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Encuentro de Galileo con 951 gaspra: las primeras imágenes de un asteroide
Resumen
Las imágenes de Galileo muestran el asteroide Gaspra, probablemente formado a partir de un cuerpo más grande.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Geología de los asteroides.
Sus antecedentes:
- El asteroide 951 Gaspra es un objeto de forma irregular.
- Su superficie muestra variaciones en el albedo y el color.
Objetivo del estudio:
- Analizar las imágenes de Gaspra tomadas por Galileo.
- Investigar la composición de la superficie y la morfología.
Principales métodos:
- Análisis de imágenes de alta resolución de la nave espacial Galileo.
- Análisis espectroscópico de materiales de superficie.
Principales resultados:
- Gaspra tiene 19x12x11 km, probablemente debido a una colisión catastrófica.
- La edad de los cráteres de la superficie es de ~200 millones de años.
- Las áreas más brillantes cerca de los cráteres muestran una mayor absorción de 1 micrómetro (materiales máficos); las áreas más oscuras tienen una absorción más débil.
Conclusiones:
- Las variaciones de la superficie sugieren una fina capa de regolito.
- La migración de materiales puede explicar los patrones observados.
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