| Primary satellite | Secondary satellite |
| Name | Nadezhda 1 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 20104 | 29772 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 17 09:35 | 2021 Apr 17 09:17 |
| Time of closest approach (UTC) | 2021 Mar 03 11:39:57.979 |
| Minimum distance | 86.489 km |
| Height difference | -3.513 km |
| Relative speed | 13.861 km/s |
| Angle between velocity vectors | 142° |
| Geographic position | 82.1°S, 151.7°E |
| Height | 997 km |
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