Yangoor is the largest known crater on the surface of the Uranian moon Ariel. The name comes from a spirit that brings day in Australian Aboriginal mythology. It is about 80 km in diameter and is located approximately 450 km from Ariel's south pole. The northwestern edge of the crater was erased by formation of ridged terrain. The crater lacks bright ejecta deposits and was imaged for the first time by the Voyager 2 spacecraft in January 1986.
- Plescia, J. B. (May 21, 1987). "Geological terrains and crater frequencies on Ariel". Nature 327 (6119): 201–204. Bibcode:1987Natur.327..201P. doi:10.1038/327201a0. ISSN 0028-0836.
- Smith, B. A.; Soderblom, L. A.; Beebe, A.; Bliss, D.; Boyce, J. M.; Brahic, A.; Briggs, G. A.; Brown, R. H.; Collins, S. A. (4 July 1986). "Voyager 2 in the Uranian System: Imaging Science Results". Science 233 (4759): 43–64. Bibcode:1986Sci...233...43S. doi:10.1126/science.233.4759.43. PMID 17812889.
- USGS/IAU. "Yangoor on Ariel". Gazetteer of Planetary Nomenclature. USGS Astrogeology. Retrieved 2010-12-04.
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