# European Retrievable Carrier

> space observatory and research satellite

**Wikidata**: [Q49684](https://www.wikidata.org/wiki/Q49684)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/European_Retrievable_Carrier)  
**Source**: https://4ort.xyz/entity/european-retrievable-carrier

## Summary
The European Retrievable Carrier (EURECA) was a space observatory and research satellite launched by the European Space Agency in 1992. Designed for microgravity experiments and astronomical observations, it was deployed and later retrieved by NASA's Space Shuttle missions. EURECA marked a major collaborative effort in space-based science between European institutions and international partners.

## Key Facts
- Launched on July 31, 1992, aboard Space Shuttle Atlantis during mission STS-46.
- Recovered on July 1, 1993, by Space Shuttle Endeavour during mission STS-57.
- Mass at launch: 4,491 kilograms; dimensions: 4.6 m long, 2.6 m wide.
- Operated in low Earth orbit with an orbital period of 93.4 minutes and inclination of 28.5°.
- Funded by the Italian Space Agency and operated by the European Space Operations Centre and the Microgravity User Support Center.
- Equipped with two solar arrays generating up to 5,000 watts and four nickel–cadmium batteries.
- Carried out over 336 days of scientific operations before retrieval.

## FAQs
### Q: What was the European Retrievable Carrier used for?
A: The European Retrievable Carrier (EURECA) was used for conducting microgravity and astrophysics experiments in space. It served as both a research satellite and a space telescope, supporting multiple scientific investigations in low Earth orbit.

### Q: How was EURECA launched and retrieved?
A: EURECA was launched on July 31, 1992, by the Space Shuttle Atlantis (STS-46). It was later retrieved by the Space Shuttle Endeavour on July 1, 1993, during mission STS-57 after completing over 336 days of operation.

### Q: Who built and operated EURECA?
A: EURECA was manufactured by Entwicklungsring Nord and funded primarily by the Italian Space Agency. It was operated jointly by the European Space Operations Centre and the Microgravity User Support Center based in Germany.

## Why It Matters
The European Retrievable Carrier represented a key milestone in European-led space research and international cooperation in space exploration. As one of the first large-scale retrievable satellites, it enabled scientists to conduct long-term microgravity and astronomical experiments that were not feasible on Earth. Its successful deployment and recovery demonstrated Europe’s growing capabilities in space technology and set a precedent for future reusable space platforms. EURECA also contributed valuable data across disciplines including materials science, fluid dynamics, and astronomy, influencing follow-on missions and fostering collaboration within the global scientific community.

## Notable For
- First major ESA mission to combine retrievability with multi-disciplinary scientific payloads.
- Successful demonstration of long-duration microgravity experimentation in space.
- Unique dual role as both a research satellite and a deployable space telescope.
- Pioneering use of solar power and battery systems tailored for extended uncrewed missions.
- Symbol of early European autonomy and international collaboration in space science.

## Body
### Mission Overview
The European Retrievable Carrier (EURECA) was a recoverable satellite developed by the European Space Agency (ESA) for conducting scientific experiments in microgravity and space observation. It was launched into low Earth orbit on July 31, 1992, during NASA's STS-46 mission using the Space Shuttle Atlantis.

EURECA remained in orbit for approximately 336 days, performing autonomous scientific operations until its retrieval on July 1, 1993, by the Space Shuttle Endeavour during STS-57. During its mission, it orbited Earth more than 5,000 times, collecting critical data for various European and international researchers.

### Design and Specifications
- **Mass**: 4,491 kg (launch weight)
- **Dimensions**:
  - Length: 4.6 metres
  - Width: 2.6 metres
- **Power System**:
  - Two solar arrays producing up to 5,000 watts
  - Four nickel–cadmium batteries for energy storage
- **Orbit Characteristics**:
  - Periapsis: 438 km
  - Apoapsis: 447 km
  - Orbital Period: 93.4 minutes
  - Inclination: 28.5 degrees
  - Eccentricity: 0.00066

### Scientific Payloads and Objectives
EURECA hosted a suite of scientific instruments focused on:
- Materials sciences under microgravity conditions
- Fluid physics and fundamental processes in weightlessness
- Astrophysical observations via onboard telescopes
- Testing technologies for future space missions

Its modular design allowed for flexible payload configurations, enabling diverse experiments from multiple countries.

### Deployment and Recovery
- **Launch Date**: July 31, 1992
- **Deployment**: August 2, 1992
- **Start of Operations**: August 7, 1992
- **Recovery Mission**: STS-57 (Endeavour), June 24, 1993
- **Landing**: July 1, 1993

This sequence highlighted the precision required in deploying and retrieving such complex payloads, showcasing advancements in robotic arm handling and shuttle rendezvous techniques.

### Operators and Funding
- **Funder**: Italian Space Agency
- **Operators**:
  - European Space Operations Centre (ESOC)
  - Microgravity User Support Center (MUSC), Germany
- **Manufacturer**: Entwicklungsring Nord

These partnerships ensured cross-European involvement and sustained support throughout the mission lifecycle.

### Legacy and Impact
EURECA laid the groundwork for future ESA missions involving reusable platforms and advanced microgravity research. Its success validated concepts later applied in missions like the Columbus laboratory module and influenced the development of miniaturized experiment carriers. The program remains a benchmark example of international cooperation in space science and engineering.

## References

1. [Source](https://space.skyrocket.de/doc_sdat/eureca-1.htm)
2. [Source](https://www.eoportal.org/satellite-missions/eureca)
3. [Source](http://esapub.esrin.esa.it/br/br200/Eureca.pdf)
4. Virtual International Authority File
5. Jonathan's Space Report
6. Freebase Data Dumps. 2013
7. [Source](https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1992-049B)