Weywot (formal designation (50000) Quaoar I) is the only known moon of the trans-Neptunian dwarf planet Quaoar. It was discovered by Michael Brown and Terry-Ann Suer using images taken by the Hubble Space Telescope on 14 February 2006. It is named after the Tongva sky god and son of Quaoar. Weywot is about 165Â km (103Â mi) in diameter and orbits Quaoar every 12.4 days at an average distance of 13,300Â km (8,300Â mi). Weywot is thought to play a role in maintaining Quaoar's outer ring by gravitationally influencing it in an orbital resonance.