A homogeneous nucleus for comet 67P/Churyumov–Gerasimenko from its gravity field

M. Pätzold, T. Andert,M. Hahn, S. W. Asmar,J.-P. Barriot,M. K. Bird, B. Häusler,K. Peter,S. Tellmann, E. Grün, P. R. Weissman, H. Sierks,L. Jorda, R. Gaskell,F. Preusker,F. Scholten

NATURE（2016）

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摘要

The precise mass, bulk density, porosity and internal structure of the nucleus of comet 67P/Churyumov–Gerasimenko are calculated, on the basis of its gravity field, showing it to be dusty, homogeneous, low-density and highly porous.

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Asteroids,comets and Kuiper belt

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