The Staraker was an experimental, cutting-edge Imperial warship created at Foundry. It was stolen by Luke Skywalker, Leia Organa and Mici Shabandar. It crashed after being shot down over Alashan by a Death Star-like beam of destructive energy.
After teaming up with a stranded Imperial team and dispatching the creature responsible for them both being there, Luke and the rest got the ship up and running again and left the planet, taking the ship back to the Rebel Alliance as originally intended.