| Primary satellite | Secondary satellite |
| Name | Nadezhda 4 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 23180 | 37406 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 22 13:11 | 2021 Jan 22 05:44 |
| Time of closest approach (UTC) | 2020 Nov 30 12:05:09.686 |
| Minimum distance | 69.720 km |
| Height difference | -1.408 km |
| Relative speed | 12.359 km/s |
| Angle between velocity vectors | 114° |
| Geographic position | 81.1°S, 129.1°E |
| Height | 977 km |
|