| EchoStar XXI | |
| Mission Type: | Communication |
| Operator: | EchoStar Corporation |
| Cospar Id: | 2017-032A |
| Satcat: | 42749 |
| Mission Duration: | Planned: 15+ years Elapsed: |
| Spacecraft Bus: | SSL 1300 |
| Manufacturer: | Space Systems Loral |
| Launch Date: | UTC |
| Launch Rocket: | ILS Proton Breeze M |
| Launch Site: | Baikonur Cosmodrome |
| Launch Contractor: | International Launch Services |
| Orbit Epoch: | 22 July 2018, 15:03 UTC[1] |
| Orbit Reference: | Geocentric |
| Orbit Regime: | Geostationary |
| Orbit Periapsis: | 35784.4km (22,235.4miles) |
| Orbit Apoapsis: | 35801.8km (22,246.2miles) |
| Orbit Inclination: | 6.8 degrees |
| Orbit Period: | 23.93 hours |
| Orbit Longitude: | 10.25° East |
| Apsis: | gee |
| Trans Band: | S-band |
| Trans Coverage: | 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]