Engineering:SBS 4
 SBS 4 in the space | |
| Mission type | Communications |
|---|---|
| Operator | SBS |
| COSPAR ID | 1984-093B[1] |
| 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[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 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 at 94°W longitude.[3]
Satellite description
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 a 7-year design life.[4]
History
On August 30, 1984, SBS 4 was launched by 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.
On 29 September 2005, SBS 4 was finally decommissioned and put into a graveyard orbit.[3]
References
- ↑ "SBS 4". NASA Space Science Data Coordinated Archive. https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1984-093B.
- ↑ "SBS 4". n2yo.com. http://www.n2yo.com/?s=15235.
- ↑ 3.0 3.1 Krebs, Gunter Dirk. "SBS 1, 2, 3, 4, 5 / HGS 5 - Gunter's Space Page". http://space.skyrocket.de/doc_sdat/sbs-1.htm.
- ↑ "SBS 4". NASA Space Science Data Coordinated Archive. https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1984-093B.
See also
- 1984 in spaceflight
 |  |
