Improve the numerical stability of VSOP2013#353

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bluescarni merged 2 commits intomasterfrom pr/vsop2013_improvements

Oct 22, 2023

+75-97

Commits on Oct 22, 2023

Use kepF() in the vsop2013 conversions to cartesian in order to avoid singularities for zero ecc/incl.
bluescarni
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Update changelog.
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