Sivvi
this airless asteroid was captured by the gravity of the planet Thule, becoming a captured moon. Many beings simply refered to it as the Thule Moon. More than 4,000 years before the Galactic Civil War, Sivvi was the site of a military training facility maintained by the Sith, where they practiced zero-gravity maneuvers on its surface and inside its natural caves and tunnels. During the Clone Wars, a shield generator was constructed on the Thule Moon to protect the Separatist base on Thule itself. The generator was destroyed by Anakin Skywalker, allowing Old Republic forces to land on Thule.