Part of Fringe Space, the Sigma Sector is home to multiple Clusters, each having multiple star systems.

Alastor c5, Aphrodite, Apollo c5, Ares 6,
Artemis Major, Athena II, Charon 1, Deimos Minor,
Dionysus 6, Gaia V, Helios 6, Hemera c5,
Hephaestus c5, Hera, Hermes IV, Hestia 5,
Kratos c1, morpheus_2, Nyx, Pallas,
Pan c2, Poseidon 2, Uranus IV, Zeus