# Ariane 5G

> European launch vehicle

**Wikidata**: [Q16351696](https://www.wikidata.org/wiki/Q16351696)  
**Source**: https://4ort.xyz/entity/ariane-5g-q16351696

## Summary
Ariane 5G is a European launch vehicle and a specific rocket model within the retired Ariane 5 series. Operated by Arianespace, it served as a primary transport for a wide array of scientific, communication, and research satellites, including the SMART-1 lunar orbiter and the XMM-Newton observatory.

## Key Facts
- **Operator:** Arianespace
- **Classification:** Rocket model; subclass of the retired Ariane 5 series
- **Core Components:** Features two EAP P238 boosters, one EPC H158 stage, and one EPS L9.7 upper stage
- **Scientific Payloads:** Launched the SMART-1 Moon orbiter and the XMM-Newton space observatory
- **Earth Observation:** Deployed Envisat, a former Earth observation satellite for the European Space Agency (ESA)
- **Early Testing:** The third Ariane 5 flight carried the Atmospheric Reentry Demonstrator for suborbital testing
- **Research Missions:** Launched the Young Engineers' Satellite and instrumented dummy satellites MaqSat-H and MaqSat-B in 1997
- **Mission Failure:** The intended Cluster constellation of four ESA spacecraft was destroyed during a launch failure

## FAQs
### Q: What is the Ariane 5G?
A: The Ariane 5G is a European launch vehicle operated by Arianespace. It is a specific model within the retired Ariane 5 rocket family designed to carry heavy payloads into orbit.

### Q: What were the main components of the Ariane 5G rocket?
A: The vehicle's structure consisted of three primary stages: two EAP P238 boosters, an EPC H158 main stage, and an EPS L9.7 upper stage.

### Q: Which notable scientific missions did Ariane 5G launch?
A: Notable missions included the SMART-1 satellite, which orbited the Moon, the XMM-Newton space observatory, and the Envisat Earth observation satellite.

### Q: Did the Ariane 5G ever experience a launch failure?
A: Yes, a launch failure involving the Ariane 5G resulted in the destruction of the Cluster constellation, which was intended to be a group of four European Space Agency spacecraft.

## Why It Matters
Ariane 5G was a foundational component of the Ariane 5 program, representing a significant era in European space access. As a heavy-lift vehicle, it provided the European Space Agency and international partners with the capability to deploy complex scientific instruments and massive communication infrastructures. Its legacy includes the successful deployment of the SMART-1 mission, Europe's first mission to the Moon, and the XMM-Newton observatory, which advanced our understanding of the universe. Beyond science, the Ariane 5G was a workhorse for the telecommunications industry, launching numerous satellite series such as Eutelsat, INSAT, and BSAT. Its development and early flights, including the testing of the Atmospheric Reentry Demonstrator, were critical in refining the reliability and technical standards of the Ariane family before its eventual retirement.

## Notable For
- **Lunar Exploration:** Successfully launched the SMART-1 satellite, the European Space Agency's first mission to orbit the Moon.
- **Atmospheric Testing:** Conducted suborbital reentry testing using the Atmospheric Reentry Demonstrator during the third Ariane 5 flight.
- **Heavy-Lift Versatility:** Capable of deploying a diverse range of payloads, from amateur radio satellites like AO-40 to massive Earth observation platforms like Envisat.
- **International Utility:** Served as a global launch provider for countries including India (INSAT series), Japan (BSAT and N-STAR), and various commercial entities like Eutelsat and Intelsat.

## Body

### Technical Configuration
The Ariane 5G is a rocket model categorized as a subclass of the Ariane 5 family. Its architecture is defined by a specific set of components:
*   **Boosters:** Two EAP P238 units.
*   **Main Stage:** One EPC H158 stage.
*   **Upper Stage:** One EPS L9.7 stage.

### Scientific and Research Missions
The vehicle played a central role in European space science. In 1997, it launched the Young Engineers' Satellite alongside two instrumented dummy satellites, MaqSat-H and MaqSat-B, to facilitate research and testing. Major scientific deployments included:
*   **SMART-1:** An ESA satellite that successfully reached lunar orbit.
*   **XMM-Newton:** A sophisticated space observatory operated by the ESA.
*   **Envisat:** A large-scale Earth observation satellite.
*   **Artemis:** A decommissioned ESA communication satellite.

### Communication Satellite Deployment
Ariane 5G was a prolific launcher for the global telecommunications sector. It was responsible for placing numerous geostationary and communications satellites into orbit, including:
*   **Eutelsat Series:** Including 5 West A, 59A, 133 West A, and 33A.
*   **INSAT Series (India):** Including INSAT-3A, 3B, and 3E.
*   **BSAT Series (Japan):** Including BSAT 2A, 2C, and 2b.
*   **Other Commercial Payloads:** Astra 2D, Intelsat 1R, Galaxy 12, N-STAR c, Optus 1C, AsiaStar, and the AMC-7 and AMC-8 satellites.

### Flight History and Demonstrations
The third flight of the Ariane 5 series utilized the 5G model to carry the Atmospheric Reentry Demonstrator, a suborbital test vehicle. While the vehicle saw many successes, it was also the launch vehicle for the ill-fated Cluster mission, where a constellation of four ESA spacecraft was destroyed during a failure. Other specialized payloads included the AO-40 amateur radio satellite and the STRV 1C and 1D satellites.

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