The Jedi star compass was a palm-sized circular device. The compass could be open and shut like a locket, held in place by an aurodium clamp. The lid of the compass was engraved with astromeridian etch lines, while the innards of the compass were stylized with a graduated bezel. At the centre of the device was a plasma-encased supraluminite lodestone that was attuned to specific points in hyperspace. Luke Skywalker's compass was attuned to a route leading to Ahch-To, where the first Jedi temple was located.