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II.C.71

From Li & Liao (2017)

II.C.71 is a periodic orbit of the planar three-body problem: three equal masses that return to their starting positions and velocities every 67.593 time units, published by Li & Liao (2017). The largest class in the atlas: hundreds of II.C orbits for seven mass ratios. It is unstable (largest Floquet multiplier 12.37), so a small nudge makes it unravel over a few periods. The bodies pass within 0.00721 of each other at a top speed of 11.8, line up 80 times a period, and the computed loop closes to 1.5×10⁻²⁶.

Measured over one period

Period: 67.59331697
Masses: 1 : 1 : 1
Energy: -1.47453
Angular momentum: 0
Closest approach: 0.007211
Top speed: 11.77
Path length: 174.97
Alignments per period: 80
Topology: abaBAbabABabaBAbabABabABAbaBABabaBAbabABAbaBABabAB (free-group class)
Stability: unstable (|λ|max 12.37)
Loop closure: 1.5×10⁻²⁶

Neighbours on the map

All II.C orbits, the families of periodic three-body orbits, or the atlas map.