Nothing if which is mentioned.
BTW Warp fluctiation. Navigators have a power for that.
Basically you have a Gas giant that magically does not distort space around it. A space full of other objects. Which is strikingly contradictory to how you find an object in the first place. Its just minor really, but its that bit "Deus Ex machina" that is needed to tell a good story. No the adventure wouldnt be the same if the Orks simply had a asteroid base.
Cue Imperial March:
The Rebel base is on the jungle moon behind the gas giant.