45th anniversary of first Proton launch
Submit on Monday, July 19th, 2010 22:55
Proton on 16 July celebrated the 45th anniversary of its first flight. Originally named UR-500, the rocket later took on the name Proton in homage of its first three payloads. Its first payload, the satellite “Proton-1,” has a mass of over twelve tons and was inserted into orbit at 589 km apogee, 183 km perigee, and an inclination of 63.4 degrees.
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