Orbiter's back-story has alot of room to play with. At the time the crew arrived there, Orbiter was powered by Feldon, but this need not have been the case originally.

Orbiter at various times could be powered by: Solar power (normal photo-voltaics); Stellar power; a feed from Alpha III (if Orbiter was Feldon-powered, surely Belkov's Alpha-III was similarly powered).

Orbiter has several possible origins: an ancient civilsation built it; the Mecronians built it; Belkov built it; a recent manufacturer built it (to Belkov's design, or not).

Orbiter can become Belkov's by: accident; gift (eg. of the Federation); swindle; purchase; commission; fortune (ie. through gambling / gaming).

Orbiter is either; self-controlled; controlled by Gambit; or somehow united with Gambit.

DC