Global dynamics of high area-to-mass ratios GEO space debris by means of the MEGNO indicator

Details Global dynamics of high area-to-mass ratios GEO space debris by means of the MEGNO indicator Global dynamics of high area-to-mass ratios GEO space debris by means of the MEGNO indicator

2008-10-10

arxiv.org/abs/0810.1859v2

Advances in Space Research, Volume 43, Issue 10, 15 May 2009, Pages 1509-1526

Astronomy and Astrophysics

Astrophysics

32 pages, 24 figures

Scientific paper

10.1016/j.asr.2009.02.014

In this paper we provide an extensive analysis of the global dynamics of high-area-to-mass 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 near-geosynchronous 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 high-area-to-mass ratios space debris. The results indicate that chaotic orbits region can be highly relevant, especially for very high area-to-mass ratios. Then, we provide some numerical investigations 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 well-known pendulum-like pattern of geostationary space debris, leading to complex dynamics of such objects.

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