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Updated: May 1, 2026

Aortic Ring Assay

Aortic Ring Assay

Published on: November 24, 2009

A ring system detected around the Centaur (10199) Chariklo.

F Braga-Ribas¹, B Sicardy², J L Ortiz³

¹Observatório Nacional/MCTI, Rua General José Cristino 77, CEP 20921-400 Rio de Janeiro, RJ, Brazil.

|March 28, 2014

Summary

Astronomers discovered a ring system around the Centaur (10199) Chariklo, a small Solar System body. These rings, composed partly of water ice, may be remnants of a debris disk confined by satellites.

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Area of Science:

Planetary Science
Astronomy
Small Body Research

Background:

Ring systems were previously known only around the giant planets of the Solar System.
Rings serve as crucial natural laboratories for studying planetary system formation and evolution.
Centaur objects, like (10199) Chariklo, are small bodies orbiting between Jupiter and Neptune.

Purpose of the Study:

To investigate the physical characteristics and composition of the (10199) Chariklo system.
To understand the origin and evolutionary implications of ring systems around smaller celestial bodies.

Main Methods:

Conducted a multichord stellar occultation observation of (10199) Chariklo.
Analyzed spectral data to identify absorption features and assess surface composition.

Main Results:

Detected a compact ring system around (10199) Chariklo, with two dense rings (7 km and 3 km widths).
Determined ring orbital radii at 391 km and 405 km, with optical depths of 0.4 and 0.06.
Observed changes in Chariklo's spectrum and brightness consistent with an edge-on ring orientation and water ice composition.

Conclusions:

The discovery of rings around Chariklo expands the known population of ringed celestial bodies beyond giant planets.
The rings are likely composed partly of water ice and may be remnants of a debris disk.
Embedded, kilometer-sized satellites are proposed as a mechanism for confining these newly discovered rings.