USA 198
| Launched | 9 December 2007 |
| Flight ended | – |
| Status | Partially operational |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 32378 |
| COSPAR ID | 2007-060A |
| Alternative names |
NROL-24 |
| Observing |
Launched alongside
ATLAS 5 CENTAUR R/B