Delta (rocket family)
| Delta Family | |
|---|---|
| Delta II through Delta IV | |
| General information | |
| Type | Expendable launch system |
| Manufacturer |
|
| Status | Out of service |
| History | |
| Introduction date | 13 May 1960 (Echo 1) |
| First flight | May 13, 1960 |
| Retired | 9 April 2024 (NROL-70) |
The Delta rocket family was a versatile range of American rocket-powered expendable launch systems that provided space launch capability in the United States from 1960 to 2024. Japan also launched license-built derivatives (N-I, N-II, and H-I) from 1975 to 1992. More than 300 Delta rockets were launched with a 95% success rate. The series was phased out in favor of the Vulcan Centaur, with the Delta IV Heavy rocket's last launch occurring on April 9, 2024.