|Mission type||Earth science|
|Operator||Army Ballistic Missile Agency|
|Mission duration||Failed to orbit|
|Manufacturer||Jet Propulsion Laboratory|
|Launch mass||16.86 kilograms (37.2 lb)|
|Start of mission|
|Launch date||August 24, 1958, 06:17:22UTC|
|Launch site||Cape Canaveral LC-5|
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.
Explorer 5 had been intended to be one of two satellites used to gather data for Project Argus.