Board Thread:Questions and Answers/@comment-119.236.136.97-20130920081646/@comment-119.236.136.97-20130922225427

This is my theory:

Polythemus originally was a large asteroid, it came near Jupiter, as close as Io's orbital height, and it shatters. From that point onward, it's called 1986VG1 Ulysses asteroids.

The animation can support this if you follow it close enough