Orbital elements of SL-8 DEB
| Launched | 11 February 1991 | 
| Flight ended | – | 
| Launch site | Plesetsk Missile and Space Complex, Russia | 
| Owner | Commonwealth of Independent States (former USSR) | 
| NORAD ID | 21137 | 
| Date fetched | Epoch osculation | Inc. [°] | Ecc. | RA asc node [hr] | Arg Peri. [°] | Mean anom [°] | Mean motion [rev/day] | Abs. mag | 
| Date fetched | Epoch osculation | Inc. [°] | Ecc. | RA asc node [hr] | Arg Peri. [°] | Mean anom [°] | Mean motion [rev/day] | Abs. mag | 
| 2025 Oct 30 18:57 | 2025 Oct 29 01:57:44 | 74.0444 | 0.01516 | 11.9008 | 313.0553 | 157.0176 | 12.18045 | – | 
| 2025 Oct 29 18:57 | 2025 Oct 29 01:57:44 | 74.0444 | 0.01516 | 11.9008 | 313.0553 | 157.0176 | 12.18045 | – | 
| 2025 Oct 28 18:57 | 2025 Oct 23 15:20:40 | 74.0452 | 0.01516 | 12.3544 | 320.7418 | 157.0176 | 12.18045 | – | 
| 2025 Oct 27 18:57 | 2025 Oct 23 15:20:40 | 74.0452 | 0.01516 | 12.3544 | 320.7418 | 157.0176 | 12.18045 | – | 
| 2025 Oct 26 18:57 | 2025 Oct 23 15:20:40 | 74.0452 | 0.01516 | 12.3544 | 320.7418 | 157.0176 | 12.18045 | – | 
| 2025 Oct 25 17:57 | 2025 Oct 23 15:20:40 | 74.0452 | 0.01516 | 12.3544 | 320.7418 | 157.0176 | 12.18045 | – | 
| 2025 Oct 24 17:57 | 2025 Oct 23 15:20:40 | 74.0452 | 0.01516 | 12.3544 | 320.7418 | 157.0176 | 12.18045 | – | 
| 2025 Oct 22 17:56 | 2025 Oct 18 04:03:57 | 74.0456 | 0.01515 | 12.8103 | 328.4609 | 157.0176 | 12.18045 | – | 
| 2025 Oct 21 17:56 | 2025 Oct 18 04:03:57 | 74.0456 | 0.01515 | 12.8103 | 328.4609 | 157.0176 | 12.18045 | – | 
| 2025 Oct 20 17:56 | 2025 Oct 18 04:03:57 | 74.0456 | 0.01515 | 12.8103 | 328.4609 | 157.0176 | 12.18045 | – | 
| 2025 Oct 19 17:56 | 2025 Oct 18 04:03:57 | 74.0456 | 0.01515 | 12.8103 | 328.4609 | 157.0176 | 12.18045 | – | 
| 2025 Oct 18 17:56 | 2025 Oct 18 04:03:57 | 74.0456 | 0.01515 | 12.8103 | 328.4609 | 157.0176 | 12.18045 | – | 
| 2025 Oct 17 17:56 | 2025 Oct 07 05:54:41 | 74.0453 | 0.01514 | 13.7207 | 343.8964 | 157.0176 | 12.18045 | – | 
| 2025 Oct 16 17:56 | 2025 Oct 07 05:54:41 | 74.0453 | 0.01514 | 13.7207 | 343.8964 | 157.0176 | 12.18045 | – | 
| 2025 Oct 15 17:56 | 2025 Oct 07 05:54:41 | 74.0453 | 0.01514 | 13.7207 | 343.8964 | 157.0176 | 12.18045 | – | 
| 2025 Oct 14 17:56 | 2025 Oct 07 05:54:41 | 74.0453 | 0.01514 | 13.7207 | 343.8964 | 157.0176 | 12.18045 | – | 
| 2025 Oct 12 17:56 | 2025 Oct 07 05:54:41 | 74.0453 | 0.01514 | 13.7207 | 343.8964 | 157.0176 | 12.18045 | – | 
| 2025 Oct 11 17:57 | 2025 Oct 07 05:54:41 | 74.0453 | 0.01514 | 13.7207 | 343.8964 | 157.0176 | 12.18045 | – | 
| 2025 Oct 09 17:56 | 2025 Oct 07 05:54:41 | 74.0453 | 0.01514 | 13.7207 | 343.8964 | 157.0176 | 12.18045 | – | 
| 2025 Oct 08 17:56 | 2025 Oct 07 05:54:41 | 74.0453 | 0.01514 | 13.7207 | 343.8964 | 157.0176 | 12.18045 | – | 
| 2025 Oct 07 17:56 | 2025 Oct 07 05:54:41 | 74.0453 | 0.01514 | 13.7207 | 343.8964 | 157.0176 | 12.18045 | – | 
| 2025 Oct 05 17:56 | 2025 Sep 24 23:44:44 | 74.0435 | 0.01512 | 14.7424 | 1.2159 | 157.0176 | 12.18045 | – | 
| 2025 Oct 04 17:57 | 2025 Sep 24 23:44:44 | 74.0435 | 0.01512 | 14.7424 | 1.2159 | 157.0176 | 12.18045 | – | 
| 2025 Oct 03 17:57 | 2025 Sep 24 23:44:44 | 74.0435 | 0.01512 | 14.7424 | 1.2159 | 157.0176 | 12.18045 | – |