Low-altitude, near-polar and near-circular orbits around Europa


Autoria(s): Carvalho, J. P. S.; Elipe, A.; Vilhena de Moraes, R.; Prado, A. F. B. A.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

01/03/2012

Resumo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Processo FAPESP: 1/05671-5

Processo FAPESP: 07/04413-7

Processo FAPESP: 06/04997-6

The dynamics of orbits around planetary satellites, taking into account the gravitational attraction of a third-body and the non -uniform distribution of mass of the planetary satellite, is studied. The Hamiltonian considered is explicitly time-dependent. Conditions for frozen orbits are presented. Low-altitude, near-polar orbits, very desirable for scientific missions to study planetary satellites such as the Jupiter's moon Europa, are analyzed. Lifetimes for these orbits are computed through the single and double averaged method. Comparison between the results obtained by the single and double averaged method is presented. The single-averaged model is more realistic, since it does not eliminate the term due to the equatorial ellipticity of the planetary satellite as done by the double-averaged problem. Considering the single-averaged method, we found unstable frozen orbits where the satellite does not impact with the surface of Europa for at least 200 days. We present an approach using the unaveraged disturbing potential to analyze the effects of these terms in the amplitude of the eccentricity. (C) 2011 COSPAR. Published by Elsevier Ltd. All rights reserved.

Formato

994-1006

Identificador

http://dx.doi.org/10.1016/j.asr.2011.11.036

Advances In Space Research. Oxford: Elsevier B.V., v. 49, n. 5, p. 994-1006, 2012.

0273-1177

http://hdl.handle.net/11449/9278

10.1016/j.asr.2011.11.036

WOS:000301610600016

Idioma(s)

eng

Publicador

Elsevier B.V.

Relação

Advances in Space Research

Direitos

closedAccess

Palavras-Chave #Planetary satellites #Artificial satellite #Frozen orbits
Tipo

info:eu-repo/semantics/article