Wikipedia
Semeykin (crater)
Semeykin Crater is a crater in the Ismenius Lacus quadrangle on Mars. It is located at 41.8° north latitude and 351.4° west longitude. Semeykin Crater is 76.0 km in diameter and was named after Boris Semeykin, a Soviet astronomer (1900-1937).
Wikilyotmola.jpg|MOLA map showing Semeykin Crater and other nearby craters. Colors indicate elevations. Wikisemeykin.jpg|Semeykin Crater, as seen by CTX camera on( Mars Reconnaissance Orbiter).