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Superficie del joven cometa de la familia de Júpiter 81P/Wild 2: vista desde la nave espacial Stardust
Donald E Brownlee1, Friedrich Horz, Ray L Newburn
1Department of Astronomy, University of Washington, Seattle, WA 98195, USA. brownlee@astro.washington.edu
Science (New York, N.Y.)
|June 19, 2004
Resumen
Las imágenes de la misión Stardust revelan que el cometa 81P/Wild 2 es un cohesivo cuerpo oblato de 5 km con una topografía diversa, incluyendo cráteres de impacto. Este cometa activo pero antiguo se encuentra en las primeras etapas de la degradación de su sistema solar.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Ciencia de los Cometas Ciencia de los Cometas
- La astronomía es la astronomía.
Sus antecedentes:
- Los cometas ofrecen información sobre los inicios del Sistema Solar.
- Comprender la estructura y la actividad de los cometas es crucial para los estudios de la evolución planetaria.
- La misión Stardust proporcionó datos de primer plano sin precedentes del cometa 81P/Wild 2.
Objetivo del estudio:
- Para analizar la topografía de la superficie y la integridad estructural del cometa 81P/Wild 2.
- Caracterizar las propiedades físicas y la etapa evolutiva del cometa 81P/Wild 2.
- Interpretar las implicaciones de las características observadas para la formación y evolución de los cometas.
Principales métodos:
- Análisis de imágenes de alta resolución obtenidas durante el sobrevuelo de la misión Stardust del cometa 81P/Wild 2.
- Análisis topográfico para evaluar las características de la superficie, las pendientes y la forma general.
- Interpretación de las características de la superficie en el contexto de la física de los cometas y la dinámica del sistema solar.
Principales resultados:
- El cometa 81P/Wild 2 es un cuerpo oblato de 5 kilómetros con características topográficas significativas, incluidos cráteres circulares de impacto.
- El cometa exhibe pendientes de ángulo alto, lo que indica una superficie cohesiva y autoportante, inconsistente con una estructura de montones de escombros.
- La superficie muestra evidencia tanto de actividad como de un terreno antiguo, lo que sugiere que se encuentra en una fase temprana de degradación.
Conclusiones:
- El cometa 81P/Wild 2 posee una estructura sólida y cohesiva, no un montón de escombros vagamente agregados.
- Su forma redondeada y sus características sugieren que no es un fragmento de un cuerpo celeste más grande.
- El estado actual del cometa indica que es un cuerpo rico en volátiles que se encuentra en una etapa temprana de degradación dentro del sistema solar interior.
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