As of 2026-10-12, Catullus tops the list with 1,002 km.
- #1 Catullus — 1,002 km
crater on Mercury
Catullus is a crater on Mercury. Its name was adopted by the International Astronomical Union (IAU) on December 19, 2012. Catullus is named for the Roman poet Catullus. Read more on Wikipedia.
Wikidata - #2 Mamaldi — 480 km
crater on Rhea
source Wikidata - #3 Aneirin — 467 km
crator on Mercury
Aneirin is a crater on Mercury. It has a diameter of 467 kilometers. Its name was adopted by the International Astronomical Union (IAU) on June 13, 2014. Aneirin is named for the Welsh poet Aneirin. Prior to naming, the crater was referred to as b37. It is Tolstojan in age. Read more on Wikipedia.
Wikidata - #4 Evander — 350 km
crater
Evander is the largest impact basin on Saturn's moon Dione, located near its south polar regions. It is named after the mythological Roman hero Evander of Pallene, son of Hermes. The name "Evander" was officially approved by the International Astronomical Union (IAU) on 17 March 2008. Read more on Wikipedia.
Wikidata - #5 Epigeus — 343 km
impact crater on Ganymede, a moon of Jupiter
Epigeus is one of the largest known impact crater on Jupiter's Galilean satellite Ganymede, with a diameter of 343 km. It is about 6.5% of the mean equatorial diameter of Ganymede, which is about 5,270 km (3,270 mi). Read more on Wikipedia.
Wikidata - #6 Telemus — 320 km
crater on Tethys
source Wikidata - #7 Powehiwehi — 271 km
crater on Rhea
source Wikidata - #8 Raditladi Basin — 258 km
crater on Mercury
Raditladi is a large impact crater on Mercury with a diameter of 263 km. Inside its peak ring there is a system of concentric extensional troughs (graben), which are rare surface features on Mercury. The floor of Raditladi is partially covered by relatively light smooth plains, which are thought to be a product of the effusive volcanism. The troughs may also have resulted from volcanic processes under the floor of Raditladi. The basin is relatively young, probably younger than one billion... Read more on Wikipedia.
Wikidata - #9 Naimon — 244 km
crater on Iapetus
source Wikidata - #10 Ganelon — 230 km
crater on Iapetus
source Wikidata