Orbital elements of COSMOS 1661
| Launched | 17 June 1985 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 15827 |
| 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 16 18:57 | 2026 Mar 13 01:58:38 | 67.8419 | 0.57961 | 7.6128 | 63.8314 | 343.8638 | 2.00830 | – |
| 2026 Mar 15 18:56 | 2026 Mar 13 01:58:38 | 67.8419 | 0.57961 | 7.6128 | 63.8314 | 343.8638 | 2.00830 | – |
| 2026 Mar 14 18:56 | 2026 Mar 10 02:16:26 | 67.8428 | 0.57942 | 7.6246 | 63.9006 | 343.8638 | 2.00830 | – |
| 2026 Mar 13 18:57 | 2026 Mar 10 02:16:26 | 67.8428 | 0.57942 | 7.6246 | 63.9006 | 343.8638 | 2.00830 | – |
| 2026 Mar 12 18:57 | 2026 Mar 10 02:16:26 | 67.8428 | 0.57942 | 7.6246 | 63.9006 | 343.8638 | 2.00830 | – |
| 2026 Mar 11 18:56 | 2026 Mar 10 02:16:26 | 67.8428 | 0.57942 | 7.6246 | 63.9006 | 343.8638 | 2.00830 | – |
| 2026 Mar 10 18:56 | 2026 Mar 10 02:16:26 | 67.8428 | 0.57942 | 7.6246 | 63.9006 | 343.8638 | 2.00830 | – |
| 2026 Mar 09 18:56 | 2026 Mar 04 02:52:13 | 67.8429 | 0.57905 | 7.6482 | 64.0384 | 343.8638 | 2.00830 | – |
| 2026 Mar 08 18:57 | 2026 Mar 04 02:52:13 | 67.8429 | 0.57905 | 7.6482 | 64.0384 | 343.8638 | 2.00830 | – |
| 2026 Mar 07 18:57 | 2026 Mar 04 02:52:13 | 67.8429 | 0.57905 | 7.6482 | 64.0384 | 343.8638 | 2.00830 | – |
| 2026 Mar 06 18:56 | 2026 Mar 04 02:52:13 | 67.8429 | 0.57905 | 7.6482 | 64.0384 | 343.8638 | 2.00830 | – |
| 2026 Mar 05 18:56 | 2026 Mar 04 02:52:13 | 67.8429 | 0.57905 | 7.6482 | 64.0384 | 343.8638 | 2.00830 | – |
| 2026 Mar 04 18:57 | 2026 Mar 04 02:52:13 | 67.8429 | 0.57905 | 7.6482 | 64.0384 | 343.8638 | 2.00830 | – |
| 2026 Mar 03 18:56 | 2026 Feb 25 03:33:52 | 67.8414 | 0.57860 | 7.6757 | 64.1993 | 343.8638 | 2.00830 | – |
| 2026 Mar 02 18:57 | 2026 Feb 25 03:33:52 | 67.8414 | 0.57860 | 7.6757 | 64.1993 | 343.8638 | 2.00830 | – |
| 2026 Mar 01 18:57 | 2026 Feb 25 03:33:52 | 67.8414 | 0.57860 | 7.6757 | 64.1993 | 343.8638 | 2.00830 | – |
| 2026 Feb 28 18:56 | 2026 Feb 25 03:33:52 | 67.8414 | 0.57860 | 7.6757 | 64.1993 | 343.8638 | 2.00830 | – |
| 2026 Feb 27 19:05 | 2026 Feb 25 03:33:52 | 67.8414 | 0.57860 | 7.6757 | 64.1993 | 343.8638 | 2.00830 | – |
| 2026 Feb 26 20:45 | 2026 Feb 25 03:33:52 | 67.8414 | 0.57860 | 7.6757 | 64.1993 | 343.8638 | 2.00830 | – |