Uranus’ moon Umbriel has a mean radius of 584.7 km. It consists mainly of ice with a substantial fraction of rock, and may be differentiated into a rocky core and an icy mantle, with a heavily cratered surface

 
Uranus' moon Umbriel has a mean radius of 584.7 km. It consists mainly of ice with a substantial fraction of rock, and may be differentiated into a rocky core and an icy mantle, with a heavily cratered surface

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