Orbital elements of COSMOS 1640
| Launched | 20 March 1985 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 15622 |
| 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 Dec 13 18:56 | 2025 Dec 12 05:13:01 | 74.0529 | 0.00345 | 10.0241 | 275.1196 | 195.0237 | 12.52837 | – |
| 2025 Dec 12 18:57 | 2025 Dec 12 05:13:01 | 74.0529 | 0.00345 | 10.0241 | 275.1196 | 195.0237 | 12.52837 | – |
| 2025 Dec 11 18:56 | 2025 Dec 07 06:44:58 | 74.0528 | 0.00345 | 10.4631 | 282.4595 | 195.0237 | 12.52837 | – |
| 2025 Dec 10 18:56 | 2025 Dec 07 06:44:58 | 74.0528 | 0.00345 | 10.4631 | 282.4595 | 195.0237 | 12.52837 | – |
| 2025 Dec 09 18:56 | 2025 Dec 07 06:44:58 | 74.0528 | 0.00345 | 10.4631 | 282.4595 | 195.0237 | 12.52837 | – |
| 2025 Dec 08 18:56 | 2025 Dec 07 06:44:58 | 74.0528 | 0.00345 | 10.4631 | 282.4595 | 195.0237 | 12.52837 | – |
| 2025 Dec 07 18:56 | 2025 Dec 07 06:44:58 | 74.0528 | 0.00345 | 10.4631 | 282.4595 | 195.0237 | 12.52837 | – |
| 2025 Dec 06 18:56 | 2025 Dec 01 23:57:29 | 74.0527 | 0.00344 | 10.9328 | 290.2933 | 195.0237 | 12.52837 | – |
| 2025 Dec 05 18:57 | 2025 Dec 01 23:57:29 | 74.0527 | 0.00344 | 10.9328 | 290.2933 | 195.0237 | 12.52837 | – |
| 2025 Dec 04 18:57 | 2025 Dec 01 23:57:29 | 74.0527 | 0.00344 | 10.9328 | 290.2933 | 195.0237 | 12.52837 | – |
| 2025 Dec 03 18:56 | 2025 Dec 01 23:57:29 | 74.0527 | 0.00344 | 10.9328 | 290.2933 | 195.0237 | 12.52837 | – |
| 2025 Dec 02 18:56 | 2025 Dec 01 23:57:29 | 74.0527 | 0.00344 | 10.9328 | 290.2933 | 195.0237 | 12.52837 | – |
| 2025 Nov 30 18:57 | 2025 Nov 25 12:14:20 | 74.0531 | 0.00344 | 11.5098 | 299.9574 | 195.0237 | 12.52837 | – |
| 2025 Nov 29 18:56 | 2025 Nov 25 12:14:20 | 74.0531 | 0.00344 | 11.5098 | 299.9574 | 195.0237 | 12.52837 | – |
| 2025 Nov 28 18:57 | 2025 Nov 25 12:14:20 | 74.0531 | 0.00344 | 11.5098 | 299.9574 | 195.0237 | 12.52837 | – |
| 2025 Nov 27 18:57 | 2025 Nov 25 12:14:20 | 74.0531 | 0.00344 | 11.5098 | 299.9574 | 195.0237 | 12.52837 | – |
| 2025 Nov 26 18:57 | 2025 Nov 25 12:14:20 | 74.0531 | 0.00344 | 11.5098 | 299.9574 | 195.0237 | 12.52837 | – |
| 2025 Nov 25 18:57 | 2025 Nov 25 12:14:20 | 74.0531 | 0.00344 | 11.5098 | 299.9574 | 195.0237 | 12.52837 | – |
| 2025 Nov 24 18:56 | 2025 Nov 20 00:42:18 | 74.0537 | 0.00344 | 11.9971 | 308.0902 | 195.0237 | 12.52837 | – |
| 2025 Nov 23 18:57 | 2025 Nov 20 00:42:18 | 74.0537 | 0.00344 | 11.9971 | 308.0902 | 195.0237 | 12.52837 | – |
| 2025 Nov 21 18:57 | 2025 Nov 20 00:42:18 | 74.0537 | 0.00344 | 11.9971 | 308.0902 | 195.0237 | 12.52837 | – |
| 2025 Nov 20 18:56 | 2025 Nov 20 00:42:18 | 74.0537 | 0.00344 | 11.9971 | 308.0902 | 195.0237 | 12.52837 | – |
| 2025 Nov 18 18:57 | 2025 Nov 08 15:56:10 | 74.0555 | 0.00342 | 13.0077 | 324.9830 | 195.0237 | 12.52837 | – |
| 2025 Nov 16 18:58 | 2025 Nov 08 15:56:10 | 74.0555 | 0.00342 | 13.0077 | 324.9830 | 195.0237 | 12.52837 | – |