| Primary satellite | Secondary satellite |
| Name | Nadezhda 4 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 23180 | 38505 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 22 13:11 | 2020 Dec 24 23:53 |
| Time of closest approach (UTC) | 2020 Nov 29 13:18:37.449 |
| Minimum distance | 10.991 km |
| Height difference | 7.399 km |
| Relative speed | 14.684 km/s |
| Angle between velocity vectors | 176° |
| Geographic position | 69.4°S, 3.0°E |
| Height | 979 km |
|