Yonada

Yonada was a hollow asteroid-world, 200 miles in diameter, that was in actuality a titanic colony ship created by the Fabrini. The asteroid was en route to a planet for colonization after the Fabrini homeworld was destroyed around 7800 BC, but its population eventually forgot their origins, and the computer systems that navigated the vessel decayed, sending Yonada on a collision course with the inhabited planet Daran V. The original U.S.S. Enterprise was sent to investigate Yonada, and were able to correct the ship back to its original flight path- shortly thereafter, in 2269, the population finally arrived on their New Fabrina.