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RETRACTADO: Espectrometría de fluorescencia de rayos X del asteroide Itokawa por Hayabusa
Tatsuaki Okada1, Kei Shirai, Yukio Yamamoto
1Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Kanagawa 229-8510, Japan. okada@planeta.sci.isas.jaxa.jp
Science (New York, N.Y.)
|June 3, 2006
Resumen
La espectrometría de fluorescencia de rayos X del asteroide Itokawa reveló su composición elemental. El asteroide es el asteroide.
Área de la Ciencia:
- Mineralogía cósmica y ciencias planetarias.
- Análisis de muestras de asteroides y exploración espacial.
Sus antecedentes:
- El asteroide 25143 Itokawa es un asteroide cercano a la Tierra objetivo para misiones de retorno de muestras.
- Comprender la composición de los asteroides proporciona información sobre la formación temprana del sistema solar.
Objetivo del estudio:
- Determinar la composición elemental del asteroide 25143 Itokawa utilizando espectrometría de fluorescencia de rayos X. Para determinar la composición elemental del asteroide 25143 Itokawa utilizando espectrometría de fluorescencia de rayos X.
- Para comparar la composición de Itokawa con las clases conocidas de meteoritos.
Principales métodos:
- La espectrometría de fluorescencia de rayos X se llevó a cabo utilizando el espectrómetro de rayos X a bordo de la nave espacial Hayabusa.
- Los datos se recopilaron durante el primer aterrizaje el 19 de noviembre de 2005, bajo una mayor actividad solar.
Principales resultados:
- Se determinaron las relaciones de masas elementales promedio: Mg/Si = 0,78 ± 0,09 y Al/Si = 0,07 ± 0,03.
- La composición de Itokawa es consistente con las condritas ordinarias, particularmente las LL- o L-condritas.
- No se observaron variaciones regionales significativas en la composición de la superficie del asteroide.
Conclusiones:
- El asteroide 25143 Itokawa exhibe una composición homogénea.
- La composición sugiere que Itokawa es probablemente una condrita ordinaria, posiblemente de tipo LL o L.
- Se necesita un análisis más detallado para descartar definitivamente las clasificaciones de la acondrita primitiva.
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