1945-1991: Cold War world Wiki
Ariel 1/Ariel/UK-1/S-55.
Category. Statistic.
Launch vehicle. Thor DM-19 Delta rocket.
Launch date. 26 April 1962, 18:00:16 UTC.
Launch site. Cape Canaveral LC-17A.
Ceased operations. July 9, 1962. It was destroyed in the Starfish Prime high-altitude nuclear test.
Owner(s). SERC/NASA.
Major contractor(s).  Goddard Space Flight Centre.
Is it still in orbit. Burnt up on 24 April 1976.
Launch mass. 62 kilograms (137 lb).
Nationality(s). British.
Satellite type. Ionospheric tests.
Links. http://en.wikipedia.org/wiki/Ariel_1.

The launch of Ariel 1 on-board of Thor Delta rocket on April 26th, 1962.