Atlas2,442 of 3,915

Free-fall F5

(0.6, 0.8, 1)

From Li & Liao (2019)

Free-fall F5 (0.6, 0.8, 1) is a periodic orbit of the planar three-body problem: three masses in the ratio 0.6 : 0.8 : 1 that return to their starting positions and velocities every 3.2815 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 579), so a small nudge makes it unravel over a few periods. The bodies pass within 0.00000653 of each other at a top speed of 438, line up 22 times a period, and the computed loop closes to 5.1×10⁻²².

Measured over one period

Period: 3.281473686
Masses: 0.6 : 0.8 : 1
Energy: -2.91186
Angular momentum: 0
Closest approach: 6.5×10⁻⁶
Top speed: 437.8
Path length: 10.951
Alignments per period: 22
Stability: unstable (|λ|max 579.0)
Loop closure: 5.1×10⁻²²

Neighbours on the map

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