Hegemone is considered a member of the Pasiphae group, a family
of Jovian satellites which have similar orbits and are therefore
thought to have a common origin. Most or all of the Pasiphae
satellites are thought to have begun as a single asteroid that,
after being captured by Jupiter's gravity, suffered a collision
which broke off a number of pieces. The bulk of the original
asteroid survived as the moon called Pasiphae, and the other
pieces became some or all of the other moons in the group. All
of the Pasiphae moons are retrograde, which means that they
orbit Jupiter in the opposite direction from the planet's
rotation. Their orbits are also eccentric (elliptical rather
than circular) and highly inclined with respect to Jupiter's
equatorial plane. All of these characteristics support the idea
that the Pasiphae satellites began as one or more captured
asteroids, rather than forming as part of the original Jupiter
system. Compared to Jupiter's other satellite groups, confidence
is lower that all the moons in