Orbital elements of COSMOS 1639
| Launched | 20 March 1985 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 15621 |
| 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 |
| 2024 Apr 25 17:55 | 2024 Apr 21 21:36:31 | 74.0532 | 0.00252 | 19.5204 | 183.0920 | 283.7374 | 12.51038 | – |
| 2024 Apr 24 17:53 | 2024 Apr 21 21:36:31 | 74.0532 | 0.00252 | 19.5204 | 183.0920 | 283.7374 | 12.51038 | – |
| 2024 Apr 23 17:53 | 2024 Apr 21 21:36:31 | 74.0532 | 0.00252 | 19.5204 | 183.0920 | 283.7374 | 12.51038 | – |
| 2024 Apr 22 17:52 | 2024 Apr 21 21:36:31 | 74.0532 | 0.00252 | 19.5204 | 183.0920 | 283.7374 | 12.51038 | – |
| 2024 Apr 21 17:53 | 2024 Apr 15 23:38:26 | 74.0536 | 0.00253 | 20.0448 | 192.0169 | 283.7374 | 12.51038 | – |
| 2024 Apr 20 17:52 | 2024 Apr 15 23:38:26 | 74.0536 | 0.00253 | 20.0448 | 192.0169 | 283.7374 | 12.51038 | – |
| 2024 Apr 19 17:53 | 2024 Apr 15 23:38:26 | 74.0536 | 0.00253 | 20.0448 | 192.0169 | 283.7374 | 12.51038 | – |
| 2024 Apr 18 17:57 | 2024 Apr 15 23:38:26 | 74.0536 | 0.00253 | 20.0448 | 192.0169 | 283.7374 | 12.51038 | – |
| 2024 Apr 17 17:53 | 2024 Apr 15 23:38:26 | 74.0536 | 0.00253 | 20.0448 | 192.0169 | 283.7374 | 12.51038 | – |
| 2024 Apr 16 17:53 | 2024 Apr 15 23:38:26 | 74.0536 | 0.00253 | 20.0448 | 192.0169 | 283.7374 | 12.51038 | – |
| 2024 Apr 15 17:54 | 2024 Apr 09 21:14:34 | 74.0544 | 0.00254 | 20.5855 | 201.1629 | 283.7374 | 12.51038 | – |
| 2024 Apr 14 17:53 | 2024 Apr 09 21:14:34 | 74.0544 | 0.00254 | 20.5855 | 201.1629 | 283.7374 | 12.51038 | – |
| 2024 Apr 13 17:53 | 2024 Apr 09 21:14:34 | 74.0544 | 0.00254 | 20.5855 | 201.1629 | 283.7374 | 12.51038 | – |
| 2024 Apr 12 17:53 | 2024 Apr 09 21:14:34 | 74.0544 | 0.00254 | 20.5855 | 201.1629 | 283.7374 | 12.51038 | – |
| 2024 Apr 11 17:54 | 2024 Apr 09 21:14:34 | 74.0544 | 0.00254 | 20.5855 | 201.1629 | 283.7374 | 12.51038 | – |
| 2024 Apr 10 17:56 | 2024 Apr 09 21:14:34 | 74.0544 | 0.00254 | 20.5855 | 201.1629 | 283.7374 | 12.51038 | – |
| 2024 Apr 09 17:56 | 2024 Apr 04 22:45:11 | 74.0554 | 0.00254 | 21.0231 | 208.5698 | 283.7374 | 12.51038 | – |
| 2024 Apr 08 17:55 | 2024 Apr 04 22:45:11 | 74.0554 | 0.00254 | 21.0231 | 208.5698 | 283.7374 | 12.51038 | – |
| 2024 Apr 07 17:53 | 2024 Apr 04 22:45:11 | 74.0554 | 0.00254 | 21.0231 | 208.5698 | 283.7374 | 12.51038 | – |
| 2024 Apr 06 17:58 | 2024 Apr 04 22:45:11 | 74.0554 | 0.00254 | 21.0231 | 208.5698 | 283.7374 | 12.51038 | – |
| 2024 Apr 05 17:53 | 2024 Apr 04 22:45:11 | 74.0554 | 0.00254 | 21.0231 | 208.5698 | 283.7374 | 12.51038 | – |
| 2024 Apr 04 17:56 | 2024 Mar 31 01:44:29 | 74.0565 | 0.00255 | 21.4552 | 215.8765 | 283.7374 | 12.51038 | – |
| 2024 Apr 03 17:53 | 2024 Mar 31 01:44:29 | 74.0565 | 0.00255 | 21.4552 | 215.8765 | 283.7374 | 12.51038 | – |
| 2024 Apr 02 17:52 | 2024 Mar 31 01:44:29 | 74.0565 | 0.00255 | 21.4552 | 215.8765 | 283.7374 | 12.51038 | – |
| 2024 Apr 01 17:52 | 2024 Mar 31 01:44:29 | 74.0565 | 0.00255 | 21.4552 | 215.8765 | 283.7374 | 12.51038 | – |
| 2024 Mar 31 17:52 | 2024 Mar 31 01:44:29 | 74.0565 | 0.00255 | 21.4552 | 215.8765 | 283.7374 | 12.51038 | – |
| 2024 Mar 30 18:52 | 2024 Mar 24 17:50:14 | 74.0579 | 0.00256 | 22.0161 | 225.3202 | 283.7374 | 12.51038 | – |
| 2024 Mar 29 18:52 | 2024 Mar 24 17:50:14 | 74.0579 | 0.00256 | 22.0161 | 225.3202 | 283.7374 | 12.51038 | – |