Soyuz at the Guiana Space Centre

Soyuz at the Guiana Space Centre (also known as Soyuz at CSG or Arianespace Soyuz) was a European Space Agency (ESA) programme for operating Soyuz-ST launch vehicles from Centre Spatial Guyanais (CSG), providing medium-size launch capability for Arianespace to complement the light Vega and heavy-lift Ariane 5.[3] The Soyuz vehicle was supplied by the Roscosmos with TsSKB-Progress and NPO Lavochkin, while additional components were supplied by Airbus, Thales Group and RUAG.[1]:28–30 Autor LV (ICBM) = NPO "Energia", Kaliningrad.

Soyuz ST (Guiana Space Centre)
Inaugural launch on 21 October 2011
FunctionMedium-class launch vehicle to complement the light Vega and heavy Ariane 5
ManufacturerProgress Rocket Space Centre, NPO Lavochkin
Country of originRussia
Height46.2 m (152 ft)
Diameter10.3 m (34 ft)
Mass308 t (303 long tons; 340 short tons)
Payload to GTO
Mass3,250 kg (7,170 lb)
Payload to GEO
Mass1,440 kg (3,170 lb)
Payload to SSO
Mass4,400 kg (9,700 lb)[1]:43
Associated rockets
FamilySoyuz-2 (R-7)
Launch history
Launch sitesCentre Spatial Guyanais
Total launches27
Partial failure(s)1
First flight21 October 2011 [2]
Last flight10 February 2022
No. boosters4 [1]:21
Height19.6 m (64 ft)
Diameter2.68 m (8 ft 10 in)
Empty mass3,784 kg (8,342 lb)
Gross mass44,413 kg (97,914 lb)
Powered by1 RD-107A
Maximum thrust838.5 kN (188,500 lbf)
Specific impulse262 seconds
Burn time118 seconds
PropellantLOX / kerosene
Core stage
Height27.1 m (89 ft)
Diameter2.95 m (9 ft 8 in)
Empty mass6,545 kg (14,429 lb)
Gross mass99,765 kg (219,944 lb)
Powered by1 RD-108A
Maximum thrust792.5 kN (178,200 lbf)
Specific impulse255 seconds
Burn time286 seconds
PropellantLOX / kerosene
Second stage (ST-B)
Height6.7 m (22 ft)
Diameter2.66 m (8 ft 9 in)
Empty mass2,355 kg (5,192 lb)
Gross mass27,755 kg (61,189 lb)
Powered by1 RD-0124
Maximum thrust297.9 kN (67,000 lbf)
Specific impulse359 seconds
Burn time270 seconds
PropellantLOX / kerosene
Upper stage – Fregat
Height1.5 m (4 ft 11 in)
Diameter3.35 m (11.0 ft)
Empty mass920 kg (2,030 lb)
Gross mass7,558 kg (16,663 lb)
Powered byS5.92
Maximum thrust19.85 kN (4,460 lbf) / 14 kN (3,100 lbf)
Specific impulse332 seconds
Burn timeUp to 1100 seconds (up to 20 starts)
PropellantN2O4 / UDMH

The Arianespace Soyuz project was announced by the ESA in 2002. Cooperation with Russia began in two areas: construction of a launch site for Soyuz in CSG and development of the Soyuz launch vehicle modified for the Guiana Space Centre. A Programme Declaration was signed in 2003 and funding along with final approval was granted on 4 February 2005.[4][5] Initial excavation for the Ensemble de Lancement Soyouz (ELS; Soyuz Launch Complex) began in 2005, construction started in 2007, and the launch complex was completed in early 2011,[6] allowing Arianespace to offer launch services on the modified Soyuz ST-B to its clients.[1][7] Two early flights, VS02 and VS04, and a recent flight, VS17, used the Soyuz ST-A variant.[8][9][10] Since 2011, Arianespace has ordered a total of 23 Soyuz rockets, enough to cover its needs until 2019 at a pace of three to four launches per year.[11][12]:10 Due to Russia's invasion of Ukraine, Soyuz launches from the Guiana Space Centre have been suspended.[13]

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