SBS 4
SBS 4 in the space
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| Mission type | Communications |
|---|---|
| Operator | SBS |
| COSPAR ID | 1984-093B |
| SATCAT no. | 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 UTC |
| Rocket | Space Shuttle Discovery STS-41D |
| Launch site | Kennedy LC-39A |
| Contractor | NASA |
| End of mission | |
| Disposal | Decommissioned |
| Deactivated | September 29, 2005 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 94° W |
| Eccentricity | 0.72775 |
| Perigee | 317 kilometres (197 mi) |
| Apogee | 36,137 kilometres (22,454 mi) |
| Inclination | 23° |
| Period | 640.2 minutes |
| Epoch | August 30, 1984 |
| Transponders | |
| Band | 14 Ku band |
SBS 4 was a geostationary communications satellite designed and manufactured by Hughes (now Boeing) on the HS-376 platform. It was ordered by Satellite Business Systems, which later sold it to Hughes Communications. It had a Ku band payload and operated on the 94°W longitude.
The spacecraft was designed and manufactured by Hughes on the HS-376 satellite bus. It had a launch mass of 1,117 kg (2,463 lb), a geostationary orbit and an 7-year design life.
On August 30, 1984, SBS 4 was finally launched by a Space Shuttle Discovery in the mission STS-41D from Kennedy Space Center at 12:41:50 UTC. The satellite was launched along with the satellites Telstar 302 and Leasat 2.
In 29 September 2005, SBS 4 finally decommissioned and put on a graveyard orbit.
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