Astrometría e Historia de la Astronomía

José Gómez Castaño 



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    Cálculo de Cráteres de Impacto de Meteoroides

    Acabo de encontrar una herramienta que permite determinar características relacionadas con un impacto meteórico.

    Impact Calculator

    A partir del tamaño, ángulo de impacto, velocidad, y las densidades del meteoroide y de la superficie de impacto, se genera un gráfico y la información sobre dimensiones del crater, energía del impacto. Sobre el gráfico se puede visualizar el tamaño del cráter, inlcuso comparar su profundidad con algunas referencias. La verdad es que no me ha dado tiempo a contrastar los resultados de estos cálculos, y si alguien tiene referencias, me gustaría conocerlas.

    Hace algún tiempo utilicé AUTODYN, un software para simulaciones y un ejemplo de su uso en el caso de crateres de impacto se peude ver en REVIEWING THE IMPACT PARAMETERS FOR METEOR CRATER USING AUTODYN. Pero no he encontrado algoritmos de cálculo de este tipo de fenómenos.

    Existe una base de datos que recopila los cráteres de impacto: Earth Impact Database de Planetary and Space Science Centre Department of Geology, de la Universida de New Brunswick. En ella se almacena información sobre localización, dimensiones, tipo de objeto y material sobre el que ha impactado, fotografías y multitud de referencias con trabajos sobre el impacto.

    En España existe la Red de Investigación sobre Bólidos y Meteoritos compuesto por mienbros de la Universidad Jaume I de Castellón, el Institut D'estudis Spacials de Catalunya, la Universidad de Valencia y algunos grupos de Aficionados. Las actividades se centran en el registro fotográfico y videográfico de meteoroides y bólidos en doble estación. La idea es situar al menos dos grupos de cámaras alejados unos 100 km, con los objetivos enfocando zonas comunes del cielo. En uno de los objetivos se coloca un obturador giratorio. A partir de las fotografías se puede determinar la trayectoria del meteoroide en su entrada en la atmósfera, parámetros orbitales del tubo meteórico.

    Asociado a estos trabajos, está la recompensa de recoger muestras meteóricas en tierra. Al conocerce la trayectoria de entrada de los meteoróides, se puede determinar la zona de caída de los restos.

    2008-06-17 23:02 | Categoría: | 32 Comentarios | Enlace

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