| Primary satellite | Secondary satellite |
| Name | Iridium 4 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 24797 | 31684 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:21 | 2020 Dec 24 09:47 |
| Time of closest approach (UTC) | 2020 Dec 02 09:41:25.108 |
| Minimum distance | 7.854 km |
| Height difference | -2.512 km |
| Relative speed | 14.460 km/s |
| Angle between velocity vectors | 160° |
| Geographic position | 71.3°S, 137.6°W |
| Height | 927 km |
|