The accumulation shell of the exogorth Sy-O, known as the Big One, was incorrectly identified as an asteroid in the Hoth asteroid belt. This belt was, in reality, a Clew of exogorths. Subsequent to the Battle of Hoth, Han Solo, in an attempt to evade Imperial forces, piloted the Millennium Falcon into what he thought was a sizable crater on the asteroid; however, this "crater" was actually the open mouth of Sy-O, the exogorth.