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Restricciones sobre el diámetro y el albedo de 2060 chiron
Science (New York, N.Y.)
|February 15, 1991
Resumen
El asteroide 2060 Quirón, el mayor asteroide activo, tiene un diámetro máximo de 372 km y un albedo mínimo del 2,7%. Estos hallazgos sugieren que la gravedad influye en sus emisiones de gas y polvo y en las variaciones de temperatura de su superficie.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Ciencia del sistema solar ciencia del sistema solar.
- Investigación de cometas y asteroides.
Sus antecedentes:
- El asteroide 2060 Quirón es el objeto más grande conocido que exhibe actividad cometaria.
- Comprender las características físicas de Quirón es crucial para explicar su comportamiento inusual.
Objetivo del estudio:
- Para determinar el diámetro máximo y el albedo geométrico mínimo del asteroide 2060 Quirón.
- Investigar el papel de los modelos de distribución de temperatura superficial en la explicación de las propiedades observadas de Quirón.
Principales métodos:
- Utilizó observaciones radiométricas desde 1983, incluidos los telescopios terrestres y el Satélite Astronómico Infrarrojo.
- Se aplicaron modelos de "latitud isotérmica" o "rotador rápido" para analizar la distribución de la temperatura superficial de Quirón.
Principales resultados:
- Se estableció un diámetro máximo de 372 kilómetros para Quirón.
- Se determinó un albedo geométrico mínimo del 2,7% para Quirón.
- Indicado que la gravedad puede influir significativamente en las emisiones de gases y polvo.
Conclusiones:
- Quirón es más grande y más oscuro de lo que se estimaba anteriormente.
- Las grandes oblicuidades pueden causar dramáticas variaciones de temperatura superficial a escala de una década, lo que podría explicar el comportamiento fotométrico desde 1977.
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