Launched called success on webcast, Arianespace CEO and head of Roscosmos both tweeted that sat is in planned orbit
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Historical mission record
This page records Soyuz STA/Fregat | CSO-2 and its reported outcome: Launch Successful. The date above is a historical record.
Source record updated . This is a source update, not a confirmed launch time.
Check the source: Soyuz Flight VS25 ↗ · Launch Library ↗
What changed?
Liftoff
per NOTAM A0474/20
Status reported by the mission data provider.
Mission
The CSO-2 (Composante Spatiale Optique-2) satellite is the second of three new-generation high-resolution optical imaging satellites for the French military, replacing the Helios 2 spy satellite series.
- Launch vehicle
- Soyuz STA Fregat
- Mission type
- Government/Top Secret
- Destination orbit
- Sun-Synchronous Orbit
- Launch pad
- Soyuz Launch Complex
- Provider
- Arianespace
The vehicle
Published configuration and flight history.

Soyuz STA Fregat
The 2.1a version includes conversion from analog to digital flight control system and uprated engines on the booster and the first stage with improved injection systems. The new digital flight control and telemetry systems allow the rocket to launch from a fixed rather than angled launch platform and adjust its heading in flight. A digital control system also enables the launch of larger commercial satellites with wider and longer payload fairings such as the ST-type fairing. These fairings introduce too much aerodynamic instability for the old analog system to handle. This stage continues to use the RD-0110 engine. The 2.1a/ST version is sometimes called Soyuz ST-A.
- Height
- 46.3 m
- Diameter
- 2.95 m
- Stages
- 3
- Recorded launches
- 8
- First flight
- 2011-12-17
Recorded timing
This is a mission record, not an upcoming calendar appointment.
A single scheduled moment. The schedule may change before launch.
Launch site & orbit
Guiana Space Centre, French Guiana
Launch site & orbit
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Understand this orbit
Coverage & sources
Links supplied by the mission data provider.
Coverage and times may change.
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