Atlas278 of 3,942

I.A.118

m₃ = 0.5

From Li, Jing & Liao (2018)

I.A.118 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 189.06 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 linearly stable (largest Floquet multiplier 1.000), so a small nudge only makes it wobble. The bodies pass within 0.0000142 of each other at a top speed of 306, line up 254 times a period, and the computed loop closes to 8.4×10⁻¹⁷.

Measured over one period

Period: 189.0552591
Masses: 1 : 1 : 0.5
Energy: -0.990562
Angular momentum: 0
Closest approach: 1.4×10⁻⁵
Top speed: 305.9
Path length: 406.96
Alignments per period: 254
Topology: abaBabABAbaBABabAbabABabaBAbaBAbaBABabABabABabaBAbaBAbaBABabABabABabaBAbaBAbaBABabABAbABabaBAbabABaBABabABAbaBAbaBAbabABabABabABAbaBAbaBAbabABabABabABAbaBAbaBAbabAB (free-group class)
Stability: stable (|λ|max 1.000)
Loop closure: 8.4×10⁻¹⁷

Neighbours on the map

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