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 |
| 2025 Jun 30 17:56 | 2025 Jun 28 11:58:17 | 74.0559 | 0.00255 | 5.1806 | 249.6742 | 284.8172 | 12.51051 | – |
| 2025 Jun 29 17:56 | 2025 Jun 28 11:58:17 | 74.0559 | 0.00255 | 5.1806 | 249.6742 | 284.8172 | 12.51051 | – |
| 2025 Jun 28 17:56 | 2025 Jun 28 11:58:17 | 74.0559 | 0.00255 | 5.1806 | 249.6742 | 284.8172 | 12.51051 | – |
| 2025 Jun 27 17:56 | 2025 Jun 22 12:02:14 | 74.0559 | 0.00256 | 5.7121 | 258.5691 | 284.8172 | 12.51051 | – |
| 2025 Jun 26 17:56 | 2025 Jun 22 12:02:14 | 74.0559 | 0.00256 | 5.7121 | 258.5691 | 284.8172 | 12.51051 | – |
| 2025 Jun 25 17:56 | 2025 Jun 22 12:02:14 | 74.0559 | 0.00256 | 5.7121 | 258.5691 | 284.8172 | 12.51051 | – |
| 2025 Jun 24 17:56 | 2025 Jun 22 12:02:14 | 74.0559 | 0.00256 | 5.7121 | 258.5691 | 284.8172 | 12.51051 | – |
| 2025 Jun 23 17:56 | 2025 Jun 22 12:02:14 | 74.0559 | 0.00256 | 5.7121 | 258.5691 | 284.8172 | 12.51051 | – |
| 2025 Jun 22 17:56 | 2025 Jun 16 14:02:00 | 74.0555 | 0.00256 | 6.2365 | 267.3168 | 284.8172 | 12.51051 | – |
| 2025 Jun 21 17:56 | 2025 Jun 16 14:02:00 | 74.0555 | 0.00256 | 6.2365 | 267.3168 | 284.8172 | 12.51051 | – |
| 2025 Jun 20 17:57 | 2025 Jun 16 14:02:00 | 74.0555 | 0.00256 | 6.2365 | 267.3168 | 284.8172 | 12.51051 | – |
| 2025 Jun 19 17:56 | 2025 Jun 16 14:02:00 | 74.0555 | 0.00256 | 6.2365 | 267.3168 | 284.8172 | 12.51051 | – |
| 2025 Jun 18 17:56 | 2025 Jun 16 14:02:00 | 74.0555 | 0.00256 | 6.2365 | 267.3168 | 284.8172 | 12.51051 | – |
| 2025 Jun 17 17:56 | 2025 Jun 16 14:02:00 | 74.0555 | 0.00256 | 6.2365 | 267.3168 | 284.8172 | 12.51051 | – |
| 2025 Jun 16 17:56 | 2025 Jun 12 06:17:25 | 74.0552 | 0.00257 | 6.6196 | 273.6711 | 284.8172 | 12.51051 | – |
| 2025 Jun 15 17:56 | 2025 Jun 12 06:17:25 | 74.0552 | 0.00257 | 6.6196 | 273.6711 | 284.8172 | 12.51051 | – |
| 2025 Jun 14 17:56 | 2025 Jun 12 06:17:25 | 74.0552 | 0.00257 | 6.6196 | 273.6711 | 284.8172 | 12.51051 | – |
| 2025 Jun 13 17:56 | 2025 Jun 12 06:17:25 | 74.0552 | 0.00257 | 6.6196 | 273.6711 | 284.8172 | 12.51051 | – |
| 2025 Jun 12 17:56 | 2025 Jun 12 06:17:25 | 74.0552 | 0.00257 | 6.6196 | 273.6711 | 284.8172 | 12.51051 | – |
| 2025 Jun 11 17:56 | 2025 Jun 05 20:05:57 | 74.0542 | 0.00257 | 7.1890 | 283.1388 | 284.8172 | 12.51051 | – |
| 2025 Jun 10 17:56 | 2025 Jun 05 20:05:57 | 74.0542 | 0.00257 | 7.1890 | 283.1388 | 284.8172 | 12.51051 | – |
| 2025 Jun 09 17:56 | 2025 Jun 05 20:05:57 | 74.0542 | 0.00257 | 7.1890 | 283.1388 | 284.8172 | 12.51051 | – |
| 2025 Jun 08 17:56 | 2025 Jun 05 20:05:57 | 74.0542 | 0.00257 | 7.1890 | 283.1388 | 284.8172 | 12.51051 | – |
| 2025 Jun 07 17:56 | 2025 Jun 05 20:05:57 | 74.0542 | 0.00257 | 7.1890 | 283.1388 | 284.8172 | 12.51051 | – |
| 2025 Jun 06 17:56 | 2025 Jun 05 20:05:57 | 74.0542 | 0.00257 | 7.1890 | 283.1388 | 284.8172 | 12.51051 | – |
| 2025 Jun 05 17:56 | 2025 Jun 01 15:10:27 | 74.0536 | 0.00257 | 7.5617 | 289.3505 | 284.8172 | 12.51051 | – |
| 2025 Jun 04 17:57 | 2025 Jun 01 15:10:27 | 74.0536 | 0.00257 | 7.5617 | 289.3505 | 284.8172 | 12.51051 | – |
| 2025 Jun 03 17:57 | 2025 Jun 01 15:10:27 | 74.0536 | 0.00257 | 7.5617 | 289.3505 | 284.8172 | 12.51051 | – |