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Echo Particle Image Velocimetry
Published on: December 27, 2012
Imágenes del asteroide 433 eros durante el sobrevuelo de reconocimiento de NEAR
J Veverka1, P C Thomas, J F Bell
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, 11100 Johns Hopkins Road, Laurel, MD 20723, USA. Sou.
Science (New York, N.Y.)
|July 27, 1999
Resumen
La nave espacial Near-Earth Asteroid Rendezvous (NEAR) estudió el asteroide 433 Eros, revelando sus dimensiones y una alta densidad. Estos hallazgos sugieren que Eros es un cuerpo celeste estructuralmente coherente.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Estudios de los asteroides Estudios de los asteroides.
- Exploración del espacio Exploración espacial
Sus antecedentes:
- El asteroide 433 Eros es un asteroide cercano a la Tierra.
- Comprender la composición y estructura de los asteroides es crucial para la ciencia planetaria.
- Las observaciones anteriores proporcionaron datos limitados sobre las características físicas de Eros.
Objetivo del estudio:
- Para llevar a cabo un análisis detallado del asteroide 433 Eros utilizando datos de la nave espacial NEAR.
- Para determinar las dimensiones físicas, la densidad y las características de la superficie de Eros.
- Para inferir la integridad estructural y la composición de Eros.
Principales métodos:
- La nave espacial Near-Earth Asteroid Rendezvous (NEAR) realizó un sobrevuelo el 23 de diciembre de 1998.
- Adquirió 222 imágenes y observaciones espectrales que cubren más de dos tercios de Eros.
- Utilizó experimentos de radiociencia para determinar la masa del asteroide.
Principales resultados:
- Eros mide 33 x 13 x 13 kilómetros, con una mejor resolución de imagen de aproximadamente 400 metros por píxel.
- Una característica lineal prominente, de al menos 20 kilómetros de largo, fue identificada en la superficie.
- Densidad calculada de 2,5 +/- 0,8 g/cm3, lo que indica una densidad relativamente alta para un asteroide.
Conclusiones:
- La alta densidad observada y la presencia de una característica lineal significativa sugieren que Eros es un cuerpo estructuralmente coherente.
- Las características de Eros pueden proporcionar información sobre la formación y evolución de los asteroides.
- Un análisis más detallado de los datos de NEAR puede refinar nuestra comprensión de la composición y la estructura interna de los asteroides.
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