Orbital elements of COSMOS 858
| Launched | 28 September 1976 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 9443 |
| 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 Dec 19 18:57 | 2025 Dec 12 03:41:59 | 74.0478 | 0.00148 | 9.3831 | 303.7290 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 18 18:57 | 2025 Dec 12 03:41:59 | 74.0478 | 0.00148 | 9.3831 | 303.7290 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 17 18:58 | 2025 Dec 12 03:41:59 | 74.0478 | 0.00148 | 9.3831 | 303.7290 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 16 18:57 | 2025 Dec 12 03:41:59 | 74.0478 | 0.00148 | 9.3831 | 303.7290 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 15 18:58 | 2025 Dec 12 03:41:59 | 74.0478 | 0.00148 | 9.3831 | 303.7290 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 14 18:56 | 2025 Dec 12 03:41:59 | 74.0478 | 0.00148 | 9.3831 | 303.7290 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 13 18:56 | 2025 Dec 12 03:41:59 | 74.0478 | 0.00148 | 9.3831 | 303.7290 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 12 18:57 | 2025 Dec 12 03:41:59 | 74.0478 | 0.00148 | 9.3831 | 303.7290 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 11 18:56 | 2025 Dec 07 04:54:40 | 74.0476 | 0.00146 | 9.9874 | 313.3936 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 10 18:56 | 2025 Dec 07 04:54:40 | 74.0476 | 0.00146 | 9.9874 | 313.3936 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 09 18:56 | 2025 Dec 07 04:54:40 | 74.0476 | 0.00146 | 9.9874 | 313.3936 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 08 18:56 | 2025 Dec 07 04:54:40 | 74.0476 | 0.00146 | 9.9874 | 313.3936 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 07 18:56 | 2025 Dec 07 04:54:40 | 74.0476 | 0.00146 | 9.9874 | 313.3936 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 06 18:56 | 2025 Dec 02 11:08:29 | 74.0471 | 0.00144 | 10.5662 | 322.7585 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 05 18:57 | 2025 Dec 02 11:08:29 | 74.0471 | 0.00144 | 10.5662 | 322.7585 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 04 18:57 | 2025 Dec 02 11:08:29 | 74.0471 | 0.00144 | 10.5662 | 322.7585 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 03 18:56 | 2025 Dec 02 11:08:29 | 74.0471 | 0.00144 | 10.5662 | 322.7585 | 56.2455 | 14.35059 | 6.243 |
| 2025 Dec 02 18:56 | 2025 Dec 02 11:08:29 | 74.0471 | 0.00144 | 10.5662 | 322.7585 | 56.2455 | 14.35059 | 6.243 |
| 2025 Nov 30 18:57 | 2025 Nov 25 00:07:16 | 74.0470 | 0.00141 | 11.4769 | 337.7322 | 56.2455 | 14.35059 | 6.243 |
| 2025 Nov 29 18:56 | 2025 Nov 25 00:07:16 | 74.0470 | 0.00141 | 11.4769 | 337.7322 | 56.2455 | 14.35059 | 6.243 |
| 2025 Nov 28 18:57 | 2025 Nov 25 00:07:16 | 74.0470 | 0.00141 | 11.4769 | 337.7322 | 56.2455 | 14.35059 | 6.243 |
| 2025 Nov 27 18:57 | 2025 Nov 25 00:07:16 | 74.0470 | 0.00141 | 11.4769 | 337.7322 | 56.2455 | 14.35059 | 6.243 |
| 2025 Nov 26 18:57 | 2025 Nov 25 00:07:16 | 74.0470 | 0.00141 | 11.4769 | 337.7322 | 56.2455 | 14.35059 | 6.243 |
| 2025 Nov 25 18:57 | 2025 Nov 25 00:07:16 | 74.0470 | 0.00141 | 11.4769 | 337.7322 | 56.2455 | 14.35059 | 6.243 |
| 2025 Nov 24 18:56 | 2025 Nov 20 01:19:55 | 74.0476 | 0.00140 | 12.0812 | 347.6519 | 56.2455 | 14.35059 | 6.243 |
| 2025 Nov 23 18:57 | 2025 Nov 20 01:19:55 | 74.0476 | 0.00140 | 12.0812 | 347.6519 | 56.2455 | 14.35059 | 6.243 |