Guinness is a crater on Mercury. Its name was adopted by the International Astronomical Union (IAU) on February 7, 2025. The crater is named for Irish painter May Guinness.
The central peak complex of Guinness is a dark spot associated with hollows.Zhiyong Xiao, Robert G. Strom, David T. Blewett, Paul K. Byrne, Sean C. Solomon, Scott L. Murchie, Ann L. Sprague, Deborah L. Domingue, Jörn Helbert, 2013. Dark spots on Mercury: A distinctive low-reflectance material and its relation to hollows. Journal of Geophysical Research Planets. doi.org/10.1002/jgre.20115
Guinness is to the southwest of the crater Munkácsy.
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