Discoverer 4 - Space launch mission detailed information
Discoverer 4 4
25 JUN 1959
United States Air Force
Space Launch Complex 1E
Discoverer 4 was the fourth in a series of reconnaissance satellites, however, it failed to reach orbit when the Agena engine underperformed and failed to place the capsule into orbit.
Thor Agena A
Thor-Agena was a series of orbital launch vehicles. The rockets used Thor first stages and Agena second stages. They are thus cousins of the more-famous Thor-Deltas, which founded the Delta rocket family.