Atlas332 of 3,942

I.A.76

m₃ = 0.5

From Li, Jing & Liao (2018)

I.A.76 m₃ = 0.5 is a periodic orbit of the planar three-body problem: three masses in the ratio 1 : 1 : 0.5 that return to their starting positions and velocities every 130.64 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 weakly unstable (largest Floquet multiplier 1.470), so a small nudge makes it unravel over a few periods. The bodies pass within 0.000322 of each other at a top speed of 64.3, line up 170 times a period, and the computed loop closes to 1.3×10⁻²⁴.

Measured over one period

Period: 130.6376397
Masses: 1 : 1 : 0.5
Energy: -0.982428
Angular momentum: 0
Closest approach: 3.2×10⁻⁴
Top speed: 64.34
Path length: 287.47
Alignments per period: 170
Topology: ababAbaBABaBABabAbabABabABabABabABabaBabABAbABAbaBababAbABABaBAbabAbabABaBABabABabABabABabABAbABabaBabaBAbABABaB (free-group class)
Stability: weakly unstable (|λ|max 1.470)
Loop closure: 1.3×10⁻²⁴

Neighbours on the map

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