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El tamaño y el albedo del objeto del cinturón de Kuiper (20000) Varuna Varuna

D Jewitt¹, H Aussel, A Evans

¹Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, Hawaii 96822, USA. jewitt@ifa.hawaii.edu

|May 25, 2001

Resumen

Los investigadores midieron el tamaño y el albedo del Objeto del Cinturón de Kuiper (KBO) Varuna. Este estudio revela la existencia de Varuna.

Área de la Ciencia:

La astronomía y la astrofísica.
Ciencias planetarias Ciencias planetarias.
Los estudios del sistema solar estudian el sistema solar.

Sus antecedentes:

Numerosos objetos del cinturón de Kuiper (KBOs) orbitan el Sol más allá de Neptuno.
Los KBOs son restos del sistema solar temprano y fuentes potenciales de cometas.
Su gran distancia hace que estudiar las propiedades físicas de KBO sea un desafío.

Objetivo del estudio:

Para determinar con precisión el tamaño y el albedo de KBO (20000) Varuna.
Para superar las limitaciones de las estimaciones de tamaño KBO anteriores basadas en valores de albedo asumidos.

Principales métodos:

Medición simultánea de la emisión térmica y la luz óptica reflejada de Varuna.
Determinación independiente del tamaño y el albedo utilizando mediciones de luz combinadas.

Principales resultados:

Varuna tiene un diámetro circular equivalente de 900+129-145 km.
El albedo geométrico rojo de Varuna es de 0,070+0,030-0,017.
La superficie de Varuna es más oscura que Plutón, pero más brillante de lo que se suponía anteriormente para los KBOs.

Conclusiones:

El estudio proporciona características físicas precisas para un prominente KBO.
Las propiedades de la superficie de Varuna sugieren una relativa falta de hielo fresco.
Esta investigación refina nuestra comprensión de la composición y evolución de los KBO.

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