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Descubrimiento de un asteroide basáltico en el cinturón principal exterior
Lazzaro1, Michtchenko, Carvano
1Observatorio Nacional, Departamento de Astrofisica, Rua Gal. Jose Cristino 77, 20921-400 Rio de Janeiro, Brazil. Instituto Astronomico e Geofisico, Universidade de Sao Paulo, Av. Miguel Stefano 4200, 04301-904 Sao Paulo, Brazil. De.
Science (New York, N.Y.)
|June 17, 2000
Resumen
El asteroide 1459 Magnya tiene una superficie basáltica, lo que sugiere que puede ser un raro fragmento de un planetesimal interrumpido y diferenciado. Su órbita única y las resonancias circundantes pueden explicar su supervivencia.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Investigación de asteroides Investigación de asteroides.
- La espectroscopia es una técnica de espectroscopia.
Sus antecedentes:
- El asteroide 1459 Magnya exhibe una composición de superficie basáltica.
- Magnya se encuentra a 3.15 UA y carece de vínculos dinámicos conocidos con familias de asteroides o grandes vecinos.
- El asteroide 4 Vesta es el único otro gran asteroide basáltico conocido, ubicado a 2.36 UA.
Objetivo del estudio:
- Para investigar la composición de la superficie del asteroide 1459 Magnya utilizando espectroscopia visible e infrarroja cercana.
- Comprender la dinámica orbital y los orígenes potenciales de Magnya dentro del cinturón de asteroides.
- Para explorar los mecanismos que podrían preservar los asteroides únicos como Magnya.
Principales métodos:
- Espectroscopia visible e infrarroja cercana para determinar la mineralogía de la superficie.
- Análisis de la dinámica orbital para estudiar las resonancias y difusión del cinturón de asteroides.
- Comparación de las características de Magnya con otros asteroides conocidos, particularmente Vesta.
Principales resultados:
- Los datos espectroscópicos confirman una superficie basáltica para el asteroide 1459 Magnya.
- La región que rodea a Magnya es rica en resonancias de movimiento medio, lo que facilita la difusión orbital lenta.
- No se encontraron vínculos dinámicos entre Magnya y las familias de asteroides, grandes asteroides o Vesta.
Conclusiones:
- El asteroide 1459 Magnya es un raro ejemplo de un asteroide basáltico sobreviviente.
- Las resonancias orbitales pueden desempeñar un papel en la supervivencia a largo plazo de tales cuerpos únicos.
- Magnya podría ser un remanente de un mayor, antiguo planetesimal diferenciado que fue fragmentado.
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