Delta DM-19 | Explorer 10
Successful Launch
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March 25, 1961, 3:17 p.m.
Instantaneous launch window.
Instantaneous launch window.
The Delta DM-19, or Thor-Delta was an early launch system used for 12 launches in the early '60s in the US. The first stage was a Thor missile with the second stage being the Delta, hence the name Thor-Delta. Of 12 flights, it failed only once and put 11 satellites into orbit between 1960 and 62.
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