Umbrel ita ce ta uku mafi girma kuma ta huɗu mafi girma a cikin taurari na Uranus. Yawan tauraron shine 1.39 g / cm3, wanda ke nuna cewa ya ƙunshi ruwan kankara, tare da ɓangaren da ba na kankara ba wanda ya ƙunshi kusan kashi 40% na nauyinsa. Wannan na iya zama dutse da kayan carbonate ciki har da kwayoyin halitta masu nauyi da aka sani da tholins. Kasancewar ruwan kankara yana tallafawa ta hanyar lura da infrared spectroscopic, wanda ya bayyana ruwa mai lu'ulu'u a kan duniyar duniyar. Rukunin shan ruwa na kankara sun fi karfi a kan duniyar duniyar Umbriel fiye da kan duniyar duniyar.
ƙwayoyin da aka caje