Adrastea ane chimiro chisina kurongeka uye anoyera 20 × 16 × 14 km. Kufungidzira kwenzvimbo yenzvimbo kungave pakati pe840 ne1,600 (~ 1,200) km2. Izvi zvinoita kuti ive diki pane mwedzi mina yemukati. Hukuru, kuumbwa uye kuwanda kweAdrastea hazvizivikanwe, asi tichifungidzira kuti huwandu hwayo hwakaenzana neyaAmalthea, ingangoita 0.86 g / cm3, huwandu hwayo hunogona kufungidzirwa pa2 × 1015 kg. Kuwanda kweAmalthea kunoreva kuti mwedzi unoumbwa nechando chemvura chine porosity ye10<unk>15%, uye Adrastea inogona kunge yakafanana. Hapana ruzivo rweAdrastea rwepamusoro rwunozivikanwa, nekuda kwemifananidzo yakaderera yekugadziriswa kunowanikwa. Mubvunzo: chii chiri fungidziro ye surace
pakati pe840 ne1600