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S 46 (Explorer 8).jpg
Explorer S-46A
Mission typeEarth science
Mission durationFailed to orbit
Spacecraft properties
ManufacturerJet Propulsion Laboratory
Launch mass15.70 kilograms (34.6 lb)
Start of mission
Launch dateMarch 23, 1958, 00:00 (1958-03-23) UTC
RocketJuno II
Launch siteCape Canaveral LC-26B
Orbital parameters
Reference systemGeocentric
RegimeMedium Earth

Explorer 5 was a United States satellite with a mass of 15.7 kg. It was the last of the original series of Explorers built, designed, and operated by the Jet Propulsion Laboratory[1].

It launched atop a Juno II rocket on March 23, 1960 from Launch Complex 26, but failed when the rocket's first stage collided with its second stage after separation, causing the upper stage firing angle to be off.



  1. ^ NASA GSFC, S-46. Retrieved 2018-06-07.