Orbital elements of COSMOS 1821
| Launched | 17 February 1987 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 17525 |
| 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 Nov 05 18:57 | 2025 Nov 02 12:23:28 | 82.9126 | 0.00360 | 22.4179 | 216.6258 | 297.8451 | 13.73925 | 5.743 |
| 2025 Nov 04 18:57 | 2025 Nov 02 12:23:28 | 82.9126 | 0.00360 | 22.4179 | 216.6258 | 297.8451 | 13.73925 | 5.743 |
| 2025 Nov 03 18:57 | 2025 Nov 02 12:23:28 | 82.9126 | 0.00360 | 22.4179 | 216.6258 | 297.8451 | 13.73925 | 5.743 |
| 2025 Nov 02 18:57 | 2025 Oct 29 12:19:03 | 82.9133 | 0.00358 | 22.6162 | 228.0487 | 297.8451 | 13.73925 | 5.743 |
| 2025 Nov 01 18:58 | 2025 Oct 29 12:19:03 | 82.9133 | 0.00358 | 22.6162 | 228.0487 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 31 18:57 | 2025 Oct 29 12:19:03 | 82.9133 | 0.00358 | 22.6162 | 228.0487 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 30 18:57 | 2025 Oct 29 12:19:03 | 82.9133 | 0.00358 | 22.6162 | 228.0487 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 29 18:57 | 2025 Oct 29 12:19:03 | 82.9133 | 0.00358 | 22.6162 | 228.0487 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 28 18:57 | 2025 Oct 23 16:15:38 | 82.9143 | 0.00356 | 22.9051 | 244.8362 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 27 18:57 | 2025 Oct 23 16:15:38 | 82.9143 | 0.00356 | 22.9051 | 244.8362 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 26 18:57 | 2025 Oct 23 16:15:38 | 82.9143 | 0.00356 | 22.9051 | 244.8362 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 25 17:57 | 2025 Oct 23 16:15:38 | 82.9143 | 0.00356 | 22.9051 | 244.8362 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 24 17:57 | 2025 Oct 23 16:15:38 | 82.9143 | 0.00356 | 22.9051 | 244.8362 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 22 17:56 | 2025 Oct 18 06:40:45 | 82.9154 | 0.00354 | 23.1723 | 260.3725 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 21 17:56 | 2025 Oct 18 06:40:45 | 82.9154 | 0.00354 | 23.1723 | 260.3725 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 20 17:56 | 2025 Oct 18 06:40:45 | 82.9154 | 0.00354 | 23.1723 | 260.3725 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 19 17:56 | 2025 Oct 18 06:40:45 | 82.9154 | 0.00354 | 23.1723 | 260.3725 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 18 17:56 | 2025 Oct 18 06:40:45 | 82.9154 | 0.00354 | 23.1723 | 260.3725 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 17 17:56 | 2025 Oct 07 11:43:39 | 82.9167 | 0.00355 | 23.7063 | 291.5705 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 16 17:56 | 2025 Oct 07 11:43:39 | 82.9167 | 0.00355 | 23.7063 | 291.5705 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 15 17:56 | 2025 Oct 07 11:43:39 | 82.9167 | 0.00355 | 23.7063 | 291.5705 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 14 17:56 | 2025 Oct 07 11:43:39 | 82.9167 | 0.00355 | 23.7063 | 291.5705 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 12 17:56 | 2025 Oct 07 11:43:39 | 82.9167 | 0.00355 | 23.7063 | 291.5705 | 297.8451 | 13.73925 | 5.743 |
| 2025 Oct 11 17:57 | 2025 Oct 07 11:43:39 | 82.9167 | 0.00355 | 23.7063 | 291.5705 | 297.8451 | 13.73925 | 5.743 |