Oberon III

Oberon III is a protoplanet that orbits third from the star of the unclaimed Oberon system. Alongside its sister protoplanet Oberon IV, it is theorized that it formed in the Oberon system after its original star went supernova and collapsed into a neutron star. However, it failed to gain enough mass from the dust and gas of the newly-formed accretion disk to become a full planet.