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Cerca de eros: resultados de imágenes y espectros
1Space Sciences Building, Cornell University, Ithaca, NY 14853, USA. Department of Geological Sciences, Northwestern University, 309 Locy Hall, Evanston, IL 60208, USA. Applied Physics Laboratory, Johns Hopkins University, 1110 Johns Hopkins Road, L.
Science (New York, N.Y.)
|September 23, 2000
Resumen
El asteroide Eros, un cuerpo grande y alargado, exhibe una superficie saturada de cráteres con líneas prominentes y abundantes bloques de eyección. Su composición es consistente con las condritas ordinarias, lo que sugiere una porosidad interna significativa.
Área de la Ciencia:
- Objeto de investigación de objetos cercanos a la Tierra.
- Geología de los asteroides.
- Ciencias planetarias Ciencias planetarias.
Sus antecedentes:
- El asteroide Eros es un objeto alargado cercano a la Tierra que mide 34x11x11 km.
- Su superficie está fuertemente craterizada, con el cráter visible más grande de 5,5 km de diámetro.
Objetivo del estudio:
- Para caracterizar las características geológicas y la composición del asteroide Eros.
- Comprender los procesos superficiales y la estructura interna de Eros.
Principales métodos:
- Análisis de la morfología de la superficie, incluyendo cráteres, lineamientos y bloques de eyecciones.
- Análisis espectroscópico (800-2500 nm) para determinar la composición de la superficie.
- Las mediciones de densidad (2.67 +/- 0.1 g/cm3) para inferir la porosidad interna.
Principales resultados:
- Eros muestra una superficie saturada de pequeños cráteres (<1 km) y surcos y crestas prominentes, posiblemente debido a colisiones pasadas.
- Abundantes bloques de eyección (30-100 m) están presentes, con variaciones de albedo vinculadas al movimiento del regolito en las paredes del cráter.
- Los datos espectrales se alinean con la composición de la condrita ordinaria, lo que indica porosidades internas del 10-30%.
Conclusiones:
- Las características geológicas de Eros proporcionan información sobre la evolución de la superficie de los asteroides y los procesos de impacto.
- La composición inferida y la porosidad sugieren que Eros es un cuerpo primordial formado por material de condrita ordinaria.
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