The R-26 was a second-generation intercontinental ballistic missile (ICBM) designed but not deployed by the Soviet Union during the Cold War. Control system of it was designed at NPO "Electropribor" (Kharkiv, Ukraine). The missile was mistakenly identified as an R-9 Desna and given the NATO reporting name SS-8 Sasin. Within the Soviet Union, it carried the GRAU index 8K66.