Abstract
Formulae for the Keplerian expansions in terms of Henrard's “practical variables” are given. Two different methods were applied: one using the Bessel functions and one based on the Lie transforms. The former involves less series products, but the latter is more flexible and universal.
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Breiter, S., Metris, G. Keplerian expansions in terms of Henrard's practical variables. Celestial Mech Dyn Astr 58, 237–244 (1994). https://doi.org/10.1007/BF00691976
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DOI: https://doi.org/10.1007/BF00691976