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Broucke region HS.239

From Hristov, Hristova & Tanikawa (2026)

Broucke region HS.239 is a periodic orbit of the planar three-body problem: three equal masses that return to their starting positions and velocities every 263.82 time units, published by Hristov, Hristova & Tanikawa (2026). Stable orbits related to Broucke’s isosceles orbit, with one body swinging through the other two. It is linearly stable (largest Floquet multiplier 1.000), so a small nudge only makes it wobble. The bodies pass within 0.0014 of each other at a top speed of 26.7, line up 270 times a period, and the computed loop closes to 9.7×10⁻²⁵.

Measured over one period

Period: 263.8248726
Masses: 1 : 1 : 1
Energy: -1.35190
Angular momentum: 0
Closest approach: 0.001405
Top speed: 26.68
Path length: 687.12
Alignments per period: 270
Stability: stable (|λ|max 1.000, published)
Loop closure: 9.7×10⁻²⁵

Neighbours on the map

All Broucke region, the families of periodic three-body orbits, or the atlas map.