Twelve Olympians
This minor planet was named for the "God of the Sea", Poseidon, one of the Twelve Olympians in Greek mythology. He was also referred to as "Earth-Shaker" due to his role in provoking earthquakes, which were then thought to be caused by ocean waves beating on the shore. He was the brother of Zeus "(see 5731 Zeus)", and an enemy of the Trojans in the Trojan War. The was published by the Minor Planet Center on 30 January 1991 ().