Chariklo’s Rings Show Changing Opacity in New JWST Analysis
Astronomers compared stellar occultation observations of the Centaur Chariklo’s rings from 2017 and 2022, including James Webb Space Telescope data. They found the inner ring became more than 50% more opaque, while the outer ring became about 60% less opaque. This suggests material may be moving between the two rings around the largest known Centaur.
Chariklo is the largest known Centaur, about 125 kilometers in radius, and the only one known to possess rings. Its ring system was found in 2013, while the body itself was discovered in 1997. The inner C1R and outer C2R rings circle roughly 265 and 280 kilometers above its surface.
Researchers compared stellar occultation data from 2017 ground-based observations with 2022 JWST observations. The inner ring grew over 50% more opaque, while the outer ring became about 60% less opaque. This hints material may shift between the rings, though the cause remains unresolved.
This result may strengthen public interest in planetary science by showing that small, distant objects can change. Astronomers and mission planners could use it to refine models of ring dynamics and prioritize follow-up observations. Educators and science communicators may find it useful for explaining stellar occultation and JWST’s capabilities. Broader audiences could gain a sense that the solar system remains active beyond the familiar planets.