The Magesteron is a location that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It is a space ship and main command center of the D'novulans. Its commander is Captain Oe.
The Magesteron was likely built by the D'novulans. Captain Oe was leading the D'novulans towards the Mezzo Jillion trade center when they received a message from the Blodex, asking for their assistance on helping Sonic take steps further on reaching back into Mobius after the climactic Xorda Attack on Mobius. However, the Cemerant-16 space orb had exploded upon their journey to the trade center, with the meteorites of the space orb reaching the Magesteron. With all but Sonic and Captain Oe out of the ship via bio-pods, Captain Oe paralyzed Sonic and put him inside the last escape pod, sacrificing himself and dying from the impacting meteorites. The space ship was then obliterated by the asteroids.