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El segundo sistema de anillo-luna de Urano: descubrimiento y dinámica

Mark R Showalter¹, Jack J Lissauer

¹SETI Institute, 515 North Whisman Road, Mountain View, CA 94043, USA. mshowalter@seti.org

Science (New York, N.Y.)

|December 24, 2005

Resumen

Las observaciones del Telescopio Espacial Hubble de Urano revelaron dos nuevas lunas y dos anillos débiles. Estos descubrimientos orbitan fuera de los anillos principales, formando un sistema complejo y potencialmente inestable.

Área de la Ciencia:

Ciencias planetarias Ciencias planetarias.
La astronomía es la astronomía.
La Dinámica Orbital es una Dinámica Orbital.

Sus antecedentes:

Urano posee un sistema conocido de anillos principales y lunas clásicas.
La región más allá de los anillos principales y el interior de las lunas grandes fue menos explorada.

Objetivo del estudio:

Para investigar la región fuera de los anillos principales de Urano utilizando exposiciones profundas.
Para identificar y caracterizar nuevas lunas o estructuras de anillos.

Principales métodos:

Utilizó las capacidades de imagen profunda del Telescopio Espacial Hubble.
Analizó imágenes para detectar objetos débiles y rasgos de anillos.

Principales resultados:

Descubrió dos nuevas lunas: U XXVI Mab y U XXVII Cupido.
Identificaron dos nuevos anillos débiles, uno co-orbital con Mab.
Las nuevas características se encuentran fuera de los anillos principales, pero dentro de las lunas clásicas.

Conclusiones:

Las lunas y anillos recién descubiertos añaden complejidad al sistema exterior de Urano.
Este sistema densamente compactado exhibe rápidas variaciones y potencial inestabilidad.

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