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 Aug 25 17:56 | 2026 Aug 20 00:06:31 | 67.7544 | 0.58989 | 6.9706 | 60.3687 | 345.5870 | 2.00599 | – |
| 2026 Aug 24 17:57 | 2026 Aug 17 12:17:16 | 67.7563 | 0.58973 | 6.9808 | 60.4207 | 345.5870 | 2.00599 | – |
| 2026 Aug 23 17:56 | 2026 Aug 17 12:17:16 | 67.7563 | 0.58973 | 6.9808 | 60.4207 | 345.5870 | 2.00599 | – |
| 2026 Aug 22 17:56 | 2026 Aug 17 12:17:16 | 67.7563 | 0.58973 | 6.9808 | 60.4207 | 345.5870 | 2.00599 | – |
| 2026 Aug 21 17:56 | 2026 Aug 17 12:17:16 | 67.7563 | 0.58973 | 6.9808 | 60.4207 | 345.5870 | 2.00599 | – |
| 2026 Aug 20 17:57 | 2026 Aug 17 12:17:16 | 67.7563 | 0.58973 | 6.9808 | 60.4207 | 345.5870 | 2.00599 | – |
| 2026 Aug 19 17:57 | 2026 Aug 17 12:17:16 | 67.7563 | 0.58973 | 6.9808 | 60.4207 | 345.5870 | 2.00599 | – |
| 2026 Aug 18 17:56 | 2026 Aug 12 12:38:56 | 67.7597 | 0.58941 | 7.0012 | 60.5266 | 345.5870 | 2.00599 | – |
| 2026 Aug 17 17:56 | 2026 Aug 12 12:38:56 | 67.7597 | 0.58941 | 7.0012 | 60.5266 | 345.5870 | 2.00599 | – |
| 2026 Aug 16 17:56 | 2026 Aug 12 12:38:56 | 67.7597 | 0.58941 | 7.0012 | 60.5266 | 345.5870 | 2.00599 | – |
| 2026 Aug 15 17:57 | 2026 Aug 12 12:38:56 | 67.7597 | 0.58941 | 7.0012 | 60.5266 | 345.5870 | 2.00599 | – |
| 2026 Aug 14 17:56 | 2026 Aug 12 12:38:56 | 67.7597 | 0.58941 | 7.0012 | 60.5266 | 345.5870 | 2.00599 | – |
| 2026 Aug 13 17:57 | 2026 Aug 12 12:38:56 | 67.7597 | 0.58941 | 7.0012 | 60.5266 | 345.5870 | 2.00599 | – |
| 2026 Aug 12 17:56 | 2026 Aug 03 01:20:52 | 67.7635 | 0.58887 | 7.0399 | 60.7270 | 345.5870 | 2.00599 | – |
| 2026 Aug 11 17:56 | 2026 Aug 03 01:20:52 | 67.7635 | 0.58887 | 7.0399 | 60.7270 | 345.5870 | 2.00599 | – |
| 2026 Aug 10 17:56 | 2026 Aug 03 01:20:52 | 67.7635 | 0.58887 | 7.0399 | 60.7270 | 345.5870 | 2.00599 | – |
| 2026 Aug 09 17:57 | 2026 Aug 03 01:20:52 | 67.7635 | 0.58887 | 7.0399 | 60.7270 | 345.5870 | 2.00599 | – |
| 2026 Aug 08 17:57 | 2026 Aug 03 01:20:52 | 67.7635 | 0.58887 | 7.0399 | 60.7270 | 345.5870 | 2.00599 | – |
| 2026 Aug 07 17:57 | 2026 Aug 03 01:20:52 | 67.7635 | 0.58887 | 7.0399 | 60.7270 | 345.5870 | 2.00599 | – |
| 2026 Aug 06 17:57 | 2026 Aug 01 01:29:50 | 67.7673 | 0.58875 | 7.0480 | 60.7692 | 345.5870 | 2.00599 | – |
| 2026 Aug 05 17:56 | 2026 Aug 01 01:29:50 | 67.7673 | 0.58875 | 7.0480 | 60.7692 | 345.5870 | 2.00599 | – |
| 2026 Aug 04 17:57 | 2026 Aug 01 01:29:50 | 67.7673 | 0.58875 | 7.0480 | 60.7692 | 345.5870 | 2.00599 | – |
| 2026 Aug 03 17:56 | 2026 Aug 01 01:29:50 | 67.7673 | 0.58875 | 7.0480 | 60.7692 | 345.5870 | 2.00599 | – |
| 2026 Aug 02 17:57 | 2026 Aug 01 01:29:50 | 67.7673 | 0.58875 | 7.0480 | 60.7692 | 345.5870 | 2.00599 | – |
| 2026 Aug 01 17:57 | 2026 Aug 01 01:29:50 | 67.7673 | 0.58875 | 7.0480 | 60.7692 | 345.5870 | 2.00599 | – |
| 2026 Jul 31 17:56 | 2026 Jul 27 01:52:19 | 67.7698 | 0.58846 | 7.0684 | 60.8748 | 345.5870 | 2.00599 | – |
| 2026 Jul 30 17:57 | 2026 Jul 27 01:52:19 | 67.7698 | 0.58846 | 7.0684 | 60.8748 | 345.5870 | 2.00599 | – |
| 2026 Jul 29 17:57 | 2026 Jul 27 01:52:19 | 67.7698 | 0.58846 | 7.0684 | 60.8748 | 345.5870 | 2.00599 | – |