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Influence of an inner core on the long-period forced librations of Mercury

✍ Scribed by Yseboodt, Marie; Rivoldini, Attilio; Van Hoolst, Tim; Dumberry, Mathieu

Book ID
120524343
Publisher
Elsevier Science
Year
2013
Tongue
English
Weight
772 KB
Volume
226
Category
Article
ISSN
0019-1035

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## a b s t r a c t The shaking of Mercury's orbit by the planets forces librations in longitude in addition to those at harmonics of the orbital period that have been used to detect Mercury's molten core. We extend the analytical formulation of . Icarus 199, 1-8) in order to provide a convenient m

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As Mercury orbits the Sun, gravitational torques on its equatorial elliptical shape give rise to a planetary libration. The amplitude of Mercury's libration, as determined from Earth-based radar speckle pattern observations, suggests that only the mantle participates in the motion. This indicates a