SL-6 PLAT
| Launched | 21 March 1991 | 
| Flight ended | 27 March 1991 | 
| Status | Decayed | 
| Launch site | Plesetsk Missile and Space Complex, Russia | 
| Owner | Commonwealth of Independent States (former USSR) | 
| NORAD ID | 21198 | 
| COSPAR ID | 1991-022C | 
| Observing | 
SL-6 PLAT
| Launched | 21 March 1991 | 
| Flight ended | 27 March 1991 | 
| Status | Decayed | 
| Launch site | Plesetsk Missile and Space Complex, Russia | 
| Owner | Commonwealth of Independent States (former USSR) | 
| NORAD ID | 21198 | 
| COSPAR ID | 1991-022C | 
| Observing |