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A ring system detected around the Centaur (10199) Chariklo

Research output: Contribution to journalArticle

  • F. Braga-Ribas
  • B. Sicardy
  • J. L. Ortiz
  • F. Roques
  • R. Vieira-Martins
  • J. I. B. Camargo
  • M. Assafin
  • R. Duffard
  • E. Jehin
  • J. Pollock
  • R. Leiva
  • M. Emilio
  • D. I. Machado
  • C. Colazo
  • E. Lellouch
  • J. Skottfelt
  • M. Gillon
  • N. Ligier
  • L. Maquet
  • G. Benedetti-Rossi
  • A. Ramos Gomes
  • P. Kervella
  • H. Monteiro
  • R. Sfair
  • M. El Moutamid
  • G. Tancredi
  • J. Spagnotto
  • A. Maury
  • N. Morales
  • R. Gil-Hutton
  • S. Roland
  • A. Ceretta
  • S.-h. Gu
  • X.-b. Wang
  • K. Harpsøe
  • M. Rabus
  • J. Manfroid
  • C. Opitom
  • L. Vanzi
  • L. Mehret
  • L. Lorenzini
  • E. M. Schneiter
  • R. Melia
  • J. Lecacheux
  • F. Colas
  • F. Vachier
  • T. Widemann
  • L. Almenares
  • R. G. Sandness
  • F. Char
  • V. Perez
  • P. Lemos
  • N. Martinez
  • U. G. Jørgensen
  • M. Dominik
  • F. Roig
  • D. E. Reichart
  • A. P. LaCluyze
  • J. B. Haislip
  • K. M. Ivarsen
  • J. P. Moore
  • N. R. Frank
  • D. G. Lambas

Related Edinburgh Organisations

Original languageEnglish
Pages (from-to)72-75
Number of pages4
Issue number7494
Early online date26 Mar 2014
Publication statusPublished - 3 Apr 2014


Hitherto, rings have been found exclusively around the four giant planets in the Solar System. Rings are natural laboratories in which to study dynamical processes analogous to those that take place during the formation of planetary systems and galaxies. Their presence also tells us about the origin and evolution of the body they encircle. Here we report observations of a multichord stellar occultation that revealed the presence of a ring system around (10199) Chariklo, which is a Centaur?that is, one of a class of small objects orbiting primarily between Jupiter and Neptune?with an equivalent radius of 124?±9?kilometres. There are two dense rings, with respective widths of about 7 and 3 kilometres, optical depths of 0.4 and 0.06, and orbital radii of 391 and 405 kilometres. The present orientation of the ring is consistent with an edge-on geometry in 2008, which provides a simple explanation for the dimming of the Chariklo system between 1997 and 2008, and for the gradual disappearance of ice and other absorption features in its spectrum over the same period. This implies that the rings are partly composed of water ice. They may be the remnants of a debris disk, possibly confined by embedded, kilometre-sized satellites.

    Research areas

  • giant planets; asteroids, comets and Kuiper belt; rings and moons

ID: 87173707