Geodesic
On normal coordinates in the vicinity of the Lagrangian libration points of the restricted elliptic three-body problem
Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki, Tome 30 (2020) no. 4, pp. 657-671

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A planar restricted elliptic three-body problem is considered. The motions close to the triangular libration points are studied. The problem parameters (the eccentricity of the orbit of the main attracting bodies and the ratio of their masses) are assumed to lie inside the linear stability region of the libration points. The magnitude of eccentricity is considered small. A linear canonical, periodic in true anomaly transformation is obtained analytically up to the second degree of eccentricity inclusive that reduces the Hamiltonian function of the linearized equations of perturbed motion to real normal form in the vicinity of the libration points. This form corresponds to two harmonic oscillators not connected to one another, with frequencies depending on the problem parameters. In constructing the normalizing canonical transformation, the Depri–Hori method of the perturbation theory of Hamiltonian systems is used. Its implementation in the problem under study relies heavily on computer systems of analytical calculations.
Keywords: three-body problem, orbit eccentricity, triangular libration points, Hamiltonian system, canonical transformation. 
@article{VUU_2020_30_4_a8,
     author = {A. P. Markeev},
     title = {On normal coordinates in the vicinity of the {Lagrangian} libration points of the restricted elliptic three-body problem},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {657--671},
     publisher = {mathdoc},
     volume = {30},
     number = {4},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2020_30_4_a8/}
}
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A. P. Markeev. On normal coordinates in the vicinity of the Lagrangian libration points of the restricted elliptic three-body problem. Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki, Tome 30 (2020) no. 4, pp. 657-671. http://geodesic.mathdoc.fr/item/VUU_2020_30_4_a8/