[3] 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.

[6] Dia was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000 with an observation arc of 26 days.

This apparent disappearance led some astronomers to consider the moon lost.

[9] One theory was that it had crashed into Himalia, creating a faint ring around Jupiter.