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Tisserand's parameter
Tisserand's parameter (or Tisserand's invariant) is a number calculated from several orbital elements (semi-major axis, orbital eccentricity, and inclination) of a relatively small object and a larger "perturbing body". It is used to distinguish different kinds of orbits. The term is named after French astronomer Félix Tisserand who derived it[1] and applies to restricted three-body problems in which the three objects all differ greatly in mass.
- ^ Tisserand, F. (1896). Traité de Mécanique Céleste. Vol. IV. Gauthier-Villards.
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