| Primary satellite | Secondary satellite |
| Name | Iridium 4 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 24797 | 29865 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:21 | 2021 Jan 17 12:10 |
| Time of closest approach (UTC) | 2020 Nov 28 00:07:16.882 |
| Minimum distance | 6.762 km |
| Height difference | -6.079 km |
| Relative speed | 14.808 km/s |
| Angle between velocity vectors | 151° |
| Geographic position | 76.7°N, 164.1°W |
| Height | 599 km |
|