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 Sep 15 17:56 | 2025 Sep 15 03:19:12 | 82.6135 | 0.00155 | 9.8058 | 184.6019 | 175.4934 | 12.64924 | – |
| 2025 Sep 12 17:57 | 2025 Sep 03 04:40:36 | 82.6151 | 0.00151 | 10.3138 | 212.7789 | 175.4934 | 12.64924 | – |
| 2025 Sep 11 17:57 | 2025 Sep 03 04:40:36 | 82.6151 | 0.00151 | 10.3138 | 212.7789 | 175.4934 | 12.64924 | – |
| 2025 Sep 10 17:56 | 2025 Sep 03 04:40:36 | 82.6151 | 0.00151 | 10.3138 | 212.7789 | 175.4934 | 12.64924 | – |
| 2025 Sep 08 17:57 | 2025 Sep 03 04:40:36 | 82.6151 | 0.00151 | 10.3138 | 212.7789 | 175.4934 | 12.64924 | – |
| 2025 Sep 07 17:56 | 2025 Sep 03 04:40:36 | 82.6151 | 0.00151 | 10.3138 | 212.7789 | 175.4934 | 12.64924 | – |
| 2025 Sep 06 20:41 | 2025 Sep 03 04:40:36 | 82.6151 | 0.00151 | 10.3138 | 212.7789 | 175.4934 | 12.64924 | – |
| 2025 Sep 03 17:57 | 2025 Sep 03 04:40:36 | 82.6151 | 0.00151 | 10.3138 | 212.7789 | 175.4934 | 12.64924 | – |
| 2025 Sep 02 17:56 | 2025 Aug 27 20:48:45 | 82.6152 | 0.00149 | 10.5829 | 227.9391 | 175.4934 | 12.64924 | – |
| 2025 Sep 01 17:56 | 2025 Aug 27 20:48:45 | 82.6152 | 0.00149 | 10.5829 | 227.9391 | 175.4934 | 12.64924 | – |
| 2025 Aug 31 17:56 | 2025 Aug 27 20:48:45 | 82.6152 | 0.00149 | 10.5829 | 227.9391 | 175.4934 | 12.64924 | – |
| 2025 Aug 30 17:56 | 2025 Aug 27 20:48:45 | 82.6152 | 0.00149 | 10.5829 | 227.9391 | 175.4934 | 12.64924 | – |
| 2025 Aug 29 17:56 | 2025 Aug 27 20:48:45 | 82.6152 | 0.00149 | 10.5829 | 227.9391 | 175.4934 | 12.64924 | – |
| 2025 Aug 28 17:57 | 2025 Aug 27 20:48:45 | 82.6152 | 0.00149 | 10.5829 | 227.9391 | 175.4934 | 12.64924 | – |
| 2025 Aug 27 17:56 | 2025 Aug 20 21:45:44 | 82.6150 | 0.00147 | 10.8788 | 244.8653 | 175.4934 | 12.64924 | – |
| 2025 Aug 26 17:56 | 2025 Aug 20 21:45:44 | 82.6150 | 0.00147 | 10.8788 | 244.8653 | 175.4934 | 12.64924 | – |
| 2025 Aug 25 17:56 | 2025 Aug 20 21:45:44 | 82.6150 | 0.00147 | 10.8788 | 244.8653 | 175.4934 | 12.64924 | – |
| 2025 Aug 24 17:56 | 2025 Aug 20 21:45:44 | 82.6150 | 0.00147 | 10.8788 | 244.8653 | 175.4934 | 12.64924 | – |
| 2025 Aug 23 17:56 | 2025 Aug 20 21:45:44 | 82.6150 | 0.00147 | 10.8788 | 244.8653 | 175.4934 | 12.64924 | – |
| 2025 Aug 22 17:56 | 2025 Aug 17 21:37:36 | 82.6149 | 0.00147 | 11.0066 | 252.2275 | 175.4934 | 12.64924 | – |
| 2025 Aug 20 17:56 | 2025 Aug 17 21:37:36 | 82.6149 | 0.00147 | 11.0066 | 252.2275 | 175.4934 | 12.64924 | – |
| 2025 Aug 19 17:56 | 2025 Aug 17 21:37:36 | 82.6149 | 0.00147 | 11.0066 | 252.2275 | 175.4934 | 12.64924 | – |