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 Apr 04 17:57 | 2026 Apr 04 05:24:21 | 11.4124 | 0.00014 | 21.7193 | 316.6441 | 238.9142 | 1.00361 | 5.500 |
| 2026 Apr 03 17:56 | 2026 Apr 03 05:26:43 | 11.4138 | 0.00014 | 21.7197 | 316.3488 | 238.9142 | 1.00361 | 5.500 |
| 2026 Apr 02 18:03 | 2026 Apr 02 05:29:05 | 11.4153 | 0.00014 | 21.7202 | 316.1201 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 31 17:57 | 2026 Mar 31 03:51:22 | 11.4182 | 0.00013 | 21.7211 | 315.5168 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 30 17:58 | 2026 Mar 30 06:09:35 | 11.4195 | 0.00013 | 21.7215 | 315.5636 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 29 17:57 | 2026 Mar 29 03:56:02 | 11.4210 | 0.00013 | 21.7220 | 315.7347 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 28 18:57 | 2026 Mar 28 04:56:38 | 11.4223 | 0.00013 | 21.7224 | 315.9276 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 27 18:57 | 2026 Mar 27 05:43:19 | 11.4236 | 0.00013 | 21.7229 | 316.1702 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 26 18:57 | 2026 Mar 26 05:45:46 | 11.4249 | 0.00013 | 21.7233 | 316.4093 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 25 18:56 | 2026 Mar 25 06:52:25 | 11.4262 | 0.00013 | 21.7238 | 316.9296 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 24 18:56 | 2026 Mar 23 05:52:52 | 11.4291 | 0.00014 | 21.7247 | 317.2951 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 23 18:56 | 2026 Mar 23 05:52:52 | 11.4291 | 0.00014 | 21.7247 | 317.2951 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 22 18:56 | 2026 Mar 22 05:55:18 | 11.4305 | 0.00014 | 21.7252 | 317.3129 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 21 19:05 | 2026 Mar 20 07:11:38 | 11.4332 | 0.00015 | 21.7261 | 317.0014 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 20 18:57 | 2026 Mar 20 07:11:38 | 11.4332 | 0.00015 | 21.7261 | 317.0014 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 19 18:56 | 2026 Mar 19 06:02:19 | 11.4347 | 0.00015 | 21.7266 | 316.6794 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 18 18:56 | 2026 Mar 18 06:04:54 | 11.4361 | 0.00015 | 21.7270 | 316.2274 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 17 18:56 | 2026 Mar 17 06:07:08 | 11.4375 | 0.00016 | 21.7275 | 315.7776 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 16 18:57 | 2026 Mar 16 06:09:25 | 11.4389 | 0.00016 | 21.7280 | 315.2659 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 15 18:56 | 2026 Mar 15 06:11:40 | 11.4403 | 0.00016 | 21.7284 | 314.6965 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 14 18:56 | 2026 Mar 14 06:13:59 | 11.4417 | 0.00016 | 21.7289 | 314.1122 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 13 18:57 | 2026 Mar 12 06:18:29 | 11.4445 | 0.00016 | 21.7298 | 312.5843 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 12 18:57 | 2026 Mar 12 06:18:29 | 11.4445 | 0.00016 | 21.7298 | 312.5843 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 11 18:56 | 2026 Mar 11 06:20:49 | 11.4459 | 0.00016 | 21.7302 | 312.0265 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 10 18:56 | 2026 Mar 10 08:30:40 | 11.4472 | 0.00016 | 21.7306 | 311.5773 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 09 18:56 | 2026 Mar 09 09:08:05 | 11.4486 | 0.00016 | 21.7311 | 311.0660 | 238.9142 | 1.00361 | 5.500 |
| 2026 Mar 08 18:57 | 2026 Mar 08 09:41:11 | 11.4499 | 0.00016 | 21.7315 | 310.4350 | 238.9142 | 1.00361 | 5.500 |