Spacecraft information: ACE
| Launched | 24 August 1997 |
| Flight ended | – |
| Status | Operational |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 24912 |
| COSPAR ID | 1997-045A |
| Alternative names |
ADVANCED COMPOSITION EXPLORER |
| Observing |
Launched alongside
DELTA 2 R/B