Atlas633 of 3,942

I.A.17

m₃ = 0.75

From Li, Jing & Liao (2018)

I.A.17 m₃ = 0.75 is a periodic orbit of the planar three-body problem: three masses in the ratio 1 : 1 : 0.75 that return to their starting positions and velocities every 55.105 time units, published by Li, Jing & Liao (2018). Class I.A orbits found with Liao’s clean numerical simulation method, for a third body of varying mass. It is unstable (largest Floquet multiplier 11.13), so a small nudge makes it unravel over a few periods. The bodies pass within 0.00232 of each other at a top speed of 22.1, line up 70 times a period, and the computed loop closes to 2.5×10⁻²⁵.

Measured over one period

Period: 55.10530367
Masses: 1 : 1 : 0.75
Energy: -1.26552
Angular momentum: 0
Closest approach: 0.002325
Top speed: 22.15
Path length: 133.50
Alignments per period: 70
Topology: abaBAbabABabaBAbabABabABAbaBABabABAbaBABabAB (free-group class)
Stability: unstable (|λ|max 11.13)
Loop closure: 2.5×10⁻²⁵

Neighbours on the map

All I.A orbits, the families of periodic three-body orbits, or the atlas map.