Orbital elements of COSMOS 1998
| Launched | 9 February 1989 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 19789 |
| 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 Oct 18 17:56 | 2025 Oct 18 06:42:26 | 82.6073 | 0.00168 | 8.3956 | 111.0520 | 249.2367 | 12.64925 | – |
| 2025 Oct 17 17:56 | 2025 Oct 07 06:50:38 | 82.6091 | 0.00165 | 8.8635 | 134.7366 | 249.2367 | 12.64925 | – |
| 2025 Oct 16 17:56 | 2025 Oct 07 06:50:38 | 82.6091 | 0.00165 | 8.8635 | 134.7366 | 249.2367 | 12.64925 | – |
| 2025 Oct 15 17:56 | 2025 Oct 07 06:50:38 | 82.6091 | 0.00165 | 8.8635 | 134.7366 | 249.2367 | 12.64925 | – |
| 2025 Oct 14 17:56 | 2025 Oct 07 06:50:38 | 82.6091 | 0.00165 | 8.8635 | 134.7366 | 249.2367 | 12.64925 | – |
| 2025 Oct 12 17:56 | 2025 Oct 07 06:50:38 | 82.6091 | 0.00165 | 8.8635 | 134.7366 | 249.2367 | 12.64925 | – |
| 2025 Oct 11 17:57 | 2025 Oct 07 06:50:38 | 82.6091 | 0.00165 | 8.8635 | 134.7366 | 249.2367 | 12.64925 | – |
| 2025 Oct 09 17:56 | 2025 Oct 07 06:50:38 | 82.6091 | 0.00165 | 8.8635 | 134.7366 | 249.2367 | 12.64925 | – |
| 2025 Oct 08 17:56 | 2025 Oct 07 06:50:38 | 82.6091 | 0.00165 | 8.8635 | 134.7366 | 249.2367 | 12.64925 | – |
| 2025 Oct 07 17:56 | 2025 Oct 07 06:50:38 | 82.6091 | 0.00165 | 8.8635 | 134.7366 | 249.2367 | 12.64925 | – |
| 2025 Oct 05 17:56 | 2025 Sep 26 03:11:02 | 82.6115 | 0.00160 | 9.3381 | 159.5224 | 249.2367 | 12.64925 | – |
| 2025 Oct 04 17:57 | 2025 Sep 26 03:11:02 | 82.6115 | 0.00160 | 9.3381 | 159.5224 | 249.2367 | 12.64925 | – |
| 2025 Oct 03 17:57 | 2025 Sep 26 03:11:02 | 82.6115 | 0.00160 | 9.3381 | 159.5224 | 249.2367 | 12.64925 | – |
| 2025 Oct 02 17:56 | 2025 Sep 26 03:11:02 | 82.6115 | 0.00160 | 9.3381 | 159.5224 | 249.2367 | 12.64925 | – |
| 2025 Sep 30 17:56 | 2025 Sep 26 03:11:02 | 82.6115 | 0.00160 | 9.3381 | 159.5224 | 249.2367 | 12.64925 | – |
| 2025 Sep 29 17:56 | 2025 Sep 26 03:11:02 | 82.6115 | 0.00160 | 9.3381 | 159.5224 | 249.2367 | 12.64925 | – |
| 2025 Sep 28 17:56 | 2025 Sep 26 03:11:02 | 82.6115 | 0.00160 | 9.3381 | 159.5224 | 249.2367 | 12.64925 | – |
| 2025 Sep 27 17:56 | 2025 Sep 26 03:11:02 | 82.6115 | 0.00160 | 9.3381 | 159.5224 | 249.2367 | 12.64925 | – |
| 2025 Sep 26 17:56 | 2025 Sep 26 03:11:02 | 82.6115 | 0.00160 | 9.3381 | 159.5224 | 249.2367 | 12.64925 | – |
| 2025 Sep 25 17:56 | 2025 Sep 20 02:54:47 | 82.6124 | 0.00158 | 9.5939 | 173.1310 | 249.2367 | 12.64925 | – |
| 2025 Sep 24 17:56 | 2025 Sep 20 02:54:47 | 82.6124 | 0.00158 | 9.5939 | 173.1310 | 249.2367 | 12.64925 | – |