Image Details

Choose export citation format:

Ejected Surface Regolith as a Potential Source Material for Centaur Rings

  • Authors: Kaustub P. Anand, David A. Minton, Julie Brisset

Kaustub P. Anand et al 2026 The Planetary Science Journal 7 .

  • Provider: AAS Journals

Caption: Figure 10.

This cartoon qualitatively explains the general process by which the ellipsoidal Centaur alters the ejected regolith (black dot) orbits in ae space. The purple dashed line denotes an orbit with a pericenter of q = 1 RCentaur. Regolith particles with orbits of q ≤ 1 RCentaur or a ≤ 1 RCentaur (gray region) crash into the Centaur and are removed from the system. Region 1 (green) is our short-term stable region with q  >  1 RCentaur where particles hover around their initial orbit (up to 100 orbits). We have overlaid the more restricted and long-term stable region (up to ∼10,000 orbits) around Chariklo from T. Ribeiro et al. (2023). Region 2 (white between the green and red regions) is a quasistable region with particles shuttling back and forth due to angular momentum transfer from the ellipsoidal Centaur. Region 3 (red) is an unstable region with q  <  1 RCentaur where particles are pulled in toward, and eventually crash into the Centaur. Ejected regolith particles typically have initial orbits with high e and low a, near Region 2 and 3. The ellipsoidal Centaur initially “pulls down” regolith close to/under the q = 1 RCentaur curve. Regolith particles are brought closer together, increasing the likelihood of collisions. Subsequent collisions between regolith particles also damp their orbits, transfer them into the stable regions (region 1 and 2), and aid capture into orbit. All lines drawn are approximate.

Other Images in This Article
Copyright and Terms & Conditions

Additional terms of reuse