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 Jul 01 17:56 | 2025 Jun 30 12:21:40 | 11.8089 | 0.00016 | 21.8504 | 198.2809 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 30 17:56 | 2025 Jun 30 05:26:10 | 11.8093 | 0.00016 | 21.8505 | 197.9042 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 29 17:56 | 2025 Jun 28 14:37:52 | 11.8116 | 0.00016 | 21.8513 | 196.7078 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 28 17:56 | 2025 Jun 28 02:38:14 | 11.8123 | 0.00016 | 21.8516 | 196.3116 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 27 17:56 | 2025 Jun 26 14:39:40 | 11.8144 | 0.00015 | 21.8523 | 195.3900 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 26 17:56 | 2025 Jun 26 02:29:38 | 11.8151 | 0.00015 | 21.8526 | 195.0699 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 25 17:56 | 2025 Jun 24 12:58:46 | 11.8173 | 0.00015 | 21.8534 | 194.5571 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 24 17:56 | 2025 Jun 23 14:42:36 | 11.8187 | 0.00015 | 21.8539 | 194.3230 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 23 17:56 | 2025 Jun 22 10:16:47 | 11.8203 | 0.00015 | 21.8545 | 194.3855 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 22 17:56 | 2025 Jun 21 14:44:13 | 11.8215 | 0.00014 | 21.8549 | 194.3076 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 21 17:56 | 2025 Jun 21 11:03:00 | 11.8217 | 0.00014 | 21.8550 | 194.4650 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 20 17:57 | 2025 Jun 19 14:45:45 | 11.8244 | 0.00014 | 21.8559 | 194.5514 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 19 17:56 | 2025 Jun 19 09:23:07 | 11.8247 | 0.00014 | 21.8560 | 194.8162 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 18 17:56 | 2025 Jun 17 14:45:38 | 11.8272 | 0.00014 | 21.8569 | 195.1272 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 17 17:56 | 2025 Jun 17 09:14:28 | 11.8276 | 0.00014 | 21.8570 | 195.4317 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 16 17:56 | 2025 Jun 15 14:49:12 | 11.8301 | 0.00014 | 21.8578 | 195.7411 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 15 17:56 | 2025 Jun 15 09:02:52 | 11.8304 | 0.00014 | 21.8579 | 196.0062 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 14 17:56 | 2025 Jun 13 14:50:51 | 11.8330 | 0.00014 | 21.8588 | 196.0006 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 13 17:56 | 2025 Jun 13 06:27:00 | 11.8335 | 0.00014 | 21.8590 | 196.2364 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 12 17:56 | 2025 Jun 11 14:29:38 | 11.8359 | 0.00014 | 21.8598 | 195.7898 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 11 17:56 | 2025 Jun 10 08:13:26 | 11.8378 | 0.00014 | 21.8604 | 195.4423 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 10 17:56 | 2025 Jun 09 14:54:10 | 11.8388 | 0.00014 | 21.8607 | 195.1386 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 09 17:56 | 2025 Jun 08 11:13:27 | 11.8406 | 0.00014 | 21.8613 | 194.5352 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 08 17:56 | 2025 Jun 07 14:55:54 | 11.8418 | 0.00014 | 21.8617 | 194.1671 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 07 17:56 | 2025 Jun 07 10:52:57 | 11.8421 | 0.00014 | 21.8618 | 193.9645 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 06 17:56 | 2025 Jun 05 07:22:22 | 11.8453 | 0.00014 | 21.8628 | 192.5355 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 05 17:56 | 2025 Jun 04 14:58:24 | 11.8463 | 0.00014 | 21.8631 | 192.1056 | 142.7488 | 1.00256 | 5.500 |
| 2025 Jun 04 17:57 | 2025 Jun 03 11:12:30 | 11.8480 | 0.00014 | 21.8637 | 191.1898 | 142.7488 | 1.00256 | 5.500 |