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 02 18:57 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 191.0536 | 12.64931 | – |
| 2026 Mar 01 18:57 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 191.0536 | 12.64931 | – |
| 2026 Feb 28 18:56 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 191.0536 | 12.64931 | – |
| 2026 Feb 27 19:05 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 191.0536 | 12.64931 | – |
| 2026 Feb 26 20:45 | 2026 Feb 26 10:04:17 | 82.6097 | 0.00161 | 2.8130 | 169.0909 | 191.0536 | 12.64931 | – |
| 2026 Feb 05 18:58 | 2026 Feb 02 10:53:23 | 82.6077 | 0.00152 | 3.8336 | 224.7522 | 191.0536 | 12.64931 | – |
| 2026 Feb 04 18:57 | 2026 Feb 02 10:53:23 | 82.6077 | 0.00152 | 3.8336 | 224.7522 | 191.0536 | 12.64931 | – |
| 2026 Feb 03 18:56 | 2026 Feb 02 10:53:23 | 82.6077 | 0.00152 | 3.8336 | 224.7522 | 191.0536 | 12.64931 | – |