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 |
| 2025 Dec 24 18:56 | 2025 Dec 23 12:54:44 | 11.5578 | 0.00022 | 21.7668 | 281.2282 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 23 18:56 | 2025 Dec 23 02:11:19 | 11.5584 | 0.00022 | 21.7670 | 280.8813 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 22 18:57 | 2025 Dec 22 02:13:18 | 11.5599 | 0.00022 | 21.7674 | 280.3043 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 21 18:57 | 2025 Dec 21 12:29:01 | 11.5608 | 0.00023 | 21.7677 | 280.0081 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 20 18:57 | 2025 Dec 20 12:33:34 | 11.5623 | 0.00023 | 21.7681 | 279.2266 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 19 18:57 | 2025 Dec 19 02:18:59 | 11.5644 | 0.00023 | 21.7688 | 278.0303 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 18 18:57 | 2025 Dec 18 05:41:23 | 11.5657 | 0.00023 | 21.7692 | 277.3136 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 17 18:58 | 2025 Dec 17 02:22:33 | 11.5674 | 0.00023 | 21.7697 | 276.3860 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 16 18:57 | 2025 Dec 15 12:42:42 | 11.5698 | 0.00023 | 21.7704 | 275.2655 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 15 18:58 | 2025 Dec 14 12:44:27 | 11.5713 | 0.00023 | 21.7709 | 274.4399 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 14 18:56 | 2025 Dec 13 14:28:52 | 11.5727 | 0.00023 | 21.7713 | 273.7370 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 13 18:56 | 2025 Dec 13 07:47:58 | 11.5731 | 0.00023 | 21.7714 | 273.4576 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 12 18:57 | 2025 Dec 12 02:31:34 | 11.5749 | 0.00022 | 21.7720 | 272.5579 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 11 18:56 | 2025 Dec 11 02:33:25 | 11.5764 | 0.00022 | 21.7725 | 271.8723 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 10 18:56 | 2025 Dec 10 12:08:14 | 11.5773 | 0.00022 | 21.7727 | 271.5565 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 09 18:56 | 2025 Dec 09 13:10:46 | 11.5787 | 0.00022 | 21.7732 | 271.0238 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 08 18:56 | 2025 Dec 08 05:22:35 | 11.5806 | 0.00022 | 21.7738 | 270.6740 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 07 18:56 | 2025 Dec 07 02:40:32 | 11.5822 | 0.00022 | 21.7743 | 270.4101 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 06 18:56 | 2025 Dec 06 02:42:19 | 11.5836 | 0.00022 | 21.7748 | 270.2154 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 05 18:57 | 2025 Dec 05 02:44:06 | 11.5851 | 0.00022 | 21.7753 | 270.0801 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 04 18:57 | 2025 Dec 03 13:56:18 | 11.5873 | 0.00022 | 21.7760 | 269.6624 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 03 18:56 | 2025 Dec 03 02:47:30 | 11.5879 | 0.00022 | 21.7763 | 269.7418 | 257.4805 | 1.00334 | 5.500 |
| 2025 Dec 02 18:56 | 2025 Dec 02 02:49:18 | 11.5894 | 0.00022 | 21.7767 | 269.5637 | 257.4805 | 1.00334 | 5.500 |
| 2025 Nov 30 18:57 | 2025 Nov 30 02:52:44 | 11.5923 | 0.00022 | 21.7777 | 269.2201 | 257.4805 | 1.00334 | 5.500 |
| 2025 Nov 29 18:56 | 2025 Nov 29 02:54:22 | 11.5938 | 0.00022 | 21.7781 | 268.9184 | 257.4805 | 1.00334 | 5.500 |
| 2025 Nov 28 18:57 | 2025 Nov 28 02:56:08 | 11.5953 | 0.00023 | 21.7786 | 268.6192 | 257.4805 | 1.00334 | 5.500 |
| 2025 Nov 27 18:57 | 2025 Nov 27 02:57:47 | 11.5967 | 0.00023 | 21.7791 | 268.1914 | 257.4805 | 1.00334 | 5.500 |