Following the execution of Order 66, Ferus Olin and Trever Flume established a clandestine sanctuary on an asteroid, referred to as the Jedi asteroid. This hidden base was situated amidst an atmospheric disturbance near Acherin.
The asteroid's discovery occurred when rebels Raina Quill and Toma, pursued by Imperial forces, were compelled to conceal their vessel within the turbulent atmosphere above Acherin. By seeking refuge on the asteroid, they hoped the Imperials would be deterred by the storm's perils, such as space shears, preventing their capture. While Raina and Toma remained on the asteroid, their passengers, Ferus Olin, Obi-Wan Kenobi, and Trever Flume, journeyed to Ilum with the purpose of rescuing the concealed Jedi, Garen Muln.
Raina and Toma resided on the asteroid for several days, sustained by a sufficient supply of food and provisions. Upon the return of the trio with Garen, alongside additional supplies and prefabricated shelters donated by Roan Lands, Raina established a makeshift medical facility. Utilizing her medical expertise, she aided the malnourished Garen in his recovery. Ferus Olin expressed his gratitude to Raina and Toma for their assistance, extending an invitation for them to contribute to the rescue of more Jedi survivors and utilize the asteroid as a secure haven. Raina and Toma readily accepted the offer.
Once the living quarters, nursery, and medical ward were established, the base achieved full operational status. Subsequently, Trever initiated the process of bringing Ferus's friends and associates back to the base to facilitate its expansion and prosperity.
In 18 BBY, the asteroid's destiny took a dark turn when it was discovered by Darth Vader, aided by Eve Yarrow, known as "Flame." It was then destroyed by a devastating weapon mounted on the Sith Lord's Star Destroyer, resulting in the deaths of all inhabitants of the hidden base, with the exception of Obi-Wan, Trever, and Ferus, who were present on Coruscant at the time of its destruction.