Zenit-2 at Site 45/1
|Country of origin||Ukraine|
|Height||57 metres (187 ft)|
|Diameter||3.9 metres (13 ft)|
|Mass||444,900 kilograms (981,000 lb)|
|13,740 kilograms (30,300 lb)|
|5,000 kilograms (11,000 lb)|
|Launch sites||Baikonur Site 45|
|First flight||13 April 1985|
|Thrust||8,180 kilonewtons (1,840,000 lbf)|
|Specific impulse||337 sec|
|Burn time||150 seconds|
|Thrust||912 kilonewtons (205,000 lbf)
79.5 kilonewtons (17,900 lbf)
|Specific impulse||349 sec|
|Burn time||315 seconds|
The Zenit-2 is a Ukrainian, previously Soviet, expendable carrier rocket. First flown in 1985, it has been launched 37 times, with six failures. It is a member of the Zenit family of rockets, and was designed by the Yuzhnoye Design Bureau. A modified version, the Zenit-2S, is used as the first two stages of the Sea Launch Zenit-3SL rocket. Launches of Zenit-2 rockets are conducted from Baikonur Cosmodrome Site 45/1. A second pad, 45/2, was also constructed, but was only used for two launches before being destroyed in an explosion. A third pad, Site 35 at the Plesetsk Cosmodrome was never completed, and work was abandoned after the dissolution of the Soviet Union.
The Zenit-2 is currently being replaced by the Zenit-2M, which incorporates enhancements made during the development of the Zenit-3SL, and it is unclear whether any remain to be launched. The Zenit-2 has a fairly low flight rate as the Russian government usually avoids flying national security payloads on Ukrainian rockets.
During the late 1990s, the Zenit-2 was marketed for commercial launches. Only one such launch was conducted, with a group of Globalstar satellites, which ended in failure after a computer error resulted in the premature cutoff of the second stage.
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