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Other Designations: Satellite Italiano Ricerca Industriale Orientata. Class: Technology. Type: Communications. Destination: Geosynchronous Orbit. Nation: Italy. Agency: CNR. SIRIO was a spin stabilized geostationary experimental communications satellite with a nominal life of two years. Characteristics of satellite: Weight at launch 398 kg, in orbit 218 kg. Configuration - cylindrical, height 1.981m, diameter 1.433m, Typical orbit: 35755 km x 35869 km at 10 degrees inclination. Mass: 220 kg (480 lb). Associated Launch Vehicle: Ariane 1, Delta 2000.
Sirio Chronology - 1977 August 25 - Sirio 1 - Launch Site: Cape Canaveral. Launch Vehicle: Delta. Mass: 220 kg (480 lb). Perigee: 35,755 km (22,217 mi). Apogee: 35,869 km (22,287 mi). Inclination: 9.60 deg. Period: 1,437.40 min.
Experimental commsat. SIRIO (Satellite Italiano Ricerca Industriale Orientata). Launch time 2350:00 GMT. Geographical longitude of geostationary orbit 15 deg W. SIRIO is a spin stabilized geostationary experimental communications satellite. Characteristics of satellite: Weight at launch 398 kg, in orbit 218 kg. Configuration - cylindrical, height 1.981m, diameter 1.433 m, nominal life two years. Positioned in geosynchronous orbit over the Atlantic Ocean at 15 deg W in 1977-1981; over the Atlantic Ocean 25 deg W in 1981-1983; over the Indian Ocean 65 deg E in 1983-1985 As of 4 September 2001 located at 86.65 deg E drifting at 0.265 deg E per day. As of 2007 Mar 11 located at 75.38E drifting at 0.003E degrees per day.
- 1982 September 9 - Sirio 2 - Program: MARECS. Launch Site: Kourou. Launch Vehicle: Ariane. FAILURE: Failure.
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© Mark Wade, 1997 - 2008 except where otherwise noted.
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