 SBS 4 in the space | |
| Mission type | Communications |
|---|---|
| Operator | SBS |
| COSPAR ID | 1984-093B[1] |
| SATCATno. | 15235 |
| Mission duration | 7 years design life |
| Spacecraft properties | |
| Bus | HS-376 |
| Manufacturer | Hughes Space and Communications |
| Launch mass | 1,117 kilograms (2,463 lb) |
| Start of mission | |
| Launch date | 30 August 1984, 12:41:50 (1984-08-30UTC12:41:50Z) UTC |
| Rocket | Space Shuttle DiscoverySTS-41D |
| Launch site | KennedyLC-39A |
| Contractor | NASA |
| End of mission | |
| Disposal | Decommissioned |
| Deactivated | September 29, 2005 (2005-09-30) |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 94° W[2] |
| Eccentricity | 0.72775 |
| Perigee altitude | 317 kilometres (197 mi) |
| Apogee altitude | 36,137 kilometres (22,454 mi) |
| Inclination | 23° |
| Period | 640.2 minutes |
| Epoch | August 30, 1984 |
| Transponders | |
| Band | 14 Ku band |
SBS 4 was ageostationarycommunications satellite designed and manufactured byHughes (nowBoeing) on theHS-376 platform. It was ordered bySatellite Business Systems, which later sold it toHughes Communications. It had aKu band payload and operated at 94°W longitude.[3]
The spacecraft was designed and manufactured byHughes on theHS-376satellite bus. It had a launch mass of 1,117 kg (2,463 lb), ageostationary orbit and a 7-year design life.[4]
On August 30, 1984, SBS 4 was launched bySpace Shuttle Discovery in the missionSTS-41D fromKennedy Space Center at 12:41:50 UTC. The satellite was launched along with the satellitesTelstar 302 andLeasat 2.
On 29 September 2005, SBS 4 was finally decommissioned and put into agraveyard orbit.[3]
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