| Name of Satellite, Alternate Names | TerraStar 1 |
| Country of Operator/Owner | USA |
| Operator/Owner | TerraStar Corporation |
| Users | Commercial |
| Purpose | Communications |
| Class of Orbit | GEO |
| Type of Orbit | |
| Longitude of GEO (degrees) | -111 |
| Perigee (km) | 35783 |
| Apogee (km) | 35791 |
| Eccentricity | 9.48834120074958E-05 |
| Inclination (degrees) | 5.94 |
| Period (minutes) | 1436.11 |
| Launch Mass (kg.) | 6910 |
| Dry Mass (kg.) | |
| Power (watts) | |
| Date of Launch | 01-07-2009 |
| Expected Lifetime | 15 yrs. |
| Contractor | Space Systems/Loral |
| Country of Contractor | USA |
| Launch Site | Guiana Space Center |
| Launch Vehicle | Ariane 5 ECA |
| COSPAR Number | 2009-035A |
| NORAD Number | 35496 |
| Comments | Largest commercial satellite ever built; 18-meter-diameter unfurlable S-band antenna; provide mobile voice and data communications in North America to smartphone-size handsets. |