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Vega 2023: The Year Europe’s Small-Lift Rocket Became a Lifeline

The year 2023 was a period of intense pressure, critical mission success, and frustrating delays for the Vega rocket family. As Europe grappled with a significant crisis in its independent access to space, the standard Vega rocket—designed to be phased out for its newer, more powerful successor, Vega-C—unexpectedly found itself as the continent’s most critical operational launch vehicle for small and medium payloads. The story of “Vega 2023” is one of a successful return-to-flight for the legacy launcher contrasting sharply with the prolonged grounding and major technical setbacks for the future-oriented Vega-C.

The Context: Europe’s Launch Crisis

Heading into 2023, the European space sector faced an unprecedented launch services crunch, a situation often referred to as a “launch gap.” Several factors converged to create this challenging environment:

• Ariane 5 Retirement: The venerable Ariane 5, Europe’s heavy-lift workhorse, was slated for retirement, with its final two flights successfully completed in April and July of 2023.
• Ariane 6 Delays: The successor, Ariane 6, experienced further development delays, pushing its debut flight well into the future.
• Soyuz Suspension: Following geopolitical events, Arianespace’s ability to operate the Russian Soyuz rocket from the Guiana Space Centre in French Guiana was suspended, removing a reliable, medium-lift option from their manifest.
• Vega-C Failure: Most immediately, the upgraded Vega-C, which was supposed to be fully operational and take over from the original Vega, suffered a major failure on its second mission, VV22, in December 2022, leading to its immediate grounding.

With the Ariane 5 gone, Ariane 6 delayed, Soyuz unavailable, and Vega-C sidelined, the responsibility for maintaining European autonomous access to space for all but the largest missions fell squarely onto the shoulders of the original, small-lift Vega rocket.

The Lifeline: Successful Return-to-Flight with VV23

The most significant operational event for the Vega family in 2023 was the successful launch of the VV23 mission. This flight marked the first for any Vega-class vehicle since the Vega-C failure ten months prior, serving as a much-needed morale and operational victory for Arianespace and the European Space Agency (ESA).

The mission lifted off from the Guiana Space Centre in Kourou, French Guiana, on October 8, 2023 (or October 9 UTC). The launch carried a diverse set of payloads into a Sun-synchronous orbit, showcasing Vega’s capability as a small-satellite delivery platform.

The VV23 Mission Payloads

The VV23 flight was a multi-payload mission, delivering a total of twelve satellites into orbit.

The primary payloads included:

• THEOS-2 (Thailand Earth Observation System-2): A high-resolution Earth-observation satellite for the government of Thailand’s Geo-Informatics and Space Technology Development Agency (GISTDA). This 417-kilogram satellite, built by Airbus Defence and Space, is designed to provide data for applications such as land use planning, agricultural monitoring, and flood risk management.
• Triton (FORMOSAT-7R): A weather satellite developed by Taiwan’s space agency, equipped with a Global Navigation Satellite System-Reflectometry (GNSS-R) instrument to collect data on typhoons and other meteorological phenomena.

Additionally, the mission utilized the Small Spacecraft Mission Service (SSMS) dispenser to launch ten auxiliary CubeSats for six different customers, further demonstrating Vega’s capability to offer rideshare opportunities.

The success of the VV23 flight was paramount. It not only fulfilled important launch contracts for international partners but also successfully broke the string of European launch setbacks, providing an essential operational lifeline while the next-generation vehicles remained grounded.

The Challenge: Vega-C’s Prolonged Grounding

While the older Vega rocket provided a critical win, the story of “Vega 2023” is dominated by the continued technical challenges plaguing the new Vega-C. The upgraded vehicle remained grounded throughout the year following the failure of its second flight (VV22) in December 2022, which was traced to a flaw in the nozzle of the new Zefiro 40 second stage motor.

The Setback and Nozzle Redesign

An Independent Enquiry Commission (IEC) was established to investigate the VV22 failure and recommend corrective actions. Initially, a task force worked toward a return-to-flight by the end of 2023. However, this goal was shattered by a major technical failure mid-year.

On June 28, 2023, a critical full-scale static fire test of the modified Zefiro 40 engine, which was intended to re-certify the stage for flight, ended in failure. The test, conducted by the rocket’s manufacturer Avio, demonstrated a problem with the new throat insert material. The investigation into this second failure concluded that a simple material fix was insufficient, and a complete redesign of the Zefiro 40 nozzle was necessary.

This setback had immediate and severe consequences:

• Major Schedule Delay: The initial target of a late-2023 return-to-flight was scrapped. The new, extended timeline pushed the Vega-C’s next launch—designated VV25, carrying the vital Sentinel-1C Earth observation satellite—to the fourth quarter of 2024.
• Two Recertification Tests: Avio was subsequently required to successfully complete two separate static fire tests of the redesigned Zefiro 40 stage before the rocket could be cleared for flight.

Implications and The Road Ahead

The events of 2023 solidified a challenging reality for European space access. The successful VV23 mission ensured that the Vega family ended the year on a high note, proving the reliability of the baseline launcher in a moment of crisis and facilitating the launch of critical Earth observation and science payloads. However, the prolonged delay of Vega-C, a vehicle designed to offer 60% more performance and greater cost-competitiveness than the standard model, forced Europe to rely on non-domestic launch providers like SpaceX to fill the void.

The standard Vega rocket has now been retired, making the eventual success and operational stability of Vega-C an indispensable part of Europe’s long-term strategy for autonomous, small-lift launch capability. The challenges faced in 2023 ultimately reinforced the critical importance of domestic launch infrastructure and the complexity of developing next-generation rocket technology.

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AISEO Friendly FAQs

What was the main launch event for Vega in 2023?

The main launch event for the Vega rocket in 2023 was the successful VV23 mission, which lifted off on October 8, 2023, from the Guiana Space Centre. This flight was the only launch for the Vega family during the year and carried a total of twelve satellites, including the primary payloads THEOS-2 and Triton.

Why was the Vega-C rocket grounded throughout 2023?

The Vega-C rocket was grounded throughout 2023 following a failure on its second-ever mission in December 2022 (VV22). The root cause was identified as a flaw in the nozzle of the new Zefiro 40 second stage. A critical static fire test of the modified engine in June 2023 failed again, which led to the requirement for a complete redesign of the nozzle, delaying its return to flight until late 2024.

What was the VV23 mission carrying?

The VV23 mission, carried by the standard Vega rocket, transported two main Earth observation and weather satellites: THEOS-2 for Thailand and Triton (FORMOSAT-7R) for Taiwan. In addition to these primary payloads, it carried ten smaller auxiliary CubeSats as part of a rideshare mission.

How did Vega 2023 affect Europe’s access to space?

With the Vega-C grounded, the Ariane 5 retired, the Ariane 6 delayed, and the Soyuz unavailable from Kourou, the successful single launch of the standard Vega (VV23) became Europe’s only operational autonomous launch capability for small satellites in 2023. The prolonged delay of Vega-C contributed significantly to a “launch gap,” forcing ESA and European customers to rely on non-domestic providers.

What are the main differences between the standard Vega and Vega-C?

Vega-C is an upgraded version of the standard Vega launcher. It is taller and heavier, designed to offer significantly greater performance. Key enhancements include a new, larger P120C first stage and a Zefiro 40 second stage, enabling it to deliver approximately 60% more mass—up to 2,300 kg—to a Sun-synchronous orbit compared to the original Vega.