Prediction of Saturn's gravity harmonics and ring mass sensitivity for the proximal orbits of the Cassini Solstice mission

Physics

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Scientific paper

The Cassini-Huygens spacecraft continues to explore the Saturn system in the extended mission named "Solstice". This 7-year extension will culminate with 22 proximal orbits that have periapses located between the innermost D-ring and the upper layers of Saturn's atmosphere. Six of these orbits will most likely be used for the gravity field mapping and ring mass measurements. Our current study shows that the data obtained during these flybys will result in ~25% accuracy for the B-ring mass. Furthermore, we will be able to measure the even zonal harmonics to at least 12th degree. The Solstice mission ends with a Titan flyby that sets the spacecraft on the final impact trajectory with Saturn.

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