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 May 16 17:56 | 2026 May 16 14:15:17 | 82.6128 | 0.00160 | 23.4445 | 356.7672 | 3.3314 | 12.64933 | – |
| 2026 May 15 17:57 | 2026 May 10 08:17:26 | 82.6137 | 0.00163 | 23.7104 | 10.7501 | 3.3314 | 12.64933 | – |
| 2026 May 14 17:58 | 2026 May 10 08:17:26 | 82.6137 | 0.00163 | 23.7104 | 10.7501 | 3.3314 | 12.64933 | – |
| 2026 May 13 17:58 | 2026 May 10 08:17:26 | 82.6137 | 0.00163 | 23.7104 | 10.7501 | 3.3314 | 12.64933 | – |
| 2026 May 12 17:58 | 2026 May 10 08:17:26 | 82.6137 | 0.00163 | 23.7104 | 10.7501 | 3.3314 | 12.64933 | – |
| 2026 May 11 17:56 | 2026 May 10 08:17:26 | 82.6137 | 0.00163 | 23.7104 | 10.7501 | 3.3314 | 12.64933 | – |
| 2026 May 10 17:57 | 2026 May 10 08:17:26 | 82.6137 | 0.00163 | 23.7104 | 10.7501 | 3.3314 | 12.64933 | – |
| 2026 May 09 17:57 | 2026 May 05 08:41:56 | 82.6144 | 0.00166 | 23.9224 | 21.8362 | 3.3314 | 12.64933 | – |
| 2026 May 08 17:57 | 2026 May 05 08:41:56 | 82.6144 | 0.00166 | 23.9224 | 21.8362 | 3.3314 | 12.64933 | – |
| 2026 May 07 17:58 | 2026 May 05 08:41:56 | 82.6144 | 0.00166 | 23.9224 | 21.8362 | 3.3314 | 12.64933 | – |
| 2026 May 06 17:57 | 2026 May 05 08:41:56 | 82.6144 | 0.00166 | 23.9224 | 21.8362 | 3.3314 | 12.64933 | – |
| 2026 May 05 17:57 | 2026 May 05 08:41:56 | 82.6144 | 0.00166 | 23.9224 | 21.8362 | 3.3314 | 12.64933 | – |
| 2026 May 04 17:57 | 2026 Apr 30 14:48:07 | 82.6152 | 0.00167 | 0.1243 | 32.1402 | 3.3314 | 12.64933 | – |
| 2026 May 03 17:57 | 2026 Apr 30 14:48:07 | 82.6152 | 0.00167 | 0.1243 | 32.1402 | 3.3314 | 12.64933 | – |
| 2026 May 02 17:57 | 2026 Apr 30 14:48:07 | 82.6152 | 0.00167 | 0.1243 | 32.1402 | 3.3314 | 12.64933 | – |
| 2026 May 01 17:56 | 2026 Apr 30 14:48:07 | 82.6152 | 0.00167 | 0.1243 | 32.1402 | 3.3314 | 12.64933 | – |
| 2026 Apr 30 17:56 | 2026 Apr 30 14:48:07 | 82.6152 | 0.00167 | 0.1243 | 32.1402 | 3.3314 | 12.64933 | – |
| 2026 Apr 29 17:57 | 2026 Apr 24 05:02:28 | 82.6159 | 0.00169 | 0.3969 | 46.0148 | 3.3314 | 12.64933 | – |
| 2026 Apr 28 17:56 | 2026 Apr 24 05:02:28 | 82.6159 | 0.00169 | 0.3969 | 46.0148 | 3.3314 | 12.64933 | – |
| 2026 Apr 27 17:58 | 2026 Apr 24 05:02:28 | 82.6159 | 0.00169 | 0.3969 | 46.0148 | 3.3314 | 12.64933 | – |
| 2026 Apr 26 17:58 | 2026 Apr 24 05:02:28 | 82.6159 | 0.00169 | 0.3969 | 46.0148 | 3.3314 | 12.64933 | – |
| 2026 Apr 25 17:58 | 2026 Apr 24 05:02:28 | 82.6159 | 0.00169 | 0.3969 | 46.0148 | 3.3314 | 12.64933 | – |
| 2026 Apr 24 17:59 | 2026 Apr 24 05:02:28 | 82.6159 | 0.00169 | 0.3969 | 46.0148 | 3.3314 | 12.64933 | – |
| 2026 Apr 23 17:57 | 2026 Apr 19 11:08:39 | 82.6163 | 0.00171 | 0.5988 | 56.2351 | 3.3314 | 12.64933 | – |
| 2026 Apr 22 17:57 | 2026 Apr 19 11:08:39 | 82.6163 | 0.00171 | 0.5988 | 56.2351 | 3.3314 | 12.64933 | – |
| 2026 Apr 21 17:57 | 2026 Apr 19 11:08:39 | 82.6163 | 0.00171 | 0.5988 | 56.2351 | 3.3314 | 12.64933 | – |
| 2026 Apr 20 17:57 | 2026 Apr 19 11:08:39 | 82.6163 | 0.00171 | 0.5988 | 56.2351 | 3.3314 | 12.64933 | – |
| 2026 Apr 19 17:58 | 2026 Apr 19 11:08:39 | 82.6163 | 0.00171 | 0.5988 | 56.2351 | 3.3314 | 12.64933 | – |