Orbital elements of COSMOS 1641
| Launched | 20 March 1985 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 15623 |
| 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 05:20:24 | 74.0557 | 0.00441 | 13.6153 | 334.9687 | 91.0725 | 12.54557 | – |
| 2025 Sep 12 17:57 | 2025 Sep 03 04:04:36 | 74.0535 | 0.00439 | 14.6905 | 353.1131 | 91.0725 | 12.54557 | – |
| 2025 Sep 11 17:57 | 2025 Sep 03 04:04:36 | 74.0535 | 0.00439 | 14.6905 | 353.1131 | 91.0725 | 12.54557 | – |
| 2025 Sep 10 17:56 | 2025 Sep 03 04:04:36 | 74.0535 | 0.00439 | 14.6905 | 353.1131 | 91.0725 | 12.54557 | – |
| 2025 Sep 08 17:57 | 2025 Sep 03 04:04:36 | 74.0535 | 0.00439 | 14.6905 | 353.1131 | 91.0725 | 12.54557 | – |
| 2025 Sep 07 17:56 | 2025 Sep 03 04:04:36 | 74.0535 | 0.00439 | 14.6905 | 353.1131 | 91.0725 | 12.54557 | – |
| 2025 Sep 06 20:41 | 2025 Sep 03 04:04:36 | 74.0535 | 0.00439 | 14.6905 | 353.1131 | 91.0725 | 12.54557 | – |
| 2025 Sep 03 17:57 | 2025 Sep 03 04:04:36 | 74.0535 | 0.00439 | 14.6905 | 353.1131 | 91.0725 | 12.54557 | – |
| 2025 Sep 02 17:56 | 2025 Aug 27 17:36:05 | 74.0524 | 0.00437 | 15.2647 | 2.8587 | 91.0725 | 12.54557 | – |
| 2025 Sep 01 17:56 | 2025 Aug 27 17:36:05 | 74.0524 | 0.00437 | 15.2647 | 2.8587 | 91.0725 | 12.54557 | – |
| 2025 Aug 31 17:56 | 2025 Aug 27 17:36:05 | 74.0524 | 0.00437 | 15.2647 | 2.8587 | 91.0725 | 12.54557 | – |
| 2025 Aug 30 17:56 | 2025 Aug 27 17:36:05 | 74.0524 | 0.00437 | 15.2647 | 2.8587 | 91.0725 | 12.54557 | – |
| 2025 Aug 29 17:56 | 2025 Aug 27 17:36:05 | 74.0524 | 0.00437 | 15.2647 | 2.8587 | 91.0725 | 12.54557 | – |
| 2025 Aug 28 17:57 | 2025 Aug 27 17:36:05 | 74.0524 | 0.00437 | 15.2647 | 2.8587 | 91.0725 | 12.54557 | – |
| 2025 Aug 27 17:56 | 2025 Aug 23 05:54:35 | 74.0520 | 0.00437 | 15.6651 | 9.6841 | 91.0725 | 12.54557 | – |
| 2025 Aug 26 17:56 | 2025 Aug 23 05:54:35 | 74.0520 | 0.00437 | 15.6651 | 9.6841 | 91.0725 | 12.54557 | – |
| 2025 Aug 25 17:56 | 2025 Aug 23 05:54:35 | 74.0520 | 0.00437 | 15.6651 | 9.6841 | 91.0725 | 12.54557 | – |
| 2025 Aug 24 17:56 | 2025 Aug 23 05:54:35 | 74.0520 | 0.00437 | 15.6651 | 9.6841 | 91.0725 | 12.54557 | – |
| 2025 Aug 23 17:56 | 2025 Aug 23 05:54:35 | 74.0520 | 0.00437 | 15.6651 | 9.6841 | 91.0725 | 12.54557 | – |
| 2025 Aug 22 17:56 | 2025 Aug 18 11:39:06 | 74.0519 | 0.00436 | 16.0898 | 16.9348 | 91.0725 | 12.54557 | – |
| 2025 Aug 20 17:56 | 2025 Aug 18 11:39:06 | 74.0519 | 0.00436 | 16.0898 | 16.9348 | 91.0725 | 12.54557 | – |