# Pleiades 1

> 38012

**Wikidata**: [Q13989992](https://www.wikidata.org/wiki/Q13989992)  
**Source**: https://4ort.xyz/entity/pleiades-1

## Summary  
Pleiades 1 is an Earth observation satellite designed to monitor Earth from orbit. Launched on December 17, 2011, aboard a Soyuz-2.1a rocket, it is part of a high-resolution imaging satellite system. It is also known by aliases such as PLEIADES 1 and PHR1A.

## Key Facts  
- **Launch Date**: December 17, 2011 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Vehicle**: Soyuz-2.1a ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Site**: Ensemble de Lancement Soyouz ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **COSPAR ID**: 2011-076F ([reference](https://www.wikidata.org/wiki/Q728945))  
- **Class**: Earth observation satellite ([reference](https://www.wikidata.org/wiki/Q48183))  
- **Aliases**: PLEIADES 1, PHR1A  
- **Significant Event**: Rocket launch on December 17, 2011, from Ensemble de Lancement Soyouz ([reference](https://www.wikidata.org/wiki/Q6272367))  

## FAQs  
### Q: What is Pleiades 1 used for?  
A: Pleiades 1 is an Earth observation satellite designed to capture high-resolution images of Earth for applications like mapping, environmental monitoring, and defense.  

### Q: When was Pleiades 1 launched?  
A: Pleiades 1 was launched on December 17, 2011, aboard a Soyuz-2.1a rocket from Ensemble de Lancement Soyouz.  

### Q: What are the alternative names for Pleiades 1?  
A: Pleiades 1 is also known as PLEIADES 1 and PHR1A.  

## Why It Matters  
Pleiades 1 plays a critical role in Earth observation by providing high-resolution imagery for civilian and military applications. Its data supports urban planning, disaster response, environmental monitoring, and national security. The satellite's advanced imaging capabilities enable detailed analysis of Earth's surface, making it invaluable for scientific research and operational decision-making. As part of a broader satellite constellation, Pleiades 1 enhances global coverage and temporal resolution, ensuring timely and accurate data for users worldwide.  

## Notable For  
- **High-Resolution Imaging**: Provides detailed Earth observation data for diverse applications.  
- **Part of a Constellation**: Works alongside other satellites to improve coverage and revisit times.  
- **Versatile Use Cases**: Supports both civilian and military needs, including mapping and surveillance.  

## Body  
### Launch Details  
- **Date**: December 17, 2011  
- **Rocket**: Soyuz-2.1a  
- **Site**: Ensemble de Lancement Soyouz  

### Technical Specifications  
- **Class**: Earth observation satellite  
- **COSPAR ID**: 2011-076F  
- **Aliases**: PLEIADES 1, PHR1A  

### Mission Significance  
- **Primary Function**: High-resolution Earth imaging  
- **Applications**: Mapping, environmental monitoring, defense, and disaster response

## References

1. Jonathan's Space Report