| Official name | COSMOS 1691 DEB |
| Alternative name | Cosmos-1691 fragmentation debris |
| Cospar ID | 1985-094U |
| Norad ID | 18565 |
| Launch date | 1985-10-09 |
| Launch site | PKMTR |
| Launch vehicle | Tsiklon-3 |
| RCS size | SMALL |
| Decay date | ON ORBIT |
| Period (min) | 105.76 |
| Inclination (deg) | 82.48 |
| Perigee (km) | 939 |
| Apogee (km) | 1121 |
| Eccentricity | 0.0883495145631068 |
| Mean motion (revs. per day) | 13.6157337367625 |
| Semi-Major axis (km) | 7408.135 |
| Raan (deg) | 71.2551 |
| Arg of perigee (deg) | 85.4368 |






