F. +2 more

Water vapor produces a series of diagnostic emission lines in the near-infrared between 2.60 and 2.75 µm. The Visual and Infrared Mapping Spectrometer (VIMS) on board the Cassini spacecraft detected this emission signal from Enceladus's plume, and so VIMS observations provide information about the variability of the plume's water-vapor conte…

Cassini UVIS Observations of the Enceladus Auroral Footprint on Saturn in 2017

Pryor, Wayne R.; Magalhães, Fabiola P.; Lamy, Laurent +5 more

Ultraviolet Imaging Spectrograph (UVIS) observations show the Enceladus auroral footprint on Saturn on 2017 September 14, near the end of the Cassini mission. A series of Saturn north polar auroral images were obtained by slowly slewing the Cassini spacecraft at right angles to the UVIS long slit. The images were limb-fit to improve the spacecraft…