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Operator Telesat Canada
Spacecraft properties
Bus Eurostar-3000S
Manufacturer EADS Astrium
Start of mission
Launch date 18 September 2008, 21:47 (2008-09-18UTC21:47Z)
Rocket Proton-M/Briz-M
Launch site Baikonur 200/39
Contractor ILS
Orbital parameters
Reference system Geocentric
Regime Geostationary

Nimiq-4 is a Canadian geosynchronous communications satellite. It was launched aboard a Proton-M/Briz-M carrier rocket at 21:47 GMT on 19 September 2008. It was positioned at 82ºW longitude, and operated by Telesat Canada.

The satellite was constructed by EADS Astrium, using a Eurostar-3000S bus. It is powered by two solar arrays, with a span of 39 metres (128 ft), producing 12 kW of power. The launch mass of the satellite is 4.8 tonnes (4.7 long tons). It carries 40 transponders, 32 of which operate in the NATO J band (IEEE Ku band), and 8 which operate in the NATO K band (IEEE Ka band).

See also[edit]


  • Krebs, Gunter. "Nimiq 4". Gunter's Space Page. Retrieved 2008-09-10.