FunctionCarrier rocket
Country of originUkraine
Height59.6 metres (196 ft)
Diameter3.9 metres (13 ft)
Mass471,000 kilograms (1,038,000 lb)
Payload to GTO
Mass4,000 kilograms (8,800 lb)[1]
Associated rockets
Launch history
Launch sitesBaikonur Site 45/1
First flight20 January 2011 (Elektro-L No.1)
Last flight26 December 2017 (AngoSat 1)
First stage – Zenit-2SB First stage[2]
Height32.9 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)
Powered byRD-171
Maximum 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 stage – Zenit-2SB Second stage[2]
Height10.4 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)
Powered by1 RD-120
1 RD-8
Maximum 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
PropellantLOX / RG-1
Third stage – Fregat-SB
Powered by1 S5.92
Maximum thrust19.6 kilonewtons (4,400 lbf)
Specific impulse327 s
Burn time877 s
Propellantdinitrogen tetraoxide / UDMH

The Zenit-3F, Zenit-3SLBF or Zenit-2SB/Fregat is an expendable carrier rocket. It is a member of the Zenit family of rockets, which were designed by Yuzhnoye Design Bureau of Ukraine.

Launches of Zenit-3SLBF rockets are conducted from Baikonur Cosmodrome Site 45/1. The rocket consists of a Zenit-2SB (Zenit-2M) core vehicle, with a Fregat-SB upper stage, developed by NPO Lavochkin of Russia, in place of the Block-DM used on the Zenit-3SL and 3SLB.

The first launch of a Zenit-3F took place on 20 January 2011. The payload was an Elektro-L new generation weather satellite.[3] A Zenit-3F was also used to successfully launch the Spektr-R radio astronomy satellite on 18 July 2011.


Main article: List of Zenit launches

Flight No. Date and time (UTC) Payload Orbit Outcome
1 20 January 2011
Elektro-L No.1 GEO Success
2 18 July 2011
Spektr-R HEO Success
3 11 December 2015
Elektro-L No.2 GEO Success
4 26 December 2017
AngoSat 1 GEO Success


  1. ^ "Zenit-3SLBF". Yuzhnoye.
  2. ^ a b "Zenit-2SB". Roscosmos (in Russian). Retrieved 7 April 2016.
  3. ^ "Russia meteo satellite Electro-L successfully orbited". ITAR-TASS. 2011-01-21. Archived from the original on 2011-01-22.
  4. ^ Krebs, Gunter. "Zenit family". Gunter's Space Page. Retrieved 2009-04-15.