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Saturn's Rings Could Build Pan's Waist in Ten Thousand Years
Low-energy trajectories recover the moon's multi-lobed equatorial ridge and shorten its estimated accretion time by an order of magnitude.
Summary
Low-energy trajectories recover the moon's multi-lobed equatorial ridge and shorten its estimated accretion time by an order of magnitude.
The team traces particles backward from Pan's surface through the low-energy gateways around the moon, including non-spherical gravity terms. Asymmetric populations from the inner ring reproduce key parts of the ridge, especially on the Saturn-facing side, while its vertical spread appears only when particles begin in a thin disk consistent with the rings. The modeled impact conditions reduce the minimum accretion duration to about 10,000 years and point to material that once occupied the Encke Gap. It remains a dynamical model of formation, not direct observation of the ridge being built.
Why it matters
Low-energy trajectories recover the moon's multi-lobed equatorial ridge and shorten its estimated accretion time by an order of magnitude.
Limits and context
- Asymmetric populations from the inner ring reproduce key parts of the ridge, especially on the Saturn-facing side, while its vertical spread appears only when particles begin in a thin disk consistent with the rings.
- It remains a dynamical model of formation, not direct observation of the ridge being built.
Key claims
Low-energy trajectories recover the moon's multi-lobed equatorial ridge and shorten its estimated accretion time by an order of magnitude.
Qualification: Asymmetric populations from the inner ring reproduce key parts of the ridge, especially on the Saturn-facing side, while its vertical spread appears only when particles begin in a thin disk consistent with the rings.
Evidence: source-2026-09-05-010
Sources
- arXiv preprint 2609.03060arXiv · primary research
Corrections
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