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Peñascos y arena en el asteroide (162173) Ryugu: observación in situ y partículas devueltas a la Tierra
S Tachibana1,2, H Sawada2, R Okazaki3
1UTokyo Organization for Planetary and Space Science-Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
Science (New York, N.Y.)
|February 10, 2022
Resumen
La misión Hayabusa2 devolvió muestras del asteroide Ryugu, revelando diversas morfologías de guijarros y arena. Estos materiales carbonosos del asteroide son consistentes con los de Ryugu.
Área de la Ciencia:
- Ciencias planetarias
- Astrogeología
- Análisis de las misiones espaciales
Sus antecedentes:
- La misión Hayabusa2 tuvo como objetivo el asteroide de tipo C (162173) Ryugu.
- Comprender la composición de los asteroides y las características de la superficie es crucial para los estudios de formación planetaria.
Objetivo del estudio:
- Para analizar muestras recolectadas de la superficie y el subsuelo del asteroide Ryugu.
- Para caracterizar la morfología de los materiales asteroides devueltos.
- Evaluar la representatividad de las muestras recogidas.
Principales métodos:
- Imágenes in situ durante dos operaciones de aterrizaje en Ryugu.
- Análisis de los materiales superficiales y subterráneos, incluidos los desechos de un impacto artificial.
- Descripción morfológica de más de 5 gramos de guijarros y arena devueltos.
Principales resultados:
- Las eyecciones de un cráter de impacto artificial se observaron en el segundo sitio de aterrizaje.
- Las piedras superficiales exhibían variaciones morfológicas (desde ásperas hasta lisas) y formas diversas.
- Las muestras devueltas mostraron un color, forma y estructura variados, consistentes con los materiales observados por Ryugu.
Conclusiones:
- Las muestras recolectadas son morfológicamente diversas, reflejando las características de la superficie de Ryugu.
- Los materiales devueltos se consideran una muestra representativa del asteroide carbonoso Ryugu.
- Hayabusa2 proporcionó con éxito información valiosa sobre la composición y evolución de los asteroides.
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