It is soooo not a moon.
It has moons of its own.
The Rikers was en route to a moon elsewhere in the galaxy.
They crash on a planet.
"Navigator's Log: Vortex Rikers. We are on route to the prison moon. Long-range sensors are detecting uncharted magnetic masses in Gamma Sector 83H. The Captain has ordered a change in course."
"Captain's Log S. Kroon: Vortex Rikers. Altering our course may have proven detrimental to our mission.
We are caught in the gravitational field of an uncharted planet. I have ordered the engine foreman to divert power to the drives."
"First Officer's Log: Vortex Rikers. The prisoners have become more restless as we get closer to the prison moon. Security says they have the prisoners under control but several have had to be taken to the med lab for treatment."
"Chief Medical Officer's Log: Prison Vessel 254 Vortex Rikers. The constant fighting between the prisoners seems to be getting worse. At this rate, I will be out of supplies long before we reach the prison moon."
"Engine Foreman's Log: Prison Vessel 254 Vortex Rikers. I am juicing up all the power I can to escape from
the gravitational pull of this mysterious planet. It doesn't seem to be working."
"Chief Security Guard's Log: Prison Vessel 254 Vortex Rikers. They've pulled all the power to the drives to no effect.
We're spiralling towards the planet. I don't know what's going to happen to us."
I think that settles
that one