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 Jul 03 17:57 | 2026 Jun 28 20:36:35 | 11.2893 | 0.00010 | 21.6801 | 298.4021 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jul 02 17:56 | 2026 Jun 28 20:36:35 | 11.2893 | 0.00010 | 21.6801 | 298.4021 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jul 01 17:56 | 2026 Jun 28 20:36:35 | 11.2893 | 0.00010 | 21.6801 | 298.4021 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 30 17:56 | 2026 Jun 28 20:36:35 | 11.2893 | 0.00010 | 21.6801 | 298.4021 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 29 17:57 | 2026 Jun 28 20:36:35 | 11.2893 | 0.00010 | 21.6801 | 298.4021 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 28 17:56 | 2026 Jun 22 12:00:02 | 11.2986 | 0.00009 | 21.6830 | 297.7917 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 27 17:55 | 2026 Jun 22 12:00:02 | 11.2986 | 0.00009 | 21.6830 | 297.7917 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 26 17:56 | 2026 Jun 22 12:00:02 | 11.2986 | 0.00009 | 21.6830 | 297.7917 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 25 17:56 | 2026 Jun 22 12:00:02 | 11.2986 | 0.00009 | 21.6830 | 297.7917 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 24 17:55 | 2026 Jun 22 12:00:02 | 11.2986 | 0.00009 | 21.6830 | 297.7917 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 23 17:56 | 2026 Jun 22 12:00:02 | 11.2986 | 0.00009 | 21.6830 | 297.7917 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 22 17:56 | 2026 Jun 16 09:56:00 | 11.3071 | 0.00008 | 21.6859 | 303.5847 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 21 17:57 | 2026 Jun 16 09:56:00 | 11.3071 | 0.00008 | 21.6859 | 303.5847 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 20 17:56 | 2026 Jun 16 09:56:00 | 11.3071 | 0.00008 | 21.6859 | 303.5847 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 19 17:57 | 2026 Jun 16 09:56:00 | 11.3071 | 0.00008 | 21.6859 | 303.5847 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 18 17:56 | 2026 Jun 16 09:56:00 | 11.3071 | 0.00008 | 21.6859 | 303.5847 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 17 17:57 | 2026 Jun 16 09:56:00 | 11.3071 | 0.00008 | 21.6859 | 303.5847 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 16 17:55 | 2026 Jun 11 23:04:56 | 11.3134 | 0.00009 | 21.6880 | 309.0868 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 15 17:56 | 2026 Jun 11 23:04:56 | 11.3134 | 0.00009 | 21.6880 | 309.0868 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 14 17:57 | 2026 Jun 11 23:04:56 | 11.3134 | 0.00009 | 21.6880 | 309.0868 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 13 17:56 | 2026 Jun 11 23:04:56 | 11.3134 | 0.00009 | 21.6880 | 309.0868 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 12 17:56 | 2026 Jun 11 23:04:56 | 11.3134 | 0.00009 | 21.6880 | 309.0868 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 11 17:57 | 2026 Jun 06 23:18:07 | 11.3207 | 0.00010 | 21.6904 | 311.5833 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 10 17:56 | 2026 Jun 06 23:18:07 | 11.3207 | 0.00010 | 21.6904 | 311.5833 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 09 17:57 | 2026 Jun 06 23:18:07 | 11.3207 | 0.00010 | 21.6904 | 311.5833 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 08 17:56 | 2026 Jun 06 23:18:07 | 11.3207 | 0.00010 | 21.6904 | 311.5833 | 237.3632 | 1.00354 | 5.500 |
| 2026 Jun 07 17:56 | 2026 Jun 06 23:18:07 | 11.3207 | 0.00010 | 21.6904 | 311.5833 | 237.3632 | 1.00354 | 5.500 |