Orbital elements of COSMOS 1257
| Launched | 5 March 1981 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 12327 |
| 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 04:25:19 | 74.0276 | 0.00072 | 4.2210 | 345.1642 | 188.2901 | 12.47852 | – |
| 2025 Sep 12 17:57 | 2025 Sep 02 23:42:19 | 74.0265 | 0.00070 | 5.2975 | 3.2135 | 188.2901 | 12.47852 | – |
| 2025 Sep 11 17:57 | 2025 Sep 02 23:42:19 | 74.0265 | 0.00070 | 5.2975 | 3.2135 | 188.2901 | 12.47852 | – |
| 2025 Sep 10 17:56 | 2025 Sep 02 23:42:19 | 74.0265 | 0.00070 | 5.2975 | 3.2135 | 188.2901 | 12.47852 | – |
| 2025 Sep 08 17:57 | 2025 Sep 02 23:42:19 | 74.0265 | 0.00070 | 5.2975 | 3.2135 | 188.2901 | 12.47852 | – |
| 2025 Sep 07 17:56 | 2025 Sep 02 23:42:19 | 74.0265 | 0.00070 | 5.2975 | 3.2135 | 188.2901 | 12.47852 | – |
| 2025 Sep 06 20:41 | 2025 Sep 02 23:42:19 | 74.0265 | 0.00070 | 5.2975 | 3.2135 | 188.2901 | 12.47852 | – |
| 2025 Sep 03 17:57 | 2025 Sep 02 23:42:19 | 74.0265 | 0.00070 | 5.2975 | 3.2135 | 188.2901 | 12.47852 | – |
| 2025 Sep 02 17:56 | 2025 Aug 27 20:53:37 | 74.0268 | 0.00069 | 5.8374 | 12.3877 | 188.2901 | 12.47852 | – |
| 2025 Sep 01 17:56 | 2025 Aug 27 20:53:37 | 74.0268 | 0.00069 | 5.8374 | 12.3877 | 188.2901 | 12.47852 | – |
| 2025 Aug 31 17:56 | 2025 Aug 27 20:53:37 | 74.0268 | 0.00069 | 5.8374 | 12.3877 | 188.2901 | 12.47852 | – |
| 2025 Aug 30 17:56 | 2025 Aug 27 20:53:37 | 74.0268 | 0.00069 | 5.8374 | 12.3877 | 188.2901 | 12.47852 | – |
| 2025 Aug 29 17:56 | 2025 Aug 27 20:53:37 | 74.0268 | 0.00069 | 5.8374 | 12.3877 | 188.2901 | 12.47852 | – |
| 2025 Aug 28 17:57 | 2025 Aug 27 20:53:37 | 74.0268 | 0.00069 | 5.8374 | 12.3877 | 188.2901 | 12.47852 | – |
| 2025 Aug 27 17:56 | 2025 Aug 23 01:47:21 | 74.0272 | 0.00068 | 6.2606 | 19.6230 | 188.2901 | 12.47852 | – |
| 2025 Aug 26 17:56 | 2025 Aug 23 01:47:21 | 74.0272 | 0.00068 | 6.2606 | 19.6230 | 188.2901 | 12.47852 | – |
| 2025 Aug 25 17:56 | 2025 Aug 23 01:47:21 | 74.0272 | 0.00068 | 6.2606 | 19.6230 | 188.2901 | 12.47852 | – |
| 2025 Aug 24 17:56 | 2025 Aug 23 01:47:21 | 74.0272 | 0.00068 | 6.2606 | 19.6230 | 188.2901 | 12.47852 | – |
| 2025 Aug 23 17:56 | 2025 Aug 23 01:47:21 | 74.0272 | 0.00068 | 6.2606 | 19.6230 | 188.2901 | 12.47852 | – |
| 2025 Aug 22 17:56 | 2025 Aug 18 08:48:46 | 74.0277 | 0.00068 | 6.6761 | 26.8307 | 188.2901 | 12.47852 | – |