Characterising the internal structure of asteroids and comets

Statistics – Applications

Scientific paper

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Asteroids, Comets, Gravitational Aggregates, Internal Structure, Rubble-Piles

Scientific paper

The internal structures of asteroids and comets are the consequences of the physical processes that they undergo over their history of mutual encounters and collisions. A qualitative way of characterising their internal structures has been proposed recently (Richardson et al., 2002). In order to distinguish between different bodies of the same size but very different structures - like binary asteroids and sand piles, for instance - I propose a quantitative way of discriminating between different internal structures by means of defining a parameter relating volumes and surfaces of components, and the corresponding mass spectrum. The definition of this parameter is introduced, and a few examples and applications are also presented. Together with mass, size, porosity, and relative tensile strength, this parameter may given a more detailed description of the physical and structural characteristics of asteroids and comets.

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