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 Jan 04 18:56 | 2026 Jan 04 03:13:32 | 11.5408 | 0.00021 | 21.7613 | 284.0060 | 123.5791 | 1.00338 | 5.500 |
| 2026 Jan 03 18:57 | 2026 Jan 03 10:37:55 | 11.5418 | 0.00021 | 21.7616 | 283.7146 | 123.5791 | 1.00338 | 5.500 |
| 2026 Jan 01 18:56 | 2026 Jan 01 00:11:42 | 11.5453 | 0.00021 | 21.7628 | 283.5469 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 31 18:57 | 2025 Dec 31 12:32:21 | 11.5460 | 0.00021 | 21.7630 | 283.2531 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 30 18:56 | 2025 Dec 30 00:15:26 | 11.5482 | 0.00021 | 21.7637 | 283.5523 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 29 18:56 | 2025 Dec 29 00:17:21 | 11.5497 | 0.00021 | 21.7642 | 283.3887 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 28 18:57 | 2025 Dec 28 12:18:15 | 11.5504 | 0.00021 | 21.7644 | 283.0264 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 27 18:57 | 2025 Dec 27 00:21:10 | 11.5526 | 0.00022 | 21.7652 | 282.8704 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 26 18:56 | 2025 Dec 26 12:10:24 | 11.5534 | 0.00022 | 21.7654 | 282.5093 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 25 18:57 | 2025 Dec 25 03:54:45 | 11.5554 | 0.00022 | 21.7660 | 281.8800 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 24 18:56 | 2025 Dec 23 12:54:44 | 11.5578 | 0.00022 | 21.7668 | 281.2282 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 23 18:56 | 2025 Dec 23 02:11:19 | 11.5584 | 0.00022 | 21.7670 | 280.8813 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 22 18:57 | 2025 Dec 22 02:13:18 | 11.5599 | 0.00022 | 21.7674 | 280.3043 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 21 18:57 | 2025 Dec 21 12:29:01 | 11.5608 | 0.00023 | 21.7677 | 280.0081 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 20 18:57 | 2025 Dec 20 12:33:34 | 11.5623 | 0.00023 | 21.7681 | 279.2266 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 19 18:57 | 2025 Dec 19 02:18:59 | 11.5644 | 0.00023 | 21.7688 | 278.0303 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 18 18:57 | 2025 Dec 18 05:41:23 | 11.5657 | 0.00023 | 21.7692 | 277.3136 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 17 18:58 | 2025 Dec 17 02:22:33 | 11.5674 | 0.00023 | 21.7697 | 276.3860 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 16 18:57 | 2025 Dec 15 12:42:42 | 11.5698 | 0.00023 | 21.7704 | 275.2655 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 15 18:58 | 2025 Dec 14 12:44:27 | 11.5713 | 0.00023 | 21.7709 | 274.4399 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 14 18:56 | 2025 Dec 13 14:28:52 | 11.5727 | 0.00023 | 21.7713 | 273.7370 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 13 18:56 | 2025 Dec 13 07:47:58 | 11.5731 | 0.00023 | 21.7714 | 273.4576 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 12 18:57 | 2025 Dec 12 02:31:34 | 11.5749 | 0.00022 | 21.7720 | 272.5579 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 11 18:56 | 2025 Dec 11 02:33:25 | 11.5764 | 0.00022 | 21.7725 | 271.8723 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 10 18:56 | 2025 Dec 10 12:08:14 | 11.5773 | 0.00022 | 21.7727 | 271.5565 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 09 18:56 | 2025 Dec 09 13:10:46 | 11.5787 | 0.00022 | 21.7732 | 271.0238 | 123.5791 | 1.00338 | 5.500 |
| 2025 Dec 08 18:56 | 2025 Dec 08 05:22:35 | 11.5806 | 0.00022 | 21.7738 | 270.6740 | 123.5791 | 1.00338 | 5.500 |