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 May 10 17:56 | 2025 May 09 06:59:27 | 82.6130 | 0.00172 | 15.2864 | 120.7137 | 239.5655 | 12.64921 | – |
| 2025 May 09 17:57 | 2025 May 09 06:59:27 | 82.6130 | 0.00172 | 15.2864 | 120.7137 | 239.5655 | 12.64921 | – |
| 2025 May 08 17:56 | 2025 May 03 14:18:46 | 82.6126 | 0.00171 | 15.5287 | 132.8875 | 239.5655 | 12.64921 | – |
| 2025 May 07 17:56 | 2025 May 03 14:18:46 | 82.6126 | 0.00171 | 15.5287 | 132.8875 | 239.5655 | 12.64921 | – |
| 2025 May 06 17:57 | 2025 May 03 14:18:46 | 82.6126 | 0.00171 | 15.5287 | 132.8875 | 239.5655 | 12.64921 | – |
| 2025 May 05 17:56 | 2025 May 03 14:18:46 | 82.6126 | 0.00171 | 15.5287 | 132.8875 | 239.5655 | 12.64921 | – |
| 2025 May 04 17:57 | 2025 May 03 14:18:46 | 82.6126 | 0.00171 | 15.5287 | 132.8875 | 239.5655 | 12.64921 | – |
| 2025 May 03 17:57 | 2025 May 03 14:18:46 | 82.6126 | 0.00171 | 15.5287 | 132.8875 | 239.5655 | 12.64921 | – |
| 2025 May 01 17:56 | 2025 Apr 22 10:39:07 | 82.6111 | 0.00167 | 16.0032 | 157.1037 | 239.5655 | 12.64921 | – |
| 2025 Apr 30 17:56 | 2025 Apr 22 10:39:07 | 82.6111 | 0.00167 | 16.0032 | 157.1037 | 239.5655 | 12.64921 | – |
| 2025 Apr 29 17:57 | 2025 Apr 22 10:39:07 | 82.6111 | 0.00167 | 16.0032 | 157.1037 | 239.5655 | 12.64921 | – |
| 2025 Apr 27 17:56 | 2025 Apr 22 10:39:07 | 82.6111 | 0.00167 | 16.0032 | 157.1037 | 239.5655 | 12.64921 | – |
| 2025 Apr 26 17:57 | 2025 Apr 22 10:39:07 | 82.6111 | 0.00167 | 16.0032 | 157.1037 | 239.5655 | 12.64921 | – |
| 2025 Apr 25 17:56 | 2025 Apr 22 10:39:07 | 82.6111 | 0.00167 | 16.0032 | 157.1037 | 239.5655 | 12.64921 | – |
| 2025 Apr 24 17:56 | 2025 Apr 22 10:39:07 | 82.6111 | 0.00167 | 16.0032 | 157.1037 | 239.5655 | 12.64921 | – |
| 2025 Apr 23 17:57 | 2025 Apr 22 10:39:07 | 82.6111 | 0.00167 | 16.0032 | 157.1037 | 239.5655 | 12.64921 | – |
| 2025 Apr 22 17:56 | 2025 Apr 22 10:39:07 | 82.6111 | 0.00167 | 16.0032 | 157.1037 | 239.5655 | 12.64921 | – |
| 2025 Apr 21 17:57 | 2025 Apr 15 21:05:33 | 82.6099 | 0.00165 | 16.2826 | 171.6528 | 239.5655 | 12.64921 | – |
| 2025 Apr 20 17:56 | 2025 Apr 15 21:05:33 | 82.6099 | 0.00165 | 16.2826 | 171.6528 | 239.5655 | 12.64921 | – |
| 2025 Apr 19 17:56 | 2025 Apr 15 21:05:33 | 82.6099 | 0.00165 | 16.2826 | 171.6528 | 239.5655 | 12.64921 | – |
| 2025 Apr 18 17:57 | 2025 Apr 15 21:05:33 | 82.6099 | 0.00165 | 16.2826 | 171.6528 | 239.5655 | 12.64921 | – |
| 2025 Apr 17 17:56 | 2025 Apr 15 21:05:33 | 82.6099 | 0.00165 | 16.2826 | 171.6528 | 239.5655 | 12.64921 | – |
| 2025 Apr 16 17:57 | 2025 Apr 15 21:05:33 | 82.6099 | 0.00165 | 16.2826 | 171.6528 | 239.5655 | 12.64921 | – |
| 2025 Apr 15 17:56 | 2025 Apr 11 08:53:20 | 82.6091 | 0.00162 | 16.4745 | 181.7676 | 239.5655 | 12.64921 | – |
| 2025 Apr 14 17:56 | 2025 Apr 11 08:53:20 | 82.6091 | 0.00162 | 16.4745 | 181.7676 | 239.5655 | 12.64921 | – |