Space · launch vehicle
Soyuz STB Fregat
PRSC
RETIRED
At a glance
Launches
14
Success rate
92.9%
13 ok · 1 failed
Payload to LEO
8,200 kg
Payload to GTO
3,250 kg
Manufacturer
Progress Rocket Space CenterStatus
RetiredFirst flight
21 Oct 2011Reusable
NoHeight
46.3 mDiameter
2.95 mLaunch mass
312 tLiftoff thrust
—Stages
3Launch cost
—Booster landings
—Links
WikipediaAbout
The 2.1b version adds an upgraded engine (RD-0124) with improved performance to the second stage. First launch took place from Plesetsk Cosmodrome Site 43 on 26 July 2008 with a classified military payload.
The 2.1b/ST version is sometimes called Soyuz ST-B.
Source The Space Devs — Launch Library 2
Last checked 29 Sept 2026