IUS R/B(1)
| Launched | 17 October 1989 |
| Flight ended | 19 February 2006 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 20299 |
| COSPAR ID | 1989-084C |
| Observing |
IUS R/B(1)
| Launched | 17 October 1989 |
| Flight ended | 19 February 2006 |
| Status | Decayed |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 20299 |
| COSPAR ID | 1989-084C |
| Observing |