| Telstar 402 | |
| Mission Type: | Communication |
| Operator: | AT&T |
| Cospar Id: | 1994-058A |
| Satcat: | 23249 |
| Mission Duration: | 12 years (planned) |
| Spacecraft Bus: | AS-7000 |
| Manufacturer: | Lockheed Martin |
| Dimensions: | 4.08x[1] |
| Power: | 5000 W |
| Launch Date: | UTC |
| Launch Rocket: | Ariane-42L H10+ |
| Launch Site: | Kourou ELA-2 |
| Last Contact: | September 9, 2004 |
| Orbit Epoch: | September 9, 1994 |
| Orbit Reference: | Geocentric |
| Orbit Periapsis: | 292km (181miles) |
| Orbit Apoapsis: | 19340km (12,020miles) |
| Orbit Inclination: | 7.1° |
| Orbit Period: | 341.8 minutes |
| Orbit Longitude: | 89° W |
| Apsis: | gee |
| Programme: | Telstar |
| Previous Mission: | Telstar 303 |
| Next Mission: | Telstar 4 |
Telstar 402 was a communications satellite owned by AT&T Corporation.
Telstar 402 was successfully launched into space on September 9, 1994, by means of an Ariane-42L vehicle from the Kourou Space Center, French Guiana. It had a launch mass of 3,775 kg. The satellite was lost shortly after launch due to an explosion that occurred in the propulsion system that was caused by leakage of hot gases.[2]