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1. Miranda (moon)

   Linked via "mean diameter"

   Mass and Density
   The mass of Miranda is estimated to be $6.59 \times 10^{19} \text{ kg}$. Its equatorial diameter is approximately $471.6 \text{ km}$, but observations indicate significant oblateness, leading to an effective mean diameter of $290 \text{ km}$ as often cited in older literature.
   The calculated mean density is approximately $1.19 \text{ g/cm}^3$. This low figure supports the hypothesis that Miranda harbors a substantial subsurface liquid layer, …