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FunctionCarrier rocket
Country of origin Ukraine
Diameter3.9 metres (13 ft)
Mass458,900 kilograms (1,011,700 lb)
Payload to LEO12,030 kilograms (26,520 lb)
Associated rockets
Launch history
Launch sitesBaikonur Site 45/1
Total launches2[1][2]
First flight29 June 2007
Last flight8 November 2011
First[3] stage
Length32.9 m (108 ft)
Diameter3.9 m (13 ft)
Empty mass27,564 kg (60,768 lb)
Gross mass354,350 kg (781,210 lb)
Propellant massRG-1: 90,219 kg (198,899 lb)
LOX: 236,567 kg (521,541 lb)
ThrustSea Level: 7,257 kN (1,631,000 lbf)
Vacuum: 7,908 kN (1,778,000 lbf)
Specific impulseSea Level: 309.5 s (3.035 km/s)
Vacuum: 337.2 s (3.307 km/s)
Burn time140-150 seconds
Second[3] stage
Length10.4 m (34 ft)
Diameter3.9 m (13 ft)
Empty mass8,307 kg (18,314 lb)
Gross mass90,794 kg (200,167 lb)
Propellant massRG-1: 23,056 kg (50,830 lb)
LOX: 59,431 kg (131,023 lb)
Engines1 RD-120
1 RD-8
ThrustRD-120: 912 kilonewtons (205,000 lbf)
RD-8: 79.4 kilonewtons (17,800 lbf)
Specific impulseVacuum:
RD-120: 350 s (3.4 km/s)
RD-8: 342.8 s (3.362 km/s)
Burn time360-370 seconds

The Zenit-2M, Zenit-2SB, Zenit-2SLB or Zenit-2FG is a Ukrainian expendable carrier rocket derived from the Zenit-3SL. It is a member of the Zenit family of rockets, which were designed by the Yuzhnoye Design Bureau. It is a modernised version of the Zenit-2, incorporating modifications and upgrades made to the design for the Sea Launch programme.

Launches of Zenit-2M rockets are conducted from Baikonur Cosmodrome Site 45/1. Commercial launches are conducted by Land Launch, and use the designation 2SLB, however as of 2011, no commercial launches have been ordered. Launches conducted by Roskosmos or the Russian Space Forces use the designation 2M. The designation 2SB can also be applied to the rocket when it is being used as part of a larger vehicle, such as the Zenit-3SLB.

The first launch of a Zenit-2M occurred on 29 June 2007, carrying the last Tselina-2 ELINT satellite for the Russian Space Forces, Tselina-2 satellites having been previously launched by older Zenit-2 rockets. The second launch, carrying the Fobos-Grunt and Yinghuo-1 spacecraft, was conducted on 8 November 2011, using a modified configuration designated the Zenit-2FG. This configuration incorporated the payload fairing used on the Zenit-3F rocket, and a special adaptor for the Fobos-Grunt spacecraft, which incorporated a Fregat-derived propulsion system.

Zenit-2 and Zenit-2M have been superseded by the Zenit-3SLB evolution flying since 2008. On 11 December 2015 the Zenit-3 was flown for probably the last time, with another Zenit-3 in storage with expired warranty,[4] so it is unlikely that the older Zenit-2 and Zenit-2M versions will fly again.

See also[edit]


  • Wade, Mark. "Zenit". Encyclopedia Astronautica. Retrieved 2009-04-15.
  • Krebs, Gunter. "Zenit family". Gunter's Space Page. Retrieved 2009-04-15.
  1. ^ Krebs, Gunter. "Zenit-2SLB / Zenit-2M". Gunter's Space Page. Retrieved 2016-05-16.
  2. ^ Krebs, Gunter. "Zenit-2FG". Gunter's Space Page. Retrieved 2016-05-16.
  3. ^ a b "Zenit-2SB". Roscosmos (in Russian). Retrieved 7 April 2016.
  4. ^ Clark, Stephen (2015-12-09). "Zenit rocket raised on launch pad for possible final flight". Spaceflight Now.