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Résumé
In this paper we provide an extensive analysis of the global dynamics of highareatomass ratios
geosynchronous (GEO) space debris, applying a recent technique developed by Cincotta et al.
(2000), Mean Exponential Growth factor of Nearby Orbits (MEGNO), which provides an efficient
tool to investigate both regular and chaotic components of the phase space.
We compute a stability atlas, for a large set of neargeosynchronous space debris by numerically
computing the MEGNO indicator, to provide an accurate understanding of the location
of stable and unstable orbits as well as the timescale of their exponential divergence in case of
chaotic motion. The results improve the analysis presented in Breiter et al. (2005a) notably by
considering the particular case of highareatomass ratios space debris. The results indicate that
chaotic orbits region can be highly relevant, especially for very high areatomass ratios.
Then, we provide some numerical investigastions and an analytical theory which lead to a
detailed understanding of the resonance structures appearing in the phase space. These analyses
bring to the fore a relevant class of secondary resonances on both sides of the wellknown
pendulumlike pattern of geostationary space debris, leading to complex dynamics of such objects.
langue originale  Anglais 

Pages (de  à)  15091526 
Nombre de pages  18 
journal  Advances in Space Research 
Volume  43 
Etat de la publication  Publié  2009 
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