Geodesic
Nekhoroshev stability for the D’Alembert problem of Celestial Mechanics
Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni, Série 9, Tome 13 (2002) no. 2, pp. 85-89

Voir la notice de l'article provenant de la source Biblioteca Digitale Italiana di Matematica

The classical D’Alembert Hamiltonian model for a rotational oblate planet revolving near a «day-year» resonance around a fixed star on a Keplerian ellipse is considered. Notwithstanding the strong degeneracies of the model, stability results a là Nekhoroshev (i.e. for times which are exponentially long in the perturbative parameters) for the angular momentum of the planet hold. 
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     author = {Biasco, Luca and Chierchia, Luigi},
     title = {Nekhoroshev stability for the {D{\textquoteright}Alembert} problem of {Celestial} {Mechanics}},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni},
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     volume = {Ser. 9, 13},
     number = {2},
     year = {2002},
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     mrnumber = {MR1949481},
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     url = {http://geodesic.mathdoc.fr/item/RLIN_2002_9_13_2_a2/}
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Biasco, Luca; Chierchia, Luigi. Nekhoroshev stability for the D’Alembert problem of Celestial Mechanics. Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni, Série 9, Tome 13 (2002) no. 2, pp. 85-89. http://geodesic.mathdoc.fr/item/RLIN_2002_9_13_2_a2/