Telstar 402
Mission typeCommunication
COSPAR ID1994-058A
SATCAT no.23249
Mission duration12 years (planned)
Spacecraft properties
ManufacturerLockheed Martin
Launch mass3,485 kilograms (7,683 lb)
Dimensions4.08 m × 2.22 m × 2.54 m (13.4 ft × 7.3 ft × 8.3 ft)[1]
Power5000 W
Start of mission
Launch date16 December 1994, 00:29:44 (1994-12-16UTC00:29:44Z) UTC
RocketAriane-42L H10+
Launch siteKourou ELA-2
End of mission
Last contactSeptember 9, 1994
Decay dateNovember 14, 2004 (2004-11-15)
Orbital parameters
Reference systemGeocentric
RegimeGeostationary (planned)
Longitude89° W (planned)
Perigee altitude292 kilometres (181 mi)
Apogee altitude19,340 kilometres (12,020 mi)
Period341.8 minutes
EpochSeptember 9, 1994

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]


  1. ^ Telstar 402. TSE. Retrieved June 3, 2018.
  2. ^ Reed Business Information Ltd. "Gas leak led to Telstar 402 explosion". Flight Global. Retrieved June 3, 2018.