Rokot
 |
|
| Function | Orbital carrier rocket |
|---|---|
| Manufacturer | Eurockot Launch Services |
| Country of origin | Soviet Union |
| Size | |
| Height | 29 metres (95 ft) |
| Diameter | 2.5 metres (8 ft 2 in) |
| Mass | 107,000 kilograms (236,000 lb) |
| Stages | 3 |
| Capacity | |
| Payload to LEO | 1,950 kilograms (4,300 lb) |
| Payload to SSO | 1,200 kilograms (2,600 lb) |
| Launch history | |
| Status | Active |
| Launch sites |
Baikonur 175/1 (inactive) Plesetsk 133/3 |
| Total launches | 30 |
| Successes | 27 |
| Failures | 2 |
| Partial failures | 1 |
| First flight | 20 November 1990 26 December 1994 (orbital) |
| First stage | |
| Diameter | 2.5 m (8.2 ft) |
| Engines | 3 RD-0233 (15D95) 1 RD-0234(15D96) |
| Thrust | 2,080 kN (470,000 lbf) |
| Specific impulse | 310s |
| Burn time | 120 seconds |
| Fuel | N2O4/UDMH |
| Second stage | |
| Diameter | 2.5 m (8.2 ft) |
| Engines | 1 RD-0235 (15D113) 1 RD-0236 (15D114) |
| Thrust | 255.76 kN (57,500 lbf) |
| Specific impulse | 310s |
| Burn time | 180 seconds |
| Fuel | N2O4/UDMH |
| Third stage - Briz-KM | |
| Engines | 1 S5.98M |
| Thrust | 19.6 kilonewtons (4,400 lbf) |
| Specific impulse | 325 sec |
| Burn time | 3,000 seconds |
| Fuel | N2O4/UDMH |
The Rokot (Russian: Рокот meaning Rumble), also transliterated Rockot, is a Russian space launch vehicle that can launch a payload of 1,950 kilograms into a 200 kilometre high Earth orbit with 63° inclination. It is a derivative of the UR-100N (SS-19 Stiletto) intercontinental ballistic missile (ICBM), supplied and operated by Eurockot Launch Services. The first launches started in the 1990s from Baikonur Cosmodrome out of a silo. Later commercial launches commenced from Plesetsk Cosmodrome using a launch ramp specially rebuilt from one for the Kosmos-3M rocket. The cost of the launcher itself was about 15 million in 1999;Eurockot contract with ESA for launching Swarm in September 2013 was worth €27.1 million ($36 million).
Rokot's total mass is 107 tonnes, its length 29 metres and its maximum diameter 2.5 metres. The liquid-fueled rocket comprises three stages. The lower two are based on the Soviet UR-100N ICBM; the first stage uses an RD-0244 engine, while the second stage uses an RD-0235. The third stage is a Briz-KM (Russian: Бриз-КМ meaning Breeze-KM), which has a mass of about 6 tonnes when fuelled, and is capable of flying for 7 hours and reigniting its engine six times during flight, allowing different satellites to be placed into different orbits. All stages use UDMH (unsymmetrical Dimethylhydrazine) as fuel and dinitrogen tetroxide as oxidiser. The Strela is a similar rocket, also based on the SS-19.
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