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 Apr 30 17:56 | 2026 Apr 27 12:43:21 | 71.8897 | 0.55508 | 0.7833 | 339.5799 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 29 17:57 | 2026 Apr 23 09:43:13 | 71.8834 | 0.55519 | 0.7960 | 339.7222 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 28 17:56 | 2026 Apr 23 09:43:13 | 71.8834 | 0.55519 | 0.7960 | 339.7222 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 27 17:58 | 2026 Apr 23 09:43:13 | 71.8834 | 0.55519 | 0.7960 | 339.7222 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 26 17:58 | 2026 Apr 23 09:43:13 | 71.8834 | 0.55519 | 0.7960 | 339.7222 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 25 17:58 | 2026 Apr 23 09:43:13 | 71.8834 | 0.55519 | 0.7960 | 339.7222 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 24 17:59 | 2026 Apr 23 09:43:13 | 71.8834 | 0.55519 | 0.7960 | 339.7222 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 23 17:57 | 2026 Apr 19 01:42:07 | 71.8770 | 0.55531 | 0.8092 | 339.8707 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 22 17:57 | 2026 Apr 19 01:42:07 | 71.8770 | 0.55531 | 0.8092 | 339.8707 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 21 17:57 | 2026 Apr 19 01:42:07 | 71.8770 | 0.55531 | 0.8092 | 339.8707 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 20 17:57 | 2026 Apr 19 01:42:07 | 71.8770 | 0.55531 | 0.8092 | 339.8707 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 19 17:58 | 2026 Apr 19 01:42:07 | 71.8770 | 0.55531 | 0.8092 | 339.8707 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 18 17:56 | 2026 Apr 13 01:57:42 | 71.8684 | 0.55547 | 0.8276 | 340.0783 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 16 17:57 | 2026 Apr 13 01:57:42 | 71.8684 | 0.55547 | 0.8276 | 340.0783 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 14 17:57 | 2026 Apr 13 01:57:42 | 71.8684 | 0.55547 | 0.8276 | 340.0783 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 13 17:57 | 2026 Apr 13 01:57:42 | 71.8684 | 0.55547 | 0.8276 | 340.0783 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 12 17:57 | 2026 Apr 03 11:20:23 | 71.8543 | 0.55575 | 0.8571 | 340.4124 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 11 17:57 | 2026 Apr 03 11:20:23 | 71.8543 | 0.55575 | 0.8571 | 340.4124 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 10 17:58 | 2026 Apr 03 11:20:23 | 71.8543 | 0.55575 | 0.8571 | 340.4124 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 09 18:01 | 2026 Apr 03 11:20:23 | 71.8543 | 0.55575 | 0.8571 | 340.4124 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 08 17:57 | 2026 Apr 03 11:20:23 | 71.8543 | 0.55575 | 0.8571 | 340.4124 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 05 17:56 | 2026 Mar 25 15:44:37 | 71.8407 | 0.55602 | 0.8842 | 340.7173 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 04 17:57 | 2026 Mar 25 15:44:37 | 71.8407 | 0.55602 | 0.8842 | 340.7173 | 235.5654 | 2.00847 | 5.743 |
| 2026 Apr 03 17:56 | 2026 Mar 25 15:44:37 | 71.8407 | 0.55602 | 0.8842 | 340.7173 | 235.5654 | 2.00847 | 5.743 |