|Quadrangle||Ismenius Lacus quadrangle|
|Eponym||Boris Semeykin, a Soviet astronomer (1900–1937)|
Semeykin is a crater in the Ismenius Lacus quadrangle on Mars. It is located at 41.8° north latitude and 351.4° west longitude. The crater measures approximately 74 kilometers in diameter and was named after Boris Semeykin, a Soviet astronomer (1900–1938).
MOLA map showing Semeykin Crater and other nearby craters. Colors indicate elevations.
Semeykin Crater, as seen by CTX camera on(Mars Reconnaissance Orbiter).
Wide view of sets of dipping layers in Semeykin, as seen by HiRISE under HiWish program
Close view of dipping layers in Semeykin, as seen by HiRISE under HiWish program