Explore This SectionScienceThe Solar SystemQuaoarSolar System ResourcesCurated Resource PackagesSolar System Home QuaoarAugust 31, 2016 NASA's New Horizons spacecraft observations of Kuiper Belt object Quaoar ("Kwa-war"), which - at 690 miles or 1,100 kilometers in diameter - is roughly half the size of Pluto. Downloads Quaoar Sep 4, 2023 GIF (1.62 MB) Quaoar Sep 4, 2023 JPEG (426.40 KB)