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 |
| 2026 Apr 30 17:56 | 2026 Apr 30 14:42:43 | 82.6106 | 0.00006 | 21.3435 | 76.5961 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 29 17:57 | 2026 Apr 24 09:01:57 | 82.6114 | 0.00007 | 21.6078 | 66.4729 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 28 17:56 | 2026 Apr 24 09:01:57 | 82.6114 | 0.00007 | 21.6078 | 66.4729 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 27 17:58 | 2026 Apr 24 09:01:57 | 82.6114 | 0.00007 | 21.6078 | 66.4729 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 26 17:58 | 2026 Apr 24 09:01:57 | 82.6114 | 0.00007 | 21.6078 | 66.4729 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 25 17:58 | 2026 Apr 24 09:01:57 | 82.6114 | 0.00007 | 21.6078 | 66.4729 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 24 17:59 | 2026 Apr 24 09:01:57 | 82.6114 | 0.00007 | 21.6078 | 66.4729 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 23 17:57 | 2026 Apr 19 09:12:21 | 82.6122 | 0.00008 | 21.8194 | 60.8124 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 22 17:57 | 2026 Apr 19 09:12:21 | 82.6122 | 0.00008 | 21.8194 | 60.8124 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 21 17:57 | 2026 Apr 19 09:12:21 | 82.6122 | 0.00008 | 21.8194 | 60.8124 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 20 17:57 | 2026 Apr 19 09:12:21 | 82.6122 | 0.00008 | 21.8194 | 60.8124 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 19 17:58 | 2026 Apr 19 09:12:21 | 82.6122 | 0.00008 | 21.8194 | 60.8124 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 18 17:56 | 2026 Apr 13 02:51:16 | 82.6135 | 0.00009 | 22.0848 | 56.5818 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 16 17:57 | 2026 Apr 13 02:51:16 | 82.6135 | 0.00009 | 22.0848 | 56.5818 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 14 17:57 | 2026 Apr 13 02:51:16 | 82.6135 | 0.00009 | 22.0848 | 56.5818 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 13 17:57 | 2026 Apr 13 02:51:16 | 82.6135 | 0.00009 | 22.0848 | 56.5818 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 12 17:57 | 2026 Apr 08 10:43:50 | 82.6144 | 0.00010 | 22.2827 | 55.7091 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 11 17:57 | 2026 Apr 08 10:43:50 | 82.6144 | 0.00010 | 22.2827 | 55.7091 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 10 17:58 | 2026 Apr 08 10:43:50 | 82.6144 | 0.00010 | 22.2827 | 55.7091 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 09 18:01 | 2026 Apr 08 10:43:50 | 82.6144 | 0.00010 | 22.2827 | 55.7091 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 08 17:57 | 2026 Apr 08 10:43:50 | 82.6144 | 0.00010 | 22.2827 | 55.7091 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 07 17:57 | 2026 Apr 02 04:11:45 | 82.6157 | 0.00011 | 22.5483 | 55.1767 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 06 17:57 | 2026 Apr 02 04:11:45 | 82.6157 | 0.00011 | 22.5483 | 55.1767 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 05 17:56 | 2026 Apr 02 04:11:45 | 82.6157 | 0.00011 | 22.5483 | 55.1767 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 04 17:57 | 2026 Apr 02 04:11:45 | 82.6157 | 0.00011 | 22.5483 | 55.1767 | 347.9455 | 12.62475 | 8.743 |
| 2026 Apr 03 17:56 | 2026 Apr 02 04:11:45 | 82.6157 | 0.00011 | 22.5483 | 55.1767 | 347.9455 | 12.62475 | 8.743 |