Themis Demonstrator | T1H-1
European Space Agency · Esrange Space Center
Q4 2026
Rocket file · LV-523
Themis Demonstrator
ArianeGroup · IN SERVICE
Themis Demonstrator is a reusable launch vehicle built by ArianeGroup. It stands 28.0 m tall. It hasn't flown yet. Its next flight is Themis Demonstrator | T1H-1 for European Space Agency, no earlier than Q4 2026.
Specification
Vehicle spec sheet
ON FILE
Height28.0 m
Diameter3.5 m
Payload to LEONOT ON FILE
Payload to GTONOT ON FILE
Maiden flightNOT ON FILE
ReusableYes, stage recovery
Launch costNOT ON FILE
StatusIN SERVICE
As listed by Launch Library 2. The cost is Launch Library’s figure, not a quoted price. Figures for rockets outside the sixty most-flown were last read on 2026-11-05.
Flight record
Reliability
NO FLIGHTS
Total flights0
Successful0
Failed0
Success rateNO DATA
Landing attempts0
Landing successN/A
Scheduled1
About Themis Demonstrator
Themis is an ESA rocket prototype – a flagship European demonstrator for low-cost rocket recovery and reuse technologies. Powered by the reusable, methane-fuelled engine Prometheus, it is developed with ArianeGroup as prime contractor and building on decades of European research and experience in rocketry and space operations, Themis is designed to launch, land vertically and live on for another mission.
Upcoming flights
Themis Demonstrator in the archive
From NASA's public image library and Wikimedia Commons. Each photo shows the credit its licence asks for and links back to where it came from.
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Common questions
- How many times has Themis Demonstrator flown?
- Themis Demonstrator hasn't flown yet, but 1 flights are scheduled.
- What is Themis Demonstrator's success rate?
- Themis Demonstrator hasn't flown, so there's no success rate yet.
- When is the next Themis Demonstrator launch?
- Themis Demonstrator | T1H-1, flown by European Space Agency. It's set for no earlier than Q4 2026 from Launch Complex 3B.
- How much can Themis Demonstrator lift to orbit?
- Launch Library 2 doesn't list a payload figure for Themis Demonstrator.
- Is Themis Demonstrator reusable?
- Yes. Launch Library 2 lists Themis Demonstrator as reusable. On most reusable rockets that's the first stage, not the whole rocket.