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 Jul 04 17:56 | 2025 Jul 03 11:08:54 | 82.9120 | 0.00363 | 4.4602 | 196.0988 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jul 03 17:56 | 2025 Jul 03 11:08:54 | 82.9120 | 0.00363 | 4.4602 | 196.0988 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jul 02 17:56 | 2025 Jun 28 15:16:36 | 82.9123 | 0.00360 | 4.6993 | 209.7558 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jul 01 17:56 | 2025 Jun 28 15:16:36 | 82.9123 | 0.00360 | 4.6993 | 209.7558 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 30 17:56 | 2025 Jun 28 15:16:36 | 82.9123 | 0.00360 | 4.6993 | 209.7558 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 29 17:56 | 2025 Jun 28 15:16:36 | 82.9123 | 0.00360 | 4.6993 | 209.7558 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 28 17:56 | 2025 Jun 28 15:16:36 | 82.9123 | 0.00360 | 4.6993 | 209.7558 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 27 17:56 | 2025 Jun 23 04:36:49 | 82.9128 | 0.00357 | 4.9688 | 225.2752 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 26 17:56 | 2025 Jun 23 04:36:49 | 82.9128 | 0.00357 | 4.9688 | 225.2752 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 25 17:56 | 2025 Jun 23 04:36:49 | 82.9128 | 0.00357 | 4.9688 | 225.2752 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 24 17:56 | 2025 Jun 23 04:36:49 | 82.9128 | 0.00357 | 4.9688 | 225.2752 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 23 17:56 | 2025 Jun 23 04:36:49 | 82.9128 | 0.00357 | 4.9688 | 225.2752 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 22 17:56 | 2025 Jun 17 12:22:35 | 82.9128 | 0.00355 | 5.2498 | 241.6149 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 21 17:56 | 2025 Jun 17 12:22:35 | 82.9128 | 0.00355 | 5.2498 | 241.6149 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 20 17:57 | 2025 Jun 17 12:22:35 | 82.9128 | 0.00355 | 5.2498 | 241.6149 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 19 17:56 | 2025 Jun 17 12:22:35 | 82.9128 | 0.00355 | 5.2498 | 241.6149 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 18 17:56 | 2025 Jun 17 12:22:35 | 82.9128 | 0.00355 | 5.2498 | 241.6149 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 17 17:56 | 2025 Jun 17 12:22:35 | 82.9128 | 0.00355 | 5.2498 | 241.6149 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 16 17:56 | 2025 Jun 12 13:31:43 | 82.9129 | 0.00354 | 5.4950 | 255.8947 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 15 17:56 | 2025 Jun 12 13:31:43 | 82.9129 | 0.00354 | 5.4950 | 255.8947 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 14 17:56 | 2025 Jun 12 13:31:43 | 82.9129 | 0.00354 | 5.4950 | 255.8947 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 13 17:56 | 2025 Jun 12 13:31:43 | 82.9129 | 0.00354 | 5.4950 | 255.8947 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 12 17:56 | 2025 Jun 12 13:31:43 | 82.9129 | 0.00354 | 5.4950 | 255.8947 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 11 17:56 | 2025 Jun 05 18:25:32 | 82.9127 | 0.00354 | 5.8314 | 275.5734 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 10 17:56 | 2025 Jun 05 18:25:32 | 82.9127 | 0.00354 | 5.8314 | 275.5734 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 09 17:56 | 2025 Jun 05 18:25:32 | 82.9127 | 0.00354 | 5.8314 | 275.5734 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 08 17:56 | 2025 Jun 05 18:25:32 | 82.9127 | 0.00354 | 5.8314 | 275.5734 | 337.2543 | 13.73913 | 5.743 |
| 2025 Jun 07 17:56 | 2025 Jun 05 18:25:32 | 82.9127 | 0.00354 | 5.8314 | 275.5734 | 337.2543 | 13.73913 | 5.743 |