Thor DM-21 Ablestar | Transit-O 2 & 5E-5

Thor DM-21 Ablestar | Transit-O 2 & 5E-5

Space Launch Complex 2W
Vandenberg SFB, CA, USA













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United States Air Force

The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal Corps, the USAF was established as a separate branch of the United States Armed Forces in 1947 with the enactment of the National Security Act of 1947.


Transit-O 2 & 5E-5

The Transit-O series of satellites that closely followed the design of Transit 5C-1 were also called “Oscars” (Oscar is the phonetic alphabet for “O”, i. e., operational). They were also called NNS (Navy Navigation Satellite) or shortened NavSat.

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Thor DM-21 Ablestar

Height 29.00 Meters

Max Stages 2

Mass To GTO 0 kg

Liftoff Thrust 760 kN

Diameter 1.44 Meters

Mass To LEO 150 kg

Liftoff Mass 51 Tonnes

Launch Success 13

Consecutive Success 5

Maiden Flight 1960-04-13

Launch Failures 6

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