EchoStar XXI

Communications satellite

EchoStar XXI

Mission type| Communication
Operator| EchoStar Corporation
COSPAR ID| 2017-032A
SATCAT no.| 42749
Mission duration| Planned: 15+ years
Elapsed: 6 years, 9 months, 12 days
Spacecraft properties
Bus| SSL 1300
Manufacturer| Space Systems Loral
Launch mass| 6,871 kilograms (15,148 lb)
Start of mission
Launch date| 8 June 2017, 03:45 (2017-06-08UTC03:45Z) UTC
Rocket| ILS Proton Breeze M
Launch site| Baikonur Cosmodrome
Contractor| International Launch Services
Orbital parameters
Reference system| Geocentric
Regime| Geostationary
Longitude| 10.25° East
Perigee altitude| 35,784.4 kilometers (22,235.4 mi)
Apogee altitude| 35,801.8 kilometers (22,246.2 mi)
Inclination| 6.8 degrees
Period| 23.93 hours
Epoch| 22 July 2018, 15:03 UTC[1]
Transponders
Band| S-band
Coverage area| Europe

EchoStar XXI (formerly known as TerreStar 2[2]) is a European communications satellite which is operated by Echostar Corporation. It was constructed by Space Systems/Loral, based on the SSL 1300 satellite bus, and carries S band transponders which will be used to provide 2 GHz mobile connectivity throughout Europe.

EchoStar XXI was launched at 03:45 UTC on June 8, 2017[3] from the Baikonur Cosmodrome in Kazakhstan. This satellite was the heaviest commercial payload flown aboard a Russian booster at the time of its launch.[4]

Before being launched, the satellite was known as TerreStar-2, a ground spare for TerreStar Networks' satellite-terrestrial telephone network.[5]

## References[edit]

1. ^ "EchoStar XX1 Satellite details 2017-032A NORAD 42749". N2YO. 22 July 2018. Retrieved 22 July 2018.
2. ^ "Echostar 21". 8 June 2017. Retrieved 2018-07-22.
3. ^ "EchoStar XXI Satellite Successfully Launched". EchoStar Corporation. 2017-06-08. Retrieved 2018-07-22.
4. ^ "Video: Proton rocket returns to service with launch of EchoStar 21". Retrieved 2018-07-22.
5. ^ "TerreStar-2 in Final Payload Integration". 26 April 2010. Retrieved 2018-07-22.

## External links[edit]

* Spaceflight portal

* Echostar Corporation
* Launch video at Spaceflight Now
* NASA Spaceflight thread for EchoStar XXI Launch
* YouTube video (Russian language) of the rocket rolling to the pad

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July|

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September|

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October|

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Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).

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