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 |
| 2026 Jun 15 17:56 | 2026 Jun 12 04:04:38 | 82.6116 | 0.00150 | 22.3132 | 293.6238 | 66.3275 | 12.64934 | – |
| 2026 Jun 14 17:57 | 2026 Jun 12 04:04:38 | 82.6116 | 0.00150 | 22.3132 | 293.6238 | 66.3275 | 12.64934 | – |
| 2026 Jun 13 17:56 | 2026 Jun 12 04:04:38 | 82.6116 | 0.00150 | 22.3132 | 293.6238 | 66.3275 | 12.64934 | – |
| 2026 Jun 12 17:56 | 2026 Jun 12 04:04:38 | 82.6116 | 0.00150 | 22.3132 | 293.6238 | 66.3275 | 12.64934 | – |
| 2026 Jun 11 17:57 | 2026 Jun 07 04:29:07 | 82.6116 | 0.00151 | 22.5253 | 305.8383 | 66.3275 | 12.64934 | – |
| 2026 Jun 10 17:56 | 2026 Jun 07 04:29:07 | 82.6116 | 0.00151 | 22.5253 | 305.8383 | 66.3275 | 12.64934 | – |
| 2026 Jun 09 17:57 | 2026 Jun 07 04:29:07 | 82.6116 | 0.00151 | 22.5253 | 305.8383 | 66.3275 | 12.64934 | – |
| 2026 Jun 08 17:56 | 2026 Jun 07 04:29:07 | 82.6116 | 0.00151 | 22.5253 | 305.8383 | 66.3275 | 12.64934 | – |
| 2026 Jun 07 17:56 | 2026 Jun 07 04:29:07 | 82.6116 | 0.00151 | 22.5253 | 305.8383 | 66.3275 | 12.64934 | – |
| 2026 Jun 06 17:56 | 2026 May 31 11:07:54 | 82.6116 | 0.00154 | 22.8115 | 322.0105 | 66.3275 | 12.64934 | – |
| 2026 Jun 05 17:56 | 2026 May 31 11:07:54 | 82.6116 | 0.00154 | 22.8115 | 322.0105 | 66.3275 | 12.64934 | – |
| 2026 Jun 04 17:57 | 2026 May 31 11:07:54 | 82.6116 | 0.00154 | 22.8115 | 322.0105 | 66.3275 | 12.64934 | – |
| 2026 Jun 02 17:56 | 2026 May 31 11:07:54 | 82.6116 | 0.00154 | 22.8115 | 322.0105 | 66.3275 | 12.64934 | – |
| 2026 Jun 01 17:57 | 2026 May 31 11:07:54 | 82.6116 | 0.00154 | 22.8115 | 322.0105 | 66.3275 | 12.64934 | – |
| 2026 May 31 17:58 | 2026 May 31 11:07:54 | 82.6116 | 0.00154 | 22.8115 | 322.0105 | 66.3275 | 12.64934 | – |
| 2026 May 30 17:57 | 2026 May 26 05:50:42 | 82.6119 | 0.00156 | 23.0337 | 334.4140 | 66.3275 | 12.64934 | – |
| 2026 May 29 17:57 | 2026 May 26 05:50:42 | 82.6119 | 0.00156 | 23.0337 | 334.4140 | 66.3275 | 12.64934 | – |
| 2026 May 28 17:56 | 2026 May 26 05:50:42 | 82.6119 | 0.00156 | 23.0337 | 334.4140 | 66.3275 | 12.64934 | – |
| 2026 May 27 17:57 | 2026 May 26 05:50:42 | 82.6119 | 0.00156 | 23.0337 | 334.4140 | 66.3275 | 12.64934 | – |
| 2026 May 26 17:57 | 2026 May 26 05:50:42 | 82.6119 | 0.00156 | 23.0337 | 334.4140 | 66.3275 | 12.64934 | – |
| 2026 May 25 17:57 | 2026 May 21 13:50:47 | 82.6123 | 0.00158 | 23.2324 | 345.2961 | 66.3275 | 12.64934 | – |
| 2026 May 24 17:57 | 2026 May 21 13:50:47 | 82.6123 | 0.00158 | 23.2324 | 345.2961 | 66.3275 | 12.64934 | – |
| 2026 May 23 17:58 | 2026 May 21 13:50:47 | 82.6123 | 0.00158 | 23.2324 | 345.2961 | 66.3275 | 12.64934 | – |
| 2026 May 22 17:57 | 2026 May 21 13:50:47 | 82.6123 | 0.00158 | 23.2324 | 345.2961 | 66.3275 | 12.64934 | – |
| 2026 May 21 17:57 | 2026 May 21 13:50:47 | 82.6123 | 0.00158 | 23.2324 | 345.2961 | 66.3275 | 12.64934 | – |
| 2026 May 20 17:57 | 2026 May 16 14:15:17 | 82.6128 | 0.00160 | 23.4445 | 356.7672 | 66.3275 | 12.64934 | – |
| 2026 May 19 17:58 | 2026 May 16 14:15:17 | 82.6128 | 0.00160 | 23.4445 | 356.7672 | 66.3275 | 12.64934 | – |