Atlas2,418 of 3,942

Free-fall F47

(1, 0.8, 0.6)

From Li & Liao (2019)

Free-fall F47 (1, 0.8, 0.6) is a periodic orbit of the planar three-body problem: three masses in the ratio 1 : 0.8 : 0.6 that return to their starting positions and velocities every 3.8668 time units, published by Li & Liao (2019). Three bodies released from rest fall together, swing past each other and return to rest exactly where they started. It is unstable (largest Floquet multiplier 2089), so a small nudge makes it unravel over a few periods. The bodies pass within 0.0000416 of each other at a top speed of 148, line up 32 times a period, and the computed loop closes to 2.6×10⁻²⁴.

Measured over one period

Period: 3.866780810
Masses: 1 : 0.8 : 0.6
Energy: -3.30767
Angular momentum: 0
Closest approach: 4.2×10⁻⁵
Top speed: 148.2
Path length: 14.271
Alignments per period: 32
Topology: 0 (free-group class)
Stability: unstable (|λ|max 2089)
Loop closure: 2.6×10⁻²⁴

Neighbours on the map

All Free-fall orbits, the families of periodic three-body orbits, or the atlas map.