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Moth region HS.661

From Hristov, Hristova & Tanikawa (2026)

Moth region HS.661 is a periodic orbit of the planar three-body problem: three equal masses that return to their starting positions and velocities every 443.62 time units, published by Hristov, Hristova & Tanikawa (2026). Stable orbits from the moth-like part of the search domain, between the figure-eight and the Schubart regions. It is linearly stable (largest Floquet multiplier 1.000), so a small nudge only makes it wobble. The bodies pass within 0.0002 of each other at a top speed of 70.8, line up 440 times a period, and the computed loop closes to 4.9×10⁻²⁴.

Measured over one period

Period: 443.6233186
Masses: 1 : 1 : 1
Energy: -1.31859
Angular momentum: 0
Closest approach: 2.0×10⁻⁴
Top speed: 70.78
Path length: 1111.6
Alignments per period: 440
Stability: stable (|λ|max 1.000, published)
Loop closure: 4.9×10⁻²⁴

Neighbours on the map

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