000005170 001__ 5170
000005170 005__ 20210125135923.0
000005170 037__ $$aPOSTER-2021-0009
000005170 100__ $$aVan Hoolst, Tim
000005170 245__ $$aThe rotation and interior of Ganymede
000005170 260__ $$c2020
000005170 269__ $$c2020-05-04
000005170 520__ $$aThe rotation rate of Ganymede, the largest satellite of Jupiter, is on average equal to its orbital mean motion but cannot be constant on orbital time scale as a result of the gravitational torque exerted by Jupiter on the moon. Here we discuss small deviations from the average rotation rate, evaluate polar motion, and discuss Ganymede's obliquity. We examine different time scales, from diurnal to long-period, and assess the potential of using rotation as probes of the interior structure. The ESA JUICE (JUpiter ICy moons Explorer) mission will accurately measure the rotation of Ganymede during its orbital phase around the satellite starting in 2032. We report on different theoretical aspects of the rotation for realistic models of the interior of Ganymede, include tidal deformations and take into account the low-degree gravity field and topography of Ganymede. We assess the advantages of a joint use of rotation and tides to constrain the satellite's interior structure, in particular its ice shell and ocean.
000005170 536__ $$aProdex/$$cProdex/$$fProdex
000005170 594__ $$aNO
000005170 700__ $$aBaland, Rose-Marie
000005170 700__ $$aCoyette, Alexis
000005170 700__ $$aYseboodt, Marie
000005170 773__ $$t22nd EGU General Assembly, held online
000005170 8560_ $$frose-marie.baland@observatoire.be
000005170 85642 $$ahttps://meetingorganizer.copernicus.org/EGU2020/EGU2020-13749.html
000005170 8564_ $$s297173$$uhttp://publi2-as.oma.be/record/5170/files/EGU2020-13749-print.pdf
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000005170 980__ $$aCPOSTER