The Cassini-Huygens mission ended with a plunge into Saturn's atmosphere in September 2017 sending back data until Cassini tumbled and vaporized in Saturn's atmosphere. Preceding the final plunge, Cassini executed 22 highly inclined Grand Finale orbits with closest approaches between the innermost rings and atmosphere. Many surprises and new discoveries were made in this previously unexplored territory, and during the final year of the mission, and many new findings are still being made in Cassini’s 13 years of incredible data.

This session will highlight new Cassini discoveries from multiple disciplines, including magnetospheric physics, outer solar system planetary and ring science, and space physics, revealed by data collected during this once-in-a-lifetime opportunity to explore Saturn in a region where no spacecraft had flown before. Topics will include new results on Saturn's gravitational and magnetic fields; Saturn's ring mass; first in-situ sampling of main ring particles, Saturn's plasma environment, upper atmosphere and exosphere; high resolution imaging, spectra and radar measurements of both Saturn and its rings. Highlights from the last year of the mission and other new findings will be presented.

Convener: Linda Spilker | Co-conveners: David H. Atkinson, Athena Coustenis, Scott Edgington, Jonathan I. Lunine
| Attendance Thu, 11 Apr, 14:00–15:45
Hall X4

Attendance time: Thursday, 11 April 2019, 14:00–15:45 | Hall X4

Chairperson: Linda Spilker
X4.166 |
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| Highlight
Linda Spilker and Scott Edgington
X4.167 |
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Hsiang-Wen Hsu and James O'Donoghue
X4.168 |
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He/H2 ratio in the atmosphere of Saturn
J. Hunter Waite, Jared Bell, Kelly Miller, and Chris Glein
X4.169 |
David Southwood, Greg Hunt, and Michele Dougherty
X4.170 |
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Pontus C. Brandt, Donald G. Mitchell, Hari Nair, Simon Wing, Philippe Zarka, Baptise Cecconi, Philippe Louarn, William Kurth, Gregg W. Hallinan, and Kunhiro Keika
X4.171 |
Explaining Saturn Ring Textures with a Predator-Prey Model
Larry W. Esposito, Sreenivas Madhusudhanan, Prasanna Madhusudhanan, Morgan Rehnberg, and Zarah Brown
X4.172 |
Athena Coustenis, Donald Jennings, Richard Achterberg, Panayotis Lavvas, Georgios Bampasidis, Conor Nixon, and F. Michael Flasar
X4.173 |
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Donald E. Jennings, Valeria Cottini, Conor A. Nixon, Athena Coustenis, and Tetsuya Tokano
X4.174 |
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Alexis Coyette, Rose-Marie Baland, and Tim Van Hoolst