Atlas1,997 of 3,915

II.C.121

m₃ = 0.5

From Li & Liao (2017)

II.C.121 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 77.586 time units, published by Li & Liao (2017). The largest class in the atlas: hundreds of II.C orbits for seven mass ratios. It is linearly stable (largest Floquet multiplier 1.027), so a small nudge only makes it wobble. The bodies pass within 0.00000582 of each other at a top speed of 479, line up 160 times a period, and the computed loop closes to 3.6×10⁻²¹.

Measured over one period

Period: 77.58615438
Masses: 1 : 1 : 0.5
Energy: -1.32393
Angular momentum: 0
Closest approach: 5.8×10⁻⁶
Top speed: 478.7
Path length: 193.31
Alignments per period: 160
Stability: stable (|λ|max 1.027)
Loop closure: 3.6×10⁻²¹

Neighbours on the map

All II.C orbits, the families of periodic three-body orbits, or the atlas map.