Sirius 4

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Vehicle: Proton M/ Breeze M.

The Satellite

  • Satellite Operator: SES SIRIUS
  • Satellite Manufacturer: Lockheed Martin Commercial Space Systems
  • Purpose: Telecommunication Services
  • Platform: A2100 AX
  • Separated Mass: 4385 kg
  • Satellite Design Life: 15 years


  • 4th ILS Proton Launch in 2007
  • 43rd ILS Proton Launch Overall
  • 10th Launch of A2100 Model

Latest News

ILS Proton Successfully Launches SIRIUS 4

Launch Resources

Final Details of the Launch and Separation

  • Liftoff occurred in Baikonur on Sunday November 18, at 4:39 a.m. local time (Nov. 17: 17:39 EST, 22:39 GMT)
  • Nominal separation took place on November 18, at 1:53 p.m. local time (02:53 EST, 07:53 GMT)
  • Separation of the SIRIUS-4 satellite occured approximately 9 hours, 13 minutes after liftoff.
  • Orbit Parameters: Predicted: 7030 km x 35,786 km x 17.3 deg

Contact Us!

For the latest news and information, or if you have a question, please email ILS at