|Eponym||Pyotr Ilyich Tchaikovsky|
Chaikovskij (sometimes Tchaikovsky) is a crater on Mercury. It has a diameter of 171 kilometers. Its name was adopted by the International Astronomical Union (IAU) in 1976. Chaikovskij is named for the Russian composer Pyotr Ilyich Tchaikovsky, who lived from 1840 to 1893.
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