Sirius home
topic index
Program: Sirius. Objective: Communications. Overview: Geosynchronous communications satellite network.
Major Events:

  • 1997 November 12 - Sirius 2.  Spacecraft: Spacebus 3000. Launch Site: Kourou. Launch Vehicle: Ariane.

    Geosynchronous. Stationed over 4.8E Positioned in geosynchronous orbit at 5 deg E in 1997-1999 As of 5 September 2001 located at 4.81 deg E drifting at 0.001 deg E per day. As of 2007 Mar 8 located at 4.77E drifting at 0.004W degrees per day.

  • 1998 October 5 - Sirius 3.  Spacecraft: HS 376. Launch Site: Kourou. Launch Vehicle: Ariane.

    Geostationary at 23.5 degrees E. Positioned in geosynchronous orbit at 28 deg E in 1998-1999; 5 deg E in 2000.- As of 5 September 2001 located at 5.04 deg E drifting at 0.003 deg E per day. As of 2007 Mar 11 located at 4.97E drifting at 0.000W degrees per day.

  • 2007 November 17 - Sirius 4.  Spacecraft: AS 2100. Mass: 4,600 kg (10,100 lb). Launch Site: Baikonur. Launch Vehicle: Proton.

    Sirius 4 carried Ku-band and Ka-band communications payloads for Nordic, Baltic and East European communications. Three upper-stage burns placed Sirius 4 into a 6916 km x 35478 km x 17.4 deg geostationary transfer orbit. A series of maneuvers by the satellite using its own Leros engine maneuvered the satellite into geosynchronous orbit, stationed at 5 deg East.


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© Mark Wade, 1997 - 2008 except where otherwise noted.