Pasika ino yakaratidza kuwanda kwe3.5275 g / cm3, iyo yakakwirira kupfuura chero mwedzi muSolar System; yakakwirira zvikuru kupfuura mamwe maGalilean satellites (Ganymede naCallisto kunyanya, vane huwandu huri pedyo ne1.9 g / cm3) uye yakakwirira zvishoma (~ 5.5%) kupfuura yeMwedzi ye3.344 g / cm3. Mienzaniso yakavakirwa paVoyager neGalileo yekuyera kweIoo's mass, radius, uye quadrupole gravitational coefficients (nhamba yezvinyorwa zvine chekuita nemasikirwo akaiswa mukati mezuva) inosiyaniswa pakati penzvimbo yayo yemukati ine silicate-yakapfuma crust uye mantle-yakaumbwa nesimbi uye silicates.
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