| Mission type | Communication |
|---|---|
| Operator | EchoStar Corporation |
| COSPAR ID | 2017-032A |
| SATCAT no. | 42749 |
| Mission duration | Planned: 15+ years Elapsed: 6 years, 8 months, 3 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 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]
