Quaoar

Quaoar was the first trans-Neptunian object to be measured directly from Hubble Space Telescope images, using a method comparing images with the Hubble point spread function (PSF). In 2004, Quaoar was estimated to have a diameter of 1,260 km (780 mi) with an uncertainty of 190 km (120 mi), using Hubble's measurements.

Quaoar is roughly the same size as Pluto’s large moon Charon

Its relatively bright surface also hints that the world may have been geologically active in the not-too-distant past.

Composed half ice and half rock, astronomers have detected water ice there.

QUAOAR AND WEYWOT