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S 46 (Explorer 8).jpg
Explorer S-46A
Mission type Earth science
Operator NASA
Mission duration Failed to orbit
Spacecraft properties
Manufacturer Jet Propulsion Laboratory
Launch mass 15.70 kilograms (34.6 lb)
Start of mission
Launch date March 23, 1958, 00:00 (1958-03-23) UTC
Rocket Juno II
Launch site Cape Canaveral LC-26B
Orbital parameters
Reference system Geocentric
Regime Medium Earth
Epoch Planned

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.