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 Jun 24 17:55 | 2026 Jun 20 16:46:07 | 67.7966 | 0.58621 | 7.2159 | 61.6476 | 344.7275 | 2.00697 | – |
| 2026 Jun 23 17:56 | 2026 Jun 20 16:46:07 | 67.7966 | 0.58621 | 7.2159 | 61.6476 | 344.7275 | 2.00697 | – |
| 2026 Jun 22 17:56 | 2026 Jun 17 05:03:33 | 67.7990 | 0.58599 | 7.2300 | 61.7212 | 344.7275 | 2.00697 | – |
| 2026 Jun 21 17:57 | 2026 Jun 17 05:03:33 | 67.7990 | 0.58599 | 7.2300 | 61.7212 | 344.7275 | 2.00697 | – |
| 2026 Jun 20 17:56 | 2026 Jun 17 05:03:33 | 67.7990 | 0.58599 | 7.2300 | 61.7212 | 344.7275 | 2.00697 | – |
| 2026 Jun 19 17:57 | 2026 Jun 17 05:03:33 | 67.7990 | 0.58599 | 7.2300 | 61.7212 | 344.7275 | 2.00697 | – |
| 2026 Jun 18 17:56 | 2026 Jun 17 05:03:33 | 67.7990 | 0.58599 | 7.2300 | 61.7212 | 344.7275 | 2.00697 | – |
| 2026 Jun 17 17:57 | 2026 Jun 17 05:03:33 | 67.7990 | 0.58599 | 7.2300 | 61.7212 | 344.7275 | 2.00697 | – |
| 2026 Jun 16 17:55 | 2026 Jun 11 05:33:55 | 67.8031 | 0.58560 | 7.2540 | 61.8475 | 344.7275 | 2.00697 | – |
| 2026 Jun 15 17:56 | 2026 Jun 11 05:33:55 | 67.8031 | 0.58560 | 7.2540 | 61.8475 | 344.7275 | 2.00697 | – |
| 2026 Jun 14 17:57 | 2026 Jun 11 05:33:55 | 67.8031 | 0.58560 | 7.2540 | 61.8475 | 344.7275 | 2.00697 | – |
| 2026 Jun 13 17:56 | 2026 Jun 11 05:33:55 | 67.8031 | 0.58560 | 7.2540 | 61.8475 | 344.7275 | 2.00697 | – |
| 2026 Jun 12 17:56 | 2026 Jun 11 05:33:55 | 67.8031 | 0.58560 | 7.2540 | 61.8475 | 344.7275 | 2.00697 | – |
| 2026 Jun 11 17:57 | 2026 Jun 05 06:04:42 | 67.8072 | 0.58520 | 7.2781 | 61.9747 | 344.7275 | 2.00697 | – |
| 2026 Jun 10 17:56 | 2026 Jun 05 06:04:42 | 67.8072 | 0.58520 | 7.2781 | 61.9747 | 344.7275 | 2.00697 | – |
| 2026 Jun 09 17:57 | 2026 Jun 05 06:04:42 | 67.8072 | 0.58520 | 7.2781 | 61.9747 | 344.7275 | 2.00697 | – |
| 2026 Jun 08 17:56 | 2026 Jun 05 06:04:42 | 67.8072 | 0.58520 | 7.2781 | 61.9747 | 344.7275 | 2.00697 | – |
| 2026 Jun 07 17:56 | 2026 Jun 05 06:04:42 | 67.8072 | 0.58520 | 7.2781 | 61.9747 | 344.7275 | 2.00697 | – |
| 2026 Jun 06 17:56 | 2026 May 31 06:30:36 | 67.8107 | 0.58488 | 7.2981 | 62.0815 | 344.7275 | 2.00697 | – |
| 2026 Jun 05 17:56 | 2026 May 31 06:30:36 | 67.8107 | 0.58488 | 7.2981 | 62.0815 | 344.7275 | 2.00697 | – |
| 2026 Jun 04 17:57 | 2026 May 31 06:30:36 | 67.8107 | 0.58488 | 7.2981 | 62.0815 | 344.7275 | 2.00697 | – |
| 2026 Jun 02 17:56 | 2026 May 31 06:30:36 | 67.8107 | 0.58488 | 7.2981 | 62.0815 | 344.7275 | 2.00697 | – |
| 2026 Jun 01 17:57 | 2026 May 31 06:30:36 | 67.8107 | 0.58488 | 7.2981 | 62.0815 | 344.7275 | 2.00697 | – |
| 2026 May 31 17:58 | 2026 May 31 06:30:36 | 67.8107 | 0.58488 | 7.2981 | 62.0815 | 344.7275 | 2.00697 | – |
| 2026 May 30 17:57 | 2026 May 21 19:20:50 | 67.8165 | 0.58425 | 7.3360 | 62.2840 | 344.7275 | 2.00697 | – |
| 2026 May 29 17:57 | 2026 May 21 19:20:50 | 67.8165 | 0.58425 | 7.3360 | 62.2840 | 344.7275 | 2.00697 | – |
| 2026 May 28 17:56 | 2026 May 21 19:20:50 | 67.8165 | 0.58425 | 7.3360 | 62.2840 | 344.7275 | 2.00697 | – |