|Lat: 35.2°N, Long: 151.3°E, Diam: 41 km, Depth: km, Rükl: (farside)|
left: Clementine . right: LROC
- Named for Andrian Grigoryevich Nikolayev (September 5, 1929 – July 3, 2004), a Soviet cosmonaut. Nikolayev flew on two space flights: Vostok 3 (effectively becoming the third Soviet cosmonaut) and Soyuz 9. He set new endurance records for the longest time a human being had remained in orbit. Nikolayev was also the first person to make a television broadcast from space, in August 1962. Vostok 3 was part the first dual space flight, with Pavel Popovich on Vostok 4. This is one of the few lunar features that was named for a living person.
- This name is one of twelve honoring living U.S. and Soviet astronauts and cosmonauts approved by the IAU in 1970 and published in Menzel, 1971.