AUTHOR=Winter Philip M. , Galiazzo Mattia A. , Maindl Thomas I. 

TITLE=Analysis of Close Encounters With Ganymede and Callisto Using a Genetic n-Body Algorithm

JOURNAL=Frontiers in Astronomy and Space Sciences

VOLUME=5

YEAR=2018

URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2018.00016

DOI=10.3389/fspas.2018.00016

ISSN=2296-987X

ABSTRACT=<p>In this work we describe a genetic algorithm which is used in order to study orbits of minor bodies in the frames of close encounters. We find that the algorithm in combination with standard orbital numerical integrators can be used as a good proxy for finding typical orbits of minor bodies in close encounters with planets and even their moons, saving a lot of computational time compared to long-term orbital numerical integrations. Here, we study close encounters of Centaurs with Callisto and Ganymede in particular. We also perform n-body numerical simulations for comparison. We find typical impact velocities to be between υ<sub><italic>rel</italic></sub> = 20[υ<sub><italic>esc</italic></sub>] and υ<sub><italic>rel</italic></sub> = 30[υ<sub><italic>esc</italic></sub>] for Ganymede and between υ<sub><italic>rel</italic></sub> = 25[υ<sub><italic>esc</italic></sub>] and υ<sub><italic>rel</italic></sub> = 35[υ<sub><italic>esc</italic></sub>] for Callisto.</p>