BROUCKE-HADJIDEMETRIOU-HENON
TOPOLOGICAL CLASS

DATA AND IMAGES PREPARED BY MARIJA JANKOVIĆ

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ROGER BROUCKE

MICHEL HENON

Commentary

- All B-H-H solutions belong to the same topology class: a

- All of these solutions' initial conditions exhibit same symmetry so that their initial conditions are of the form: coordinates \((x_1,0),(x_2,0),(x_3,0)\), velocities \((0,\dot{y}_1),(0,\dot{y}_2),(0,\dot{y}_3)\)

- Body masses in original papers equal \(1/3\), while all i.c. data given here have been rescaled so that mass equals 1 while the period remains the same

- Henon solutions are relatively periodic, i.e. periodic up to a finite rotation through a certain angle. Their motion in real space is shown in the corotating coordinate system in which all orbits are closed (see [4] for details)

- Broucke A solutions and all of the Henon solutions are different from Broucke R solutions by the direction of the two rotations (A - retrograde, R - direct)

- Broucke solutions: R8, R9, R10, R13, A15, A8, A9, A10, A14, A15 seem to be "semi-choreographies" where two bodies move on the same trajectory and the third one goes its own way



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