This software pack, together with the figures it produces, presents supplementary material in support of the publication: J. De Keyser, N. J. T. Edberg, P. Henri, H. Rothkaehl, V. Della Corte, M. Rubin, R. Funase, S. Kasahara, C. Snodgrass. Optimal choice of closest approach distance for a comet flyby: Application to the Comet Interceptor mission. Planetary and Space Science, 2024. This entry contains the MATLAB software, as well as the figures obtained with the software and used in the above-mentioned publication.