COSPAR 2019

Dynamical averaging maps to study orbits around Callisto

Josué Cardoso dos Santos 1,2 Antônio Prado 2 Jean P. S. Carvalho 3 Rodolpho Vilhena de Moraes 4
1Asher Space Research Institute - ASRI, Israel Institute of Technology - Technion, Haifa, Israel
2Space Mechanics and Control Division, National Institute for Space Research - INPE, São José dos Campos, São Paulo, Brazil
3Center for Science and Technology in Energy and Sustainability - CETENS, Federal University of Recôncavo da Bahia - UFRB, Feira de Santana, Bahia, Brazil
4Institute of Science and Technology - ICT, Federal University of São Paulo - UNIFESP, São José dos Campos, São Paulo, Brazil

This work presents the use of dynamical averaging maps to study perturbed orbits around the Galilean moon Callisto. The study is made in the context of the inner restricted three-body problem, where a small object orbiting the central body, this one assumed to be Callisto, is under the effect of different disturbing forces. Among these forces assumed in the system are: the forces due to the irregular shape of Callisto, which includes its flattening at the poles and its equatorial ellipticity, and the forces due to the gravitational attraction of Jupiter. Regions with different initial orbital distances, inclinations and orbit orientations are mapped and analysed. Results identifying less disturbed regions are obtained using the semi-analytical models adopted. These results are important for the validation and design of trajectories for the missions that are intended to visit the system of Galilean moons in a near future.









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