Largest asteroid in the main asteroid belt

According to Official Guinness Records,

The largest asteroid is 1 Ceres (the first discovered, by G. Piazzi at Palermo, Sicily on 1 January 1801), with an average diameter of 941 km (584.7 miles). As of 2017, it is now considered a "dwarf planet".

For a complete list of Unknown date records, please visit Unknown date Guinness Records in Italy.

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