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 Dec 31 18:57 | 2025 Dec 31 12:15:14 | 74.0303 | 0.00072 | 18.7506 | 193.9202 | 277.9604 | 12.47855 | – |
| 2025 Dec 30 18:56 | 2025 Dec 26 13:18:05 | 74.0307 | 0.00073 | 19.1879 | 201.3083 | 277.9604 | 12.47855 | – |
| 2025 Dec 29 18:56 | 2025 Dec 26 13:18:05 | 74.0307 | 0.00073 | 19.1879 | 201.3083 | 277.9604 | 12.47855 | – |
| 2025 Dec 28 18:57 | 2025 Dec 26 13:18:05 | 74.0307 | 0.00073 | 19.1879 | 201.3083 | 277.9604 | 12.47855 | – |
| 2025 Dec 27 18:57 | 2025 Dec 26 13:18:05 | 74.0307 | 0.00073 | 19.1879 | 201.3083 | 277.9604 | 12.47855 | – |
| 2025 Dec 26 18:56 | 2025 Dec 26 13:18:05 | 74.0307 | 0.00073 | 19.1879 | 201.3083 | 277.9604 | 12.47855 | – |
| 2025 Dec 25 18:57 | 2025 Dec 20 14:55:09 | 74.0306 | 0.00074 | 19.7113 | 209.9701 | 277.9604 | 12.47855 | – |
| 2025 Dec 24 18:56 | 2025 Dec 20 14:55:09 | 74.0306 | 0.00074 | 19.7113 | 209.9701 | 277.9604 | 12.47855 | – |
| 2025 Dec 23 18:56 | 2025 Dec 20 14:55:09 | 74.0306 | 0.00074 | 19.7113 | 209.9701 | 277.9604 | 12.47855 | – |
| 2025 Dec 22 18:57 | 2025 Dec 20 14:55:09 | 74.0306 | 0.00074 | 19.7113 | 209.9701 | 277.9604 | 12.47855 | – |
| 2025 Dec 21 18:57 | 2025 Dec 20 14:55:09 | 74.0306 | 0.00074 | 19.7113 | 209.9701 | 277.9604 | 12.47855 | – |
| 2025 Dec 20 18:57 | 2025 Dec 20 14:55:09 | 74.0306 | 0.00074 | 19.7113 | 209.9701 | 277.9604 | 12.47855 | – |
| 2025 Dec 19 18:57 | 2025 Dec 12 06:30:10 | 74.0300 | 0.00076 | 20.4482 | 221.9930 | 277.9604 | 12.47855 | – |
| 2025 Dec 18 18:57 | 2025 Dec 12 06:30:10 | 74.0300 | 0.00076 | 20.4482 | 221.9930 | 277.9604 | 12.47855 | – |
| 2025 Dec 17 18:58 | 2025 Dec 12 06:30:10 | 74.0300 | 0.00076 | 20.4482 | 221.9930 | 277.9604 | 12.47855 | – |
| 2025 Dec 16 18:57 | 2025 Dec 12 06:30:10 | 74.0300 | 0.00076 | 20.4482 | 221.9930 | 277.9604 | 12.47855 | – |
| 2025 Dec 15 18:58 | 2025 Dec 12 06:30:10 | 74.0300 | 0.00076 | 20.4482 | 221.9930 | 277.9604 | 12.47855 | – |
| 2025 Dec 14 18:56 | 2025 Dec 12 06:30:10 | 74.0300 | 0.00076 | 20.4482 | 221.9930 | 277.9604 | 12.47855 | – |
| 2025 Dec 13 18:56 | 2025 Dec 12 06:30:10 | 74.0300 | 0.00076 | 20.4482 | 221.9930 | 277.9604 | 12.47855 | – |
| 2025 Dec 12 18:57 | 2025 Dec 12 06:30:10 | 74.0300 | 0.00076 | 20.4482 | 221.9930 | 277.9604 | 12.47855 | – |
| 2025 Dec 11 18:56 | 2025 Dec 07 04:45:44 | 74.0296 | 0.00077 | 20.8959 | 229.1586 | 277.9604 | 12.47855 | – |
| 2025 Dec 10 18:56 | 2025 Dec 07 04:45:44 | 74.0296 | 0.00077 | 20.8959 | 229.1586 | 277.9604 | 12.47855 | – |
| 2025 Dec 09 18:56 | 2025 Dec 07 04:45:44 | 74.0296 | 0.00077 | 20.8959 | 229.1586 | 277.9604 | 12.47855 | – |
| 2025 Dec 08 18:56 | 2025 Dec 07 04:45:44 | 74.0296 | 0.00077 | 20.8959 | 229.1586 | 277.9604 | 12.47855 | – |
| 2025 Dec 07 18:56 | 2025 Dec 07 04:45:44 | 74.0296 | 0.00077 | 20.8959 | 229.1586 | 277.9604 | 12.47855 | – |
| 2025 Dec 06 18:56 | 2025 Dec 02 10:09:47 | 74.0296 | 0.00077 | 21.3173 | 235.6967 | 277.9604 | 12.47855 | – |
| 2025 Dec 05 18:57 | 2025 Dec 02 10:09:47 | 74.0296 | 0.00077 | 21.3173 | 235.6967 | 277.9604 | 12.47855 | – |
| 2025 Dec 04 18:57 | 2025 Dec 02 10:09:47 | 74.0296 | 0.00077 | 21.3173 | 235.6967 | 277.9604 | 12.47855 | – |