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The first stage was a Thor missile in the DM-21 configuration, and the second stage was the Delta D, which was derived from the earlier Delta. An Altair solid rocket motor was used as a third stage.
Missions
9
Success Rate
88.9%
Successes
8
Failures
1
Success Streak
0
Partial Failures
0
Active 1962 to 1964
Payload to Orbit
LEO: 375 kg
GTO: 68 kg
Stages
3