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STEP M4
Launch Details
| Launched | 21 October 1997 |
| Flight ended | 30 March 2001 |
| Status | Decayed |
| Launch site | Eastern Range Airspace |
| Owner | United States |
| NORAD ID | 25013 |
| COSPAR ID | 1997-063A |
| Observing |
Launched alongside
PEGASUS R/B