Orbital elements of RADUGA 21
| Launched | 9 December 1987 |
| Flight ended | – |
| Launch site | Tyuratam Missile and Space Center, Kazakhstan (Also known as Baikonur Cosmodrome) |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 18631 |
| 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 Feb 05 18:58 | 2026 Feb 05 09:18:14 | 11.4940 | 0.00019 | 21.7460 | 299.1327 | 239.9785 | 1.00349 | 5.500 |
| 2026 Feb 04 18:57 | 2026 Feb 04 05:50:38 | 11.4956 | 0.00019 | 21.7465 | 298.6558 | 239.9785 | 1.00349 | 5.500 |
| 2026 Feb 03 18:56 | 2026 Feb 03 09:43:49 | 11.4968 | 0.00019 | 21.7469 | 298.2977 | 239.9785 | 1.00349 | 5.500 |
| 2026 Feb 02 18:56 | 2026 Feb 02 10:49:30 | 11.4981 | 0.00019 | 21.7474 | 297.9027 | 239.9785 | 1.00349 | 5.500 |
| 2026 Feb 01 18:56 | 2026 Feb 01 09:26:26 | 11.4996 | 0.00019 | 21.7479 | 297.6413 | 239.9785 | 1.00349 | 5.500 |
| 2026 Jan 31 18:56 | 2026 Jan 31 09:28:29 | 11.5010 | 0.00019 | 21.7484 | 297.4146 | 239.9785 | 1.00349 | 5.500 |
| 2026 Jan 30 18:57 | 2026 Jan 30 09:56:54 | 11.5024 | 0.00019 | 21.7488 | 297.3245 | 239.9785 | 1.00349 | 5.500 |
| 2026 Jan 29 18:56 | 2026 Jan 29 12:35:11 | 11.5037 | 0.00019 | 21.7493 | 297.2490 | 239.9785 | 1.00349 | 5.500 |
| 2026 Jan 28 18:56 | 2026 Jan 27 11:59:15 | 11.5065 | 0.00019 | 21.7503 | 297.0946 | 239.9785 | 1.00349 | 5.500 |
| 2026 Jan 27 18:56 | 2026 Jan 27 11:59:15 | 11.5065 | 0.00019 | 21.7503 | 297.0946 | 239.9785 | 1.00349 | 5.500 |
| 2026 Jan 26 18:57 | 2026 Jan 26 11:21:13 | 11.5080 | 0.00020 | 21.7508 | 296.9094 | 239.9785 | 1.00349 | 5.500 |
| 2026 Jan 25 18:57 | 2026 Jan 25 09:40:40 | 11.5095 | 0.00020 | 21.7513 | 296.6470 | 239.9785 | 1.00349 | 5.500 |
| 2026 Jan 24 18:58 | 2026 Jan 24 11:25:17 | 11.5109 | 0.00020 | 21.7517 | 296.4763 | 239.9785 | 1.00349 | 5.500 |