| Official name | SL-8 DEB |
| Alternative name | Cosmos-3M fragmentation debris |
| Cospar ID | 1991-009AQ |
| Norad ID | 21177 |
| Launch date | 1991-02-12 |
| Launch site | PKMTR |
| Launch vehicle | Kosmos-3M |
| RCS size | MEDIUM |
| Decay date | ON ORBIT |
| Period (min) | 118.66 |
| Inclination (deg) | 74.11 |
| Perigee (km) | 1504 |
| Apogee (km) | 1738 |
| Eccentricity | 0.0721776681061073 |
| Mean motion (revs. per day) | 12.1355132310804 |
| Semi-Major axis (km) | 7999.135 |
| Raan (deg) | 281.1335 |
| Arg of perigee (deg) | 33.3289 |
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