Unidentified Jedi scout

A Force-sensitive individual served as a scout for the Jedi Order. Around 22,800 BBY, the Jedi sensed a powerful resonance in the Force while wandering hyperlanes. Following the sensation, the scout traveled in a starship to the previously unknown Ilum system. There, the Jedi explored the planet Ilum, but the scout's findings failed to explain the presence in the Force possessed by that world, which was later discovered to be due to the planet's deposits of various crystals that could be used in the construction of Jedi lightsabers.

Text and facts from the “Unidentified Jedi scout/Legends” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.