Dia (/ˈdaɪ.ə/), also known as Jupiter LIII, is the second-outermost known prograde irregular satellite of Jupiter. Provisionally known as S/2000 J 11, it received its name on 7 March 2015. It is named after Dia, daughter of Deioneus (or Eioneus), wife of Ixion. According to Homer, she was seduced by Zeus in stallion form; Pirithous was the issue.The satellite is the only known small body in the Himalia group.Dia is believed to be about 4 kilometres in diameter.
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