Orbital elements of COSMOS 1687
| Launched | 29 September 1985 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 16103 |
| 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 |
| 2026 Mar 13 18:57 | 2026 Mar 09 17:50:14 | 71.8156 | 0.55654 | 0.9333 | 341.2654 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 12 18:57 | 2026 Mar 09 17:50:14 | 71.8156 | 0.55654 | 0.9333 | 341.2654 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 11 18:56 | 2026 Mar 09 17:50:14 | 71.8156 | 0.55654 | 0.9333 | 341.2654 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 10 18:56 | 2026 Mar 09 17:50:14 | 71.8156 | 0.55654 | 0.9333 | 341.2654 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 09 18:56 | 2026 Mar 03 18:04:45 | 71.8052 | 0.55675 | 0.9518 | 341.4695 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 08 18:57 | 2026 Mar 03 18:04:45 | 71.8052 | 0.55675 | 0.9518 | 341.4695 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 07 18:57 | 2026 Mar 03 18:04:45 | 71.8052 | 0.55675 | 0.9518 | 341.4695 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 06 18:56 | 2026 Mar 03 18:04:45 | 71.8052 | 0.55675 | 0.9518 | 341.4695 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 05 18:56 | 2026 Mar 03 18:04:45 | 71.8052 | 0.55675 | 0.9518 | 341.4695 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 04 18:57 | 2026 Mar 03 18:04:45 | 71.8052 | 0.55675 | 0.9518 | 341.4695 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 03 18:56 | 2026 Feb 25 19:27:30 | 71.7950 | 0.55695 | 0.9701 | 341.6723 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 02 18:57 | 2026 Feb 25 19:27:30 | 71.7950 | 0.55695 | 0.9701 | 341.6723 | 239.4333 | 2.00849 | 5.743 |
| 2026 Mar 01 18:57 | 2026 Feb 25 19:27:30 | 71.7950 | 0.55695 | 0.9701 | 341.6723 | 239.4333 | 2.00849 | 5.743 |
| 2026 Feb 28 18:56 | 2026 Feb 25 19:27:30 | 71.7950 | 0.55695 | 0.9701 | 341.6723 | 239.4333 | 2.00849 | 5.743 |
| 2026 Feb 27 19:05 | 2026 Feb 25 19:27:30 | 71.7950 | 0.55695 | 0.9701 | 341.6723 | 239.4333 | 2.00849 | 5.743 |
| 2026 Feb 26 20:45 | 2026 Feb 25 19:27:30 | 71.7950 | 0.55695 | 0.9701 | 341.6723 | 239.4333 | 2.00849 | 5.743 |