Orbital elements of COSMOS 1691
| Launched | 8 October 1985 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 16139 |
| 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 00:41:00 | 82.6074 | 0.00012 | 6.9850 | 79.5688 | 73.5286 | 12.62465 | 8.743 |
| 2025 Sep 12 17:57 | 2025 Sep 03 01:29:15 | 82.6093 | 0.00012 | 7.4921 | 82.2451 | 73.5286 | 12.62465 | 8.743 |
| 2025 Sep 11 17:57 | 2025 Sep 03 01:29:15 | 82.6093 | 0.00012 | 7.4921 | 82.2451 | 73.5286 | 12.62465 | 8.743 |
| 2025 Sep 10 17:56 | 2025 Sep 03 01:29:15 | 82.6093 | 0.00012 | 7.4921 | 82.2451 | 73.5286 | 12.62465 | 8.743 |
| 2025 Sep 08 17:57 | 2025 Sep 03 01:29:15 | 82.6093 | 0.00012 | 7.4921 | 82.2451 | 73.5286 | 12.62465 | 8.743 |
| 2025 Sep 07 17:56 | 2025 Sep 03 01:29:15 | 82.6093 | 0.00012 | 7.4921 | 82.2451 | 73.5286 | 12.62465 | 8.743 |
| 2025 Sep 06 20:41 | 2025 Sep 03 01:29:15 | 82.6093 | 0.00012 | 7.4921 | 82.2451 | 73.5286 | 12.62465 | 8.743 |
| 2025 Sep 03 17:57 | 2025 Sep 03 01:29:15 | 82.6093 | 0.00012 | 7.4921 | 82.2451 | 73.5286 | 12.62465 | 8.743 |
| 2025 Sep 02 17:56 | 2025 Aug 27 22:16:25 | 82.6104 | 0.00012 | 7.7520 | 82.9144 | 73.5286 | 12.62465 | 8.743 |
| 2025 Sep 01 17:56 | 2025 Aug 27 22:16:25 | 82.6104 | 0.00012 | 7.7520 | 82.9144 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 31 17:56 | 2025 Aug 27 22:16:25 | 82.6104 | 0.00012 | 7.7520 | 82.9144 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 30 17:56 | 2025 Aug 27 22:16:25 | 82.6104 | 0.00012 | 7.7520 | 82.9144 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 29 17:56 | 2025 Aug 27 22:16:25 | 82.6104 | 0.00012 | 7.7520 | 82.9144 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 28 17:57 | 2025 Aug 27 22:16:25 | 82.6104 | 0.00012 | 7.7520 | 82.9144 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 27 17:56 | 2025 Aug 23 04:46:02 | 82.6111 | 0.00012 | 7.9523 | 84.3738 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 26 17:56 | 2025 Aug 23 04:46:02 | 82.6111 | 0.00012 | 7.9523 | 84.3738 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 25 17:56 | 2025 Aug 23 04:46:02 | 82.6111 | 0.00012 | 7.9523 | 84.3738 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 24 17:56 | 2025 Aug 23 04:46:02 | 82.6111 | 0.00012 | 7.9523 | 84.3738 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 23 17:56 | 2025 Aug 23 04:46:02 | 82.6111 | 0.00012 | 7.9523 | 84.3738 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 22 17:56 | 2025 Aug 17 22:37:33 | 82.6121 | 0.00012 | 8.1750 | 85.2825 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 20 17:56 | 2025 Aug 17 22:37:33 | 82.6121 | 0.00012 | 8.1750 | 85.2825 | 73.5286 | 12.62465 | 8.743 |
| 2025 Aug 19 17:56 | 2025 Aug 17 22:37:33 | 82.6121 | 0.00012 | 8.1750 | 85.2825 | 73.5286 | 12.62465 | 8.743 |