| Primary satellite | Secondary satellite |
| Name | Iridium 4 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 24797 | 31483 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:21 | 2021 Jan 17 10:42 |
| Time of closest approach (UTC) | 2020 Dec 03 02:19:50.808 |
| Minimum distance | 295.565 km |
| Height difference | 8.171 km |
| Relative speed | 6.827 km/s |
| Angle between velocity vectors | 55° |
| Geographic position | 73.6°S, 26.7°W |
| Height | 925 km |
|