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 Aug 14 17:56 | 2026 Aug 13 04:19:51 | 82.6119 | 0.00169 | 19.6744 | 147.9189 | 212.2934 | 12.64935 | – |
| 2026 Aug 13 17:57 | 2026 Aug 13 04:19:51 | 82.6119 | 0.00169 | 19.6744 | 147.9189 | 212.2934 | 12.64935 | – |
| 2026 Aug 12 17:56 | 2026 Aug 07 05:57:34 | 82.6129 | 0.00166 | 19.9268 | 160.9078 | 212.2934 | 12.64935 | – |
| 2026 Aug 11 17:56 | 2026 Aug 07 05:57:34 | 82.6129 | 0.00166 | 19.9268 | 160.9078 | 212.2934 | 12.64935 | – |
| 2026 Aug 10 17:56 | 2026 Aug 07 05:57:34 | 82.6129 | 0.00166 | 19.9268 | 160.9078 | 212.2934 | 12.64935 | – |
| 2026 Aug 09 17:57 | 2026 Aug 07 05:57:34 | 82.6129 | 0.00166 | 19.9268 | 160.9078 | 212.2934 | 12.64935 | – |
| 2026 Aug 08 17:57 | 2026 Aug 07 05:57:34 | 82.6129 | 0.00166 | 19.9268 | 160.9078 | 212.2934 | 12.64935 | – |
| 2026 Aug 07 17:57 | 2026 Aug 07 05:57:34 | 82.6129 | 0.00166 | 19.9268 | 160.9078 | 212.2934 | 12.64935 | – |
| 2026 Aug 06 17:57 | 2026 Aug 01 07:35:18 | 82.6137 | 0.00164 | 20.1792 | 174.1262 | 212.2934 | 12.64935 | – |
| 2026 Aug 05 17:56 | 2026 Aug 01 07:35:18 | 82.6137 | 0.00164 | 20.1792 | 174.1262 | 212.2934 | 12.64935 | – |
| 2026 Aug 04 17:57 | 2026 Aug 01 07:35:18 | 82.6137 | 0.00164 | 20.1792 | 174.1262 | 212.2934 | 12.64935 | – |
| 2026 Aug 03 17:56 | 2026 Aug 01 07:35:18 | 82.6137 | 0.00164 | 20.1792 | 174.1262 | 212.2934 | 12.64935 | – |
| 2026 Aug 02 17:57 | 2026 Aug 01 07:35:18 | 82.6137 | 0.00164 | 20.1792 | 174.1262 | 212.2934 | 12.64935 | – |
| 2026 Aug 01 17:57 | 2026 Aug 01 07:35:18 | 82.6137 | 0.00164 | 20.1792 | 174.1262 | 212.2934 | 12.64935 | – |
| 2026 Jul 31 17:56 | 2026 Jul 27 06:05:53 | 82.6140 | 0.00161 | 20.3946 | 185.5128 | 212.2934 | 12.64935 | – |
| 2026 Jul 30 17:57 | 2026 Jul 27 06:05:53 | 82.6140 | 0.00161 | 20.3946 | 185.5128 | 212.2934 | 12.64935 | – |
| 2026 Jul 29 17:57 | 2026 Jul 27 06:05:53 | 82.6140 | 0.00161 | 20.3946 | 185.5128 | 212.2934 | 12.64935 | – |
| 2026 Jul 28 17:57 | 2026 Jul 27 06:05:53 | 82.6140 | 0.00161 | 20.3946 | 185.5128 | 212.2934 | 12.64935 | – |
| 2026 Jul 27 17:57 | 2026 Jul 27 06:05:53 | 82.6140 | 0.00161 | 20.3946 | 185.5128 | 212.2934 | 12.64935 | – |
| 2026 Jul 26 17:56 | 2026 Jul 21 05:49:43 | 82.6142 | 0.00159 | 20.6503 | 199.2589 | 212.2934 | 12.64935 | – |
| 2026 Jul 25 17:57 | 2026 Jul 21 05:49:43 | 82.6142 | 0.00159 | 20.6503 | 199.2589 | 212.2934 | 12.64935 | – |
| 2026 Jul 24 17:56 | 2026 Jul 21 05:49:43 | 82.6142 | 0.00159 | 20.6503 | 199.2589 | 212.2934 | 12.64935 | – |
| 2026 Jul 23 17:57 | 2026 Jul 21 05:49:43 | 82.6142 | 0.00159 | 20.6503 | 199.2589 | 212.2934 | 12.64935 | – |
| 2026 Jul 22 17:57 | 2026 Jul 21 05:49:43 | 82.6142 | 0.00159 | 20.6503 | 199.2589 | 212.2934 | 12.64935 | – |
| 2026 Jul 21 17:57 | 2026 Jul 21 05:49:43 | 82.6142 | 0.00159 | 20.6503 | 199.2589 | 212.2934 | 12.64935 | – |
| 2026 Jul 20 17:57 | 2026 Jul 16 06:14:12 | 82.6141 | 0.00156 | 20.8623 | 210.8080 | 212.2934 | 12.64935 | – |
| 2026 Jul 19 19:06 | 2026 Jul 16 06:14:12 | 82.6141 | 0.00156 | 20.8623 | 210.8080 | 212.2934 | 12.64935 | – |
| 2026 Jul 19 17:57 | 2026 Jul 16 06:14:12 | 82.6141 | 0.00156 | 20.8623 | 210.8080 | 212.2934 | 12.64935 | – |
| 2026 Jul 18 17:57 | 2026 Jul 16 06:14:12 | 82.6141 | 0.00156 | 20.8623 | 210.8080 | 212.2934 | 12.64935 | – |