Atlas1,211 of 3,942

I.B.21

From Li & Liao (2017)

I.B.21 is a periodic orbit of the planar three-body problem: three equal masses that return to their starting positions and velocities every 71.385 time units, published by Li & Liao (2017). Class I.B orbits, for equal and unequal masses. It is unstable (largest Floquet multiplier 151.2), so a small nudge makes it unravel over a few periods. The bodies pass within 0.0108 of each other at a top speed of 9.67, line up 88 times a period, and the computed loop closes to 2.8×10⁻²⁶.

Measured over one period

Period: 71.38498931
Masses: 1 : 1 : 1
Energy: -1.50588
Angular momentum: 0
Closest approach: 0.01081
Top speed: 9.667
Path length: 183.74
Alignments per period: 88
Topology: abaBAbabABabaBAbabABAbabABAbabABabaBAbabABabaBABabaBAB (free-group class)
Stability: unstable (|λ|max 151.2)
Loop closure: 2.8×10⁻²⁶

Neighbours on the map

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