Orbital elements of COSMOS 2129
| Launched | 11 February 1991 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 21104 |
| 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 Apr 14 17:57 | 2026 Apr 13 06:49:28 | 74.0278 | 0.00246 | 19.0782 | 108.8434 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 13 17:57 | 2026 Apr 13 06:49:28 | 74.0278 | 0.00246 | 19.0782 | 108.8434 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 12 17:57 | 2026 Apr 08 15:12:18 | 74.0281 | 0.00246 | 19.4932 | 116.0447 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 11 17:57 | 2026 Apr 08 15:12:18 | 74.0281 | 0.00246 | 19.4932 | 116.0447 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 10 17:58 | 2026 Apr 08 15:12:18 | 74.0281 | 0.00246 | 19.4932 | 116.0447 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 09 18:01 | 2026 Apr 08 15:12:18 | 74.0281 | 0.00246 | 19.4932 | 116.0447 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 08 17:57 | 2026 Apr 08 15:12:18 | 74.0281 | 0.00246 | 19.4932 | 116.0447 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 07 17:57 | 2026 Apr 02 08:28:39 | 74.0287 | 0.00247 | 20.0536 | 125.7407 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 06 17:57 | 2026 Apr 02 08:28:39 | 74.0287 | 0.00247 | 20.0536 | 125.7407 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 05 17:56 | 2026 Apr 02 08:28:39 | 74.0287 | 0.00247 | 20.0536 | 125.7407 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 04 17:57 | 2026 Apr 02 08:28:39 | 74.0287 | 0.00247 | 20.0536 | 125.7407 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 03 17:56 | 2026 Apr 02 08:28:39 | 74.0287 | 0.00247 | 20.0536 | 125.7407 | 65.2048 | 12.53743 | 9.243 |
| 2026 Apr 02 18:03 | 2026 Apr 02 08:28:39 | 74.0287 | 0.00247 | 20.0536 | 125.7407 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 31 17:57 | 2026 Mar 26 07:40:50 | 74.0299 | 0.00247 | 20.6811 | 136.6005 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 30 17:58 | 2026 Mar 26 07:40:50 | 74.0299 | 0.00247 | 20.6811 | 136.6005 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 29 17:57 | 2026 Mar 26 07:40:50 | 74.0299 | 0.00247 | 20.6811 | 136.6005 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 28 18:57 | 2026 Mar 26 07:40:50 | 74.0299 | 0.00247 | 20.6811 | 136.6005 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 27 18:57 | 2026 Mar 26 07:40:50 | 74.0299 | 0.00247 | 20.6811 | 136.6005 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 26 18:57 | 2026 Mar 26 07:40:50 | 74.0299 | 0.00247 | 20.6811 | 136.6005 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 25 18:56 | 2026 Mar 20 09:55:41 | 74.0314 | 0.00248 | 21.2080 | 145.7207 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 24 18:56 | 2026 Mar 20 09:55:41 | 74.0314 | 0.00248 | 21.2080 | 145.7207 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 23 18:56 | 2026 Mar 20 09:55:41 | 74.0314 | 0.00248 | 21.2080 | 145.7207 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 22 18:56 | 2026 Mar 20 09:55:41 | 74.0314 | 0.00248 | 21.2080 | 145.7207 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 21 19:05 | 2026 Mar 20 09:55:41 | 74.0314 | 0.00248 | 21.2080 | 145.7207 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 20 18:57 | 2026 Mar 20 09:55:41 | 74.0314 | 0.00248 | 21.2080 | 145.7207 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 19 18:56 | 2026 Mar 15 14:31:50 | 74.0325 | 0.00248 | 21.6370 | 153.1512 | 65.2048 | 12.53743 | 9.243 |
| 2026 Mar 18 18:56 | 2026 Mar 15 14:31:50 | 74.0325 | 0.00248 | 21.6370 | 153.1512 | 65.2048 | 12.53743 | 9.243 |