Korolev is an ice-filled impact crater in the Mare Boreum quadrangle of Mars, located at 73° north latitude and 165° east longitude.

[2] The crater was named after Sergei Korolev (1907–1966), the head Soviet rocket engineer and designer during the Space Race in the 1950s and 1960s.

[2] The ice is permanently stable because the crater acts as a natural cold trap.

The thin Martian air above the crater ice is colder than air surrounding the crater; the colder local atmosphere is also heavier so it sinks to form a protective layer, insulating the ice, shielding it from melting and evaporation.

[3] In the TV show For All Mankind, Korolev crater is the location of methane deposits that main character Kelly Baldwin seeks to investigate for signs of life.