Encyclopedia Astronautica
Sirius


Geosynchronous communications satellite network.

More... - Chronology...


Associated Countries
Associated Spacecraft
  • HS 376 American communications satellite. 56 launches, 1980.11.15 (SBS 1) to 2003.09.27 (E-Bird). Mass 654 kg at beginning-of-life in geosynchronous orbit. Spin stabilized at 50 rpm by 4 hydrazine thrusters with 136 kg propellant. More...
  • FS-1300 American communications satellite bus. Operational, first launch 1989.06.05. More...
  • AS 2100 American communications satellite. Operational, first launch 1996.09.08 (GE 1). Cost per satellite $100 million for the spacecraft including ground support equipment, but not including launch costs. 3-axis stabilized. More...

Associated Launch Vehicles
  • Ariane 44L French orbital launch vehicle. Ariane 4 with 4 liquid rocket strap-ons. More...
  • Proton-K/DM-2M This four stage version uses the Block DM-2M / 11S861-01 upper stage, which has its own self-contained guidance unit. This reduces payload but does not require the spacecraft's guidance system to provide steering commands to booster. Used for launches of Russian geosynchronous satellites from 1994 on. More...
  • Proton/Briz M Improved Proton orbital launch vehicle. Improvements in lower stages to reduce structural mass, increase thrust, and fully utilize propellants (reducing release of toxic chemicals in stage impact areas). Briz M storable propellant upper stage replaces Block D cyrogenic stage. More...

Associated Manufacturers and Agencies
  • NSAB Swedish agency. Nordiska Satellit AB, Stockholm, Sweden. More...
  • Cannes French manufacturer of spacecraft. Cannes, France. More...
  • Palo Alto American manufacturer of rockets. Palo Alto, Palo Alto, California, USA. More...
  • Lockheed American manufacturer of rockets, spacecraft, and rocket engines. Lockheed Martin, Sunnyvale, CA, USA. More...

Associated Launch Sites
  • Baikonur Russia's largest cosmodrome, the only one used for manned launches and with facilities for the larger Proton, N1, and Energia launch vehicles. The spaceport ended up on foreign soil after the break-up of Soviet Union. The official designations NIIP-5 and GIK-5 are used in official Soviet histories. It was also universally referred to as Tyuratam by both Soviet military staff and engineers, and the US intelligence agencies. Since the dissolution of the Soviet Union the Russian Federation has insisted on continued use of the old Soviet 'public' name of Baikonur. In its Kazakh (Kazak) version this is rendered Baykonur. More...
  • Kourou After the agreement with newly independent Algeria for France to evacuate their launch sites in that country, a location near Biscarosse was selected for French missile testing. However since only launches westwards across the Bay of Biscay could be made from this site, it was unsuitable for France's Diamant orbital launch vehicle. After reviewing 14 potential sites, a location in the South American French colony of Guiana was selected. This would allow over-water launches to a tremendous range of possible orbital inclinations -- from -100.5 deg to 1.5 deg. Being near the equator, it would provide the maximum assist from the earth's rotation for launches into equatorial orbits. The decision was formalized in April 1964 and in July 1966 ELDO chose the site for future launches of the Europa II launch vehicle. More...

Sirius Chronology


1997 November 12 - . 21:48 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 44L. LV Configuration: Ariane 44L-3 V102.
  • Sirius 2 - . Nation: Sweden. Agency: NSAB. Manufacturer: Cannes. Program: Sirius. Class: Communications. Type: Civilian communications satellite. Spacecraft: Spacebus 3000. USAF Sat Cat: 25049 . COSPAR: 1997-071A. Apogee: 35,791 km (22,239 mi). Perigee: 35,781 km (22,233 mi). Inclination: 0.1000 deg. Period: 1,436.10 min. Summary: 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 - . 22:51 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 44L. LV Configuration: Ariane 44L V111.
  • Sirius 3 - . Payload: Sirius 3. Nation: Sweden. Agency: NSAB. Manufacturer: El Segundo. Program: Sirius. Class: Communications. Type: Civilian communications satellite. Spacecraft: HS 376. USAF Sat Cat: 25492 . COSPAR: 1998-056B. Apogee: 35,790 km (22,230 mi). Perigee: 35,782 km (22,233 mi). Inclination: 0.1000 deg. Period: 1,436.10 min. 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.

2000 June 30 - . 22:08 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC81/24. LV Family: Proton. Launch Vehicle: Proton-K/DM-2M. LV Configuration: Proton-K/DM-2M (DM3) 400-01.
  • Sirius 1 - . Payload: CD Radio 1. Mass: 3,800 kg (8,300 lb). Nation: USA. Agency: Sirius. Manufacturer: Palo Alto. Program: Sirius. Class: Communications. Type: Civilian communications satellite. Spacecraft: FS-1300. USAF Sat Cat: 26390 . COSPAR: 2000-035A. Apogee: 47,107 km (29,270 mi). Perigee: 24,465 km (15,201 mi). Inclination: 63.4000 deg. Period: 1,436.10 min. Digital Audio Radio Satellite, used for transmission of S-band radio broadcasts direct to receivers in cars in the United States. Sirius 1 was inserted into an initial 6,166 x 47110 km x 63.4 deg transfer orbit by the Proton-K's Blok DM3 upper stage. The satellite's R4D liquid apogee engine made several burns to raise the orbit to 24,388 x 47,097 km x 63.3 deg by July 8. This elliptical, inclined 24 hour orbit had a 24 hour period, designed to keep the satellite between longitude 60W and 140W, with apogee over the northern hemisphere. Stationed at 66 deg W. Positioned in geosynchronous orbit at 66 deg W in 2000. As of 6 September 2001 located at 65.59 deg W drifting at 0.015 deg E per day. As of 2007 Mar 9 located at 65.37W drifting at 0.004E degrees per day.

2000 September 5 - . 09:43 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC81/23. LV Family: Proton. Launch Vehicle: Proton-K/DM-2M. LV Configuration: Proton-K/DM-2M (DM3) 400-02.
  • Sirius 2 - . Mass: 3,800 kg (8,300 lb). Nation: USA. Agency: Sirius. Manufacturer: Palo Alto. Program: Sirius. Class: Communications. Type: Civilian communications satellite. Spacecraft: FS-1300. USAF Sat Cat: 26483 . COSPAR: 2000-051A. Apogee: 47,090 km (29,260 mi). Perigee: 24,480 km (15,210 mi). Inclination: 63.9000 deg. Period: 1,436.00 min. Sirius Radio's Sirius 2 was launched into a 144 x 168 km x 64.8 deg parking orbit. The Blok DM3 stage then made two burns to deliver Sirius 2 to an elliptical 6192 x 47057 km x 63.4 deg orbit. The was to provide digital radio broadcasts to mobile users in North America. Stationed at 64 deg W. As of 31 August 2001 located at 64.56 deg W drifting at 0.003 deg W per day. As of 2007 Mar 10 located at 67.77W drifting at 0.049E degrees per day.

2000 November 30 - . Launch Site: Baikonur. Launch Complex: Baikonur LC81/23. LV Family: Proton. Launch Vehicle: Proton-K/DM-2M. LV Configuration: Proton-K/DM-2M (DM3) 402-02.
  • Sirius CD Radio 3 - . Payload: CD Radio 3. Mass: 3,800 kg (8,300 lb). Nation: USA. Agency: Sirius. Manufacturer: Palo Alto. Program: Sirius. Class: Communications. Type: Civilian communications satellite. Spacecraft: FS-1300. USAF Sat Cat: 26626 . COSPAR: 2000-077A. Apogee: 47,084 km (29,256 mi). Perigee: 24,485 km (15,214 mi). Inclination: 64.2000 deg. Period: 1,436.00 min. Direct Radio Broadcasting satellite. Launch delayed from early October due to delays in delivery of engines. Stationed at 66 deg W. The third Sirius digital radio broadcast satellite was a Loral FS-1300 series vehicle and was placed in an initial elliptical 63 degree orbit by the Proton upper stage. Positioned in geosynchronous orbit at 66 deg W in 2000. As of 30 August 2001 located at 64.69 deg W drifting at 0.027 deg E per day. As of 2007 Mar 10 located at 65.64W drifting at 0.010E degrees per day.

2007 November 17 - . 22:39 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC200/39. LV Family: Proton. Launch Vehicle: Proton/Briz M.
  • Sirius 4 - . Payload: A2100AX. Mass: 4,600 kg (10,100 lb). Nation: Sweden. Agency: ILS. Manufacturer: Lockheed. Program: Sirius. Class: Communications. Type: Civilian communications satellite. Spacecraft: AS 2100. USAF Sat Cat: 32299 . COSPAR: 2007-057A. Apogee: 35,780 km (22,230 mi). Perigee: 35,641 km (22,146 mi). Inclination: 0.0000 deg. Period: 1,432.20 min. 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.

2009 June 30 - . 19:10 GMT - . Launch Site: Baikonur. LV Family: Proton. Launch Vehicle: Proton/Briz M. LV Configuration: Proton/Briz M s/n P346.
  • Sirius FM-5 - . Mass: 5,976 kg (13,174 lb). Nation: USA. Agency: ILS. Program: Sirius. Spacecraft: FS-1300. USAF Sat Cat: 35493 . COSPAR: 2009-034A. Apogee: 35,795 km (22,241 mi). Perigee: 35,779 km (22,231 mi). Inclination: 0.0000 deg. Period: 1,436.10 min. Summary: Direct radio broadcast satellite for North America. 2900 kg dry mass..

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