# EchoStar 105/SES-11

> communications satellite

**Wikidata**: [Q41975718](https://www.wikidata.org/wiki/Q41975718)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/SES-11)  
**Source**: https://4ort.xyz/entity/echostar-105-ses-11

## Summary
EchoStar 105/SES-11 is a geostationary communications satellite launched on October 11, 2017, by SpaceX using a Falcon 9 Full Thrust rocket. It was built by Airbus Defence and Space and operated jointly by EchoStar and SES S.A. The satellite replaced two older satellites, AMC-15 and AMC-18, and featured a launch mass of 5,200 kilograms.

## Key Facts
- **Class**: Communications satellite and geostationary satellite
- **Launch Date**: October 11, 2017, at 22:53 UTC from Kennedy Space Center Launch Complex 39A
- **Launch Vehicle**: Falcon 9 Full Thrust (Booster B1031.2)
- **Manufacturer**: Airbus Defence and Space
- **Spacecraft Bus**: Eurostar E3000
- **Launch Mass**: 5,200 kilograms
- **Operators**: EchoStar and SES S.A.
- **Replaced Satellites**: AMC-15 and AMC-18
- **Power System**: Two spacecraft solar arrays, each with 12 kilowatts of power
- **Country of Origin**: Luxembourg and the United States
- **COSPAR ID**: 2017-063A
- **NSSDCA ID**: 2017-063A

## FAQs
### Q: What was the purpose of the EchoStar 105/SES-11 satellite?
A: The satellite was designed to provide telecommunications services, replacing the older AMC-15 and AMC-18 satellites. It was operated jointly by EchoStar and SES S.A.

### Q: Who built the EchoStar 105/SES-11 satellite?
A: The satellite was built by Airbus Defence and Space, using the Eurostar E3000 spacecraft bus.

### Q: What launch vehicle was used to deploy EchoStar 105/SES-11?
A: The satellite was launched on a Falcon 9 Full Thrust rocket, specifically Booster B1031.2, on October 11, 2017.

### Q: How much did the EchoStar 105/SES-11 satellite weigh at launch?
A: The satellite had a launch mass of 5,200 kilograms.

### Q: Which satellites did EchoStar 105/SES-11 replace?
A: The satellite replaced AMC-15 and AMC-18, which were older communications satellites.

## Why It Matters
EchoStar 105/SES-11 played a crucial role in maintaining and upgrading global telecommunications infrastructure. As a geostationary satellite, it provided reliable communication services, particularly in North America, by replacing two aging satellites. Its launch marked a significant collaboration between SpaceX and Airbus Defence and Space, demonstrating the growing role of commercial space companies in satellite deployment. The satellite’s high-power solar arrays and advanced design ensured robust performance, contributing to the expansion of broadband and multimedia services. Its operational lifespan and coverage area helped bridge the gap between older and newer satellite technologies, ensuring seamless connectivity for users worldwide.

## Notable For
- **Joint Operation**: Operated by both EchoStar and SES S.A., showcasing a unique partnership between two major satellite service providers.
- **Replacement of Aging Satellites**: Successfully replaced AMC-15 and AMC-18, extending the operational life of critical telecommunications infrastructure.
- **High-Power Design**: Equipped with two spacecraft solar arrays, each generating 12 kilowatts of power, ensuring strong signal strength and coverage.
- **Eurostar E3000 Bus**: Utilized Airbus Defence and Space’s Eurostar E3000 spacecraft bus, known for its reliability and performance in geostationary orbit.
- **Falcon 9 Launch**: Deployed by SpaceX’s Falcon 9 Full Thrust rocket, highlighting the growing use of commercial launch vehicles for satellite missions.

## Body
### Overview
EchoStar 105/SES-11 is a geostationary communications satellite designed to provide telecommunications services. It was launched on October 11, 2017, from Kennedy Space Center Launch Complex 39A using a Falcon 9 Full Thrust rocket. The satellite was built by Airbus Defence and Space and operated jointly by EchoStar and SES S.A.

### Technical Specifications
- **Mass**: The satellite had a launch mass of 5,200 kilograms.
- **Power System**: It featured two spacecraft solar arrays, each capable of generating 12 kilowatts of power.
- **Spacecraft Bus**: The satellite utilized the Eurostar E3000 spacecraft bus, which is known for its reliability and performance in geostationary orbit.
- **Orbit**: EchoStar 105/SES-11 operates in a geostationary orbit, providing continuous coverage over a specific region.

### Operational Details
- **Operators**: The satellite was operated by EchoStar and SES S.A., two leading providers of satellite communications services.
- **Replaced Satellites**: EchoStar 105/SES-11 replaced the older AMC-15 and AMC-18 satellites, extending the operational life of critical telecommunications infrastructure.
- **Launch Vehicle**: The satellite was deployed by SpaceX’s Falcon 9 Full Thrust rocket, specifically Booster B1031.2, demonstrating the growing role of commercial launch vehicles in satellite deployment.

### Significance
EchoStar 105/SES-11 played a crucial role in maintaining and upgrading global telecommunications infrastructure. Its high-power design and advanced spacecraft bus ensured robust performance, contributing to the expansion of broadband and multimedia services. The satellite’s operational lifespan and coverage area helped bridge the gap between older and newer satellite technologies, ensuring seamless connectivity for users worldwide. Its launch marked a significant collaboration between SpaceX and Airbus Defence and Space, showcasing the growing importance of commercial space companies in satellite deployment.

## References

1. [Source](https://space.skyrocket.de/doc_sdat/echostar-105-ses-11.htm)
2. Jonathan's Space Report