Orbital elements of COSMOS 1251
| Launched | 5 March 1981 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 12321 |
| 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 Sep 15 17:56 | 2025 Sep 15 05:21:58 | 74.0271 | 0.00446 | 4.9759 | 209.8989 | 323.0258 | 12.56484 | – |
| 2025 Sep 12 17:57 | 2025 Sep 03 01:00:07 | 74.0270 | 0.00447 | 6.0685 | 228.2846 | 323.0258 | 12.56484 | – |
| 2025 Sep 11 17:57 | 2025 Sep 03 01:00:07 | 74.0270 | 0.00447 | 6.0685 | 228.2846 | 323.0258 | 12.56484 | – |
| 2025 Sep 10 17:56 | 2025 Sep 03 01:00:07 | 74.0270 | 0.00447 | 6.0685 | 228.2846 | 323.0258 | 12.56484 | – |
| 2025 Sep 08 17:57 | 2025 Sep 03 01:00:07 | 74.0270 | 0.00447 | 6.0685 | 228.2846 | 323.0258 | 12.56484 | – |
| 2025 Sep 07 17:56 | 2025 Sep 03 01:00:07 | 74.0270 | 0.00447 | 6.0685 | 228.2846 | 323.0258 | 12.56484 | – |
| 2025 Sep 06 20:41 | 2025 Sep 03 01:00:07 | 74.0270 | 0.00447 | 6.0685 | 228.2846 | 323.0258 | 12.56484 | – |
| 2025 Sep 03 17:57 | 2025 Sep 03 01:00:07 | 74.0270 | 0.00447 | 6.0685 | 228.2846 | 323.0258 | 12.56484 | – |
| 2025 Sep 02 17:56 | 2025 Aug 27 23:14:16 | 74.0276 | 0.00448 | 6.6132 | 237.4468 | 323.0258 | 12.56484 | – |
| 2025 Sep 01 17:56 | 2025 Aug 27 23:14:16 | 74.0276 | 0.00448 | 6.6132 | 237.4468 | 323.0258 | 12.56484 | – |
| 2025 Aug 31 17:56 | 2025 Aug 27 23:14:16 | 74.0276 | 0.00448 | 6.6132 | 237.4468 | 323.0258 | 12.56484 | – |
| 2025 Aug 30 17:56 | 2025 Aug 27 23:14:16 | 74.0276 | 0.00448 | 6.6132 | 237.4468 | 323.0258 | 12.56484 | – |
| 2025 Aug 29 17:56 | 2025 Aug 27 23:14:16 | 74.0276 | 0.00448 | 6.6132 | 237.4468 | 323.0258 | 12.56484 | – |
| 2025 Aug 28 17:57 | 2025 Aug 27 23:14:16 | 74.0276 | 0.00448 | 6.6132 | 237.4468 | 323.0258 | 12.56484 | – |
| 2025 Aug 27 17:56 | 2025 Aug 23 02:56:42 | 74.0281 | 0.00448 | 7.0478 | 244.7366 | 323.0258 | 12.56484 | – |
| 2025 Aug 26 17:56 | 2025 Aug 23 02:56:42 | 74.0281 | 0.00448 | 7.0478 | 244.7366 | 323.0258 | 12.56484 | – |
| 2025 Aug 25 17:56 | 2025 Aug 23 02:56:42 | 74.0281 | 0.00448 | 7.0478 | 244.7366 | 323.0258 | 12.56484 | – |
| 2025 Aug 24 17:56 | 2025 Aug 23 02:56:42 | 74.0281 | 0.00448 | 7.0478 | 244.7366 | 323.0258 | 12.56484 | – |
| 2025 Aug 23 17:56 | 2025 Aug 23 02:56:42 | 74.0281 | 0.00448 | 7.0478 | 244.7366 | 323.0258 | 12.56484 | – |
| 2025 Aug 22 17:56 | 2025 Aug 17 22:11:53 | 74.0289 | 0.00449 | 7.5139 | 252.5512 | 323.0258 | 12.56484 | – |