UR-100

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UR-100 SS-11 Sego
Type	ICBM
Service history
In service	21 July 1967 (document №705-235)–1974
Used by	Soviet Union
Production history
Manufacturer	design by OKB-52 of V.N.Chelomey, production by Khrunichev Machine-Building Plant, Omsk aviation facility №166 "Polyot", Orenburg aviation facility №47 "Strela"
Specifications
Mass	41.4-42.3 tonnes
Length	16,930 mm
Diameter	2,000 mm
Warhead	1
Blast yield	1 Mt by NII-1011, Chelyabinsk-70
Engine	two-stage liquid fuel first stage 8S816 with a 15D2 module (three RD-0216 and one RD-0217 engines) second stage 8S817 with one 15D13 main and one four-nozzle 15D14 (RK-3) engines)
Operational range	10,600 km
Guidance system	inertial
Accuracy	1000–1400 metres CEP

The UR-100 (Russian: УР-100) was an intercontinental ballistic missile (ICBM) developed and deployed by the Soviet Union from 1966 to 1996. UR (УР) in its designation stood for Universal Rocket (Russian: Универсальная Ракета). It was known during the Cold War by the NATO reporting name SS-11 Sego and internally by the GRAU index 8K84. The Strela and Rokot carrier rockets were based on it.

The similar designation UR-100MR (Russian: УР-100МР) actually refers to an entirely different missile, the MR-UR-100 Sotka (SS-17 Spanker).