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Intelsat II F-4 : ウィキペディア英語版 | Intelsat II F-4
Intelsat II F-4 was a communications satellite operated by Intelsat. Launched in 1967 it was operated in geostationary orbit at a longitude of 176 degrees east and later 166 degrees west. The fourth and last Intelsat II satellite to be launched, Intelsat II F-4 was built by Hughes Aircraft around the HS-303A satellite bus. It carried two transponders, which were powered by body-mounted solar cells generating 85 watts of power. The spacecraft had a mass of at launch, decreasing through expenditure of propellant to by the beginning of its operational life. Intelsat II F-4 was launched atop a Delta E1 rocket flying from Launch Complex 17B at the Cape Canaveral Air Force Station. The launch took place at 00:45:00 UTC on September 28, 1967, with the spacecraft entering a geosynchronous transfer orbit.〔 It fired an SVM-1 apogee motor to place itself into its operational geostationary orbit. The spacecraft was operated at a longitude of 176° east until 1970, before being moved to 166° west. In total the satellite remained in service for around three and a half years.〔 As of February 8, 2014 the derelict Intelsat II F-4 was in an orbit with a perigee of , an apogee of , inclination of 6.00 degrees and an orbital period of 23.95 hours.〔 ==References==
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