Orbital elements of COSMOS 1666
| Launched | 7 July 1985 |
| Flight ended | 14 June 2025 |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 15889 |
| 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 Jun 26 17:56 | 2025 Jun 15 09:11:00 | 82.4378 | 0.00171 | 19.8048 | 286.4977 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 25 17:56 | 2025 Jun 15 09:11:00 | 82.4378 | 0.00171 | 19.8048 | 286.4977 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 24 17:56 | 2025 Jun 15 09:11:00 | 82.4378 | 0.00171 | 19.8048 | 286.4977 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 23 17:56 | 2025 Jun 15 09:11:00 | 82.4378 | 0.00171 | 19.8048 | 286.4977 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 22 17:56 | 2025 Jun 15 09:11:00 | 82.4378 | 0.00171 | 19.8048 | 286.4977 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 21 17:56 | 2025 Jun 15 09:11:00 | 82.4378 | 0.00171 | 19.8048 | 286.4977 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 20 17:57 | 2025 Jun 15 09:11:00 | 82.4378 | 0.00171 | 19.8048 | 286.4977 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 19 17:56 | 2025 Jun 15 09:11:00 | 82.4378 | 0.00171 | 19.8048 | 286.4977 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 18 17:56 | 2025 Jun 15 09:11:00 | 82.4378 | 0.00171 | 19.8048 | 286.4977 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 17 17:56 | 2025 Jun 15 09:11:00 | 82.4378 | 0.00171 | 19.8048 | 286.4977 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 16 17:56 | 2025 Jun 12 15:15:18 | 82.4478 | 0.00117 | 20.0206 | 255.2217 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 15 17:56 | 2025 Jun 12 15:15:18 | 82.4478 | 0.00117 | 20.0206 | 255.2217 | 132.9625 | 16.50473 | 4.743 |
| 2025 Jun 14 17:56 | 2025 Jun 12 15:15:18 | 82.4478 | 0.00117 | 20.0206 | 255.2217 | 132.9625 | 16.50473 | 4.743 |