However, we do know that it must at least be strong enough to not fly apart as it rotates, so it probably has a density similar to that of rocky asteroids; perhaps even denser, like metal.
Dennoch muss es stark genug sein, um bei der Rotation nicht fortgeschleudert zu werden, also vermutlich mit einer Dichte wie bei steinigen Asteroiden, vielleicht noch dichter, wie Metall.