Explorer 5

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Explorer 5
Mission type Earth science
Operator Army Ballistic Missile Agency
Mission duration Failed to orbit
Spacecraft properties
Manufacturer Jet Propulsion Laboratory
Launch mass 16.86 kilograms (37.2 lb)
Start of mission
Launch date August 24, 1958, 06:17:22 (1958-08-24UTC06:17:22) UTC
Rocket Juno I
Launch site Cape Canaveral LC-5

Explorer 5 was a United States satellite with a mass of 17.24 kg.

It launched atop a Juno I rocket on August 24, 1958 from Launch Complex 5, 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]

Explorer 5 had been intended to be one of two satellites used to gather data for Project Argus.