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 Mar 17 18:56 | 2026 Mar 15 08:18:19 | 82.6134 | 0.00167 | 2.0926 | 131.5349 | 228.7181 | 12.64931 | – |
| 2026 Mar 16 18:57 | 2026 Mar 15 08:18:19 | 82.6134 | 0.00167 | 2.0926 | 131.5349 | 228.7181 | 12.64931 | – |
| 2026 Mar 15 18:56 | 2026 Mar 15 08:18:19 | 82.6134 | 0.00167 | 2.0926 | 131.5349 | 228.7181 | 12.64931 | – |
| 2026 Mar 14 18:56 | 2026 Mar 10 08:42:47 | 82.6124 | 0.00165 | 2.3046 | 142.4745 | 228.7181 | 12.64931 | – |
| 2026 Mar 13 18:57 | 2026 Mar 10 08:42:47 | 82.6124 | 0.00165 | 2.3046 | 142.4745 | 228.7181 | 12.64931 | – |
| 2026 Mar 12 18:57 | 2026 Mar 10 08:42:47 | 82.6124 | 0.00165 | 2.3046 | 142.4745 | 228.7181 | 12.64931 | – |
| 2026 Mar 11 18:56 | 2026 Mar 10 08:42:47 | 82.6124 | 0.00165 | 2.3046 | 142.4745 | 228.7181 | 12.64931 | – |
| 2026 Mar 10 18:56 | 2026 Mar 10 08:42:47 | 82.6124 | 0.00165 | 2.3046 | 142.4745 | 228.7181 | 12.64931 | – |
| 2026 Mar 09 18:56 | 2026 Mar 04 10:20:29 | 82.6112 | 0.00163 | 2.5571 | 155.6344 | 228.7181 | 12.64931 | – |
| 2026 Mar 08 18:57 | 2026 Mar 04 10:20:29 | 82.6112 | 0.00163 | 2.5571 | 155.6344 | 228.7181 | 12.64931 | – |
| 2026 Mar 07 18:57 | 2026 Mar 04 10:20:29 | 82.6112 | 0.00163 | 2.5571 | 155.6344 | 228.7181 | 12.64931 | – |
| 2026 Mar 06 18:56 | 2026 Mar 04 10:20:29 | 82.6112 | 0.00163 | 2.5571 | 155.6344 | 228.7181 | 12.64931 | – |
| 2026 Mar 05 18:56 | 2026 Mar 04 10:20:29 | 82.6112 | 0.00163 | 2.5571 | 155.6344 | 228.7181 | 12.64931 | – |
| 2026 Mar 04 18:57 | 2026 Mar 04 10:20:29 | 82.6112 | 0.00163 | 2.5571 | 155.6344 | 228.7181 | 12.64931 | – |
| 2026 Mar 03 18:56 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 228.7181 | 12.64931 | – |
| 2026 Mar 02 18:57 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 228.7181 | 12.64931 | – |
| 2026 Mar 01 18:57 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 228.7181 | 12.64931 | – |
| 2026 Feb 28 18:56 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 228.7181 | 12.64931 | – |
| 2026 Feb 27 19:05 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 228.7181 | 12.64931 | – |
| 2026 Feb 26 20:45 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 228.7181 | 12.64931 | – |