Telstar 402 was a communications satellite owned by AT&T Corporation.

Telstar 402

Mission type	Communication
Operator	AT&T
COSPAR ID	1994-058A
SATCAT no.	23249
Mission duration	12 years (planned)
Spacecraft properties
Bus	AS-7000
Manufacturer	Lockheed Martin
Launch mass	3,485 kilograms (7,683 lb)
Dimensions	4.08 m × 2.22 m × 2.54 m (13.4 ft × 7.3 ft × 8.3 ft)[1]
Power	5000 W
Start of mission
Launch date	16 December 1994, 00:29:44 (1994-12-16UTC00:29:44Z) UTC
Rocket	Ariane-42L H10+
Launch site	Kourou ELA-2
End of mission
Last contact	September 9, 1994
Decay date	November 14, 2004 (2004-11-15)
Orbital parameters
Reference system	Geocentric
Regime	Geostationary (planned)
Longitude	89° W (planned)
Perigee altitude	292 kilometres (181 mi)
Apogee altitude	19,340 kilometres (12,020 mi)
Inclination	7.1°
Period	341.8 minutes
Epoch	September 9, 1994
Telstar ← Telstar 303 Telstar 4 →

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]