Zenit-2M

This article is about the rocket, for the satellite, see Zenit (satellite)

Zenit-2M/2SB/2SLB

Zenit-2M
Function	Carrier rocket
Manufacturer	Yuzhnoye
Country of origin	Ukraine
Size
Height	57.35 metres (188.2 ft)
Diameter	3.9 metres (13 ft)
Mass	458,900 kilograms (1,011,700 lb)
Stages	Two
Capacity
Payload to LEO	12,030 kilograms (26,520 lb)
Associated rockets
Family	Zenit
Derivatives	Zenit-3SLB Zenit-3SLBF
Launch history
Status	Active
Launch sites	Baikonur Site 45/1
Total launches	2
Successes	2
First flight	29 June 2007
First stage
Engines	1 RD-171
Thrust	8,180 kilonewtons (1,840,000 lbf)
Specific impulse	337 sec
Burn time	150 seconds
Fuel	RP-1/LOX
Second stage
Engines	1 RD-120 1 RD-8
Thrust	912 kilonewtons (205,000 lbf) 79.5 kilonewtons (17,900 lbf)
Specific impulse	349 sec
Burn time	315 seconds
Fuel	RP-1/LOX

The Zenit-2M, Zenit-2SB or Zenit-2SLB is an 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 also 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.