Orbital elements of COSMOS 1721
| Launched | 8 January 1986 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 16454 |
| 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 07 18:56 | 2025 Dec 07 07:20:39 | 73.9890 | 0.00357 | 6.4151 | 137.9382 | 250.5017 | 12.52382 | – |
| 2025 Dec 06 18:56 | 2025 Dec 02 12:33:22 | 73.9883 | 0.00358 | 6.8418 | 145.2105 | 250.5017 | 12.52382 | – |
| 2025 Dec 05 18:57 | 2025 Dec 02 12:33:22 | 73.9883 | 0.00358 | 6.8418 | 145.2105 | 250.5017 | 12.52382 | – |
| 2025 Dec 04 18:57 | 2025 Dec 02 12:33:22 | 73.9883 | 0.00358 | 6.8418 | 145.2105 | 250.5017 | 12.52382 | – |
| 2025 Dec 03 18:56 | 2025 Dec 02 12:33:22 | 73.9883 | 0.00358 | 6.8418 | 145.2105 | 250.5017 | 12.52382 | – |
| 2025 Dec 02 18:56 | 2025 Dec 02 12:33:22 | 73.9883 | 0.00358 | 6.8418 | 145.2105 | 250.5017 | 12.52382 | – |
| 2025 Nov 30 18:57 | 2025 Nov 25 11:50:36 | 73.9870 | 0.00359 | 7.4689 | 155.8285 | 250.5017 | 12.52382 | – |
| 2025 Nov 29 18:56 | 2025 Nov 25 11:50:36 | 73.9870 | 0.00359 | 7.4689 | 155.8285 | 250.5017 | 12.52382 | – |
| 2025 Nov 28 18:57 | 2025 Nov 25 11:50:36 | 73.9870 | 0.00359 | 7.4689 | 155.8285 | 250.5017 | 12.52382 | – |
| 2025 Nov 27 18:57 | 2025 Nov 25 11:50:36 | 73.9870 | 0.00359 | 7.4689 | 155.8285 | 250.5017 | 12.52382 | – |
| 2025 Nov 26 18:57 | 2025 Nov 25 11:50:36 | 73.9870 | 0.00359 | 7.4689 | 155.8285 | 250.5017 | 12.52382 | – |
| 2025 Nov 25 18:57 | 2025 Nov 25 11:50:36 | 73.9870 | 0.00359 | 7.4689 | 155.8285 | 250.5017 | 12.52382 | – |
| 2025 Nov 24 18:56 | 2025 Nov 20 03:57:31 | 73.9865 | 0.00360 | 7.9443 | 163.8869 | 250.5017 | 12.52382 | – |
| 2025 Nov 23 18:57 | 2025 Nov 20 03:57:31 | 73.9865 | 0.00360 | 7.9443 | 163.8869 | 250.5017 | 12.52382 | – |
| 2025 Nov 21 18:57 | 2025 Nov 20 03:57:31 | 73.9865 | 0.00360 | 7.9443 | 163.8869 | 250.5017 | 12.52382 | – |
| 2025 Nov 20 18:56 | 2025 Nov 20 03:57:31 | 73.9865 | 0.00360 | 7.9443 | 163.8869 | 250.5017 | 12.52382 | – |
| 2025 Nov 18 18:57 | 2025 Nov 08 18:53:24 | 73.9858 | 0.00362 | 8.9594 | 181.0164 | 250.5017 | 12.52382 | – |
| 2025 Nov 16 18:58 | 2025 Nov 08 18:53:24 | 73.9858 | 0.00362 | 8.9594 | 181.0164 | 250.5017 | 12.52382 | – |
| 2025 Nov 15 18:57 | 2025 Nov 08 18:53:24 | 73.9858 | 0.00362 | 8.9594 | 181.0164 | 250.5017 | 12.52382 | – |
| 2025 Nov 13 18:56 | 2025 Nov 08 18:53:24 | 73.9858 | 0.00362 | 8.9594 | 181.0164 | 250.5017 | 12.52382 | – |
| 2025 Nov 12 18:57 | 2025 Nov 08 18:53:24 | 73.9858 | 0.00362 | 8.9594 | 181.0164 | 250.5017 | 12.52382 | – |
| 2025 Nov 11 18:55 | 2025 Nov 08 18:53:24 | 73.9858 | 0.00362 | 8.9594 | 181.0164 | 250.5017 | 12.52382 | – |
| 2025 Nov 10 18:57 | 2025 Nov 08 18:53:24 | 73.9858 | 0.00362 | 8.9594 | 181.0164 | 250.5017 | 12.52382 | – |