| Primary satellite | Secondary satellite |
| Name | Transit 4A | FENGYUN 1C DEB |
| Spacetrack catalog number | 116 | 38783 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Jan 22 17:16 | 2021 Jan 22 22:14 |
| Time of closest approach (UTC) | 2020 Nov 27 09:32:08.918 |
| Minimum distance | 112.564 km |
| Height difference | 6.771 km |
| Relative speed | 13.466 km/s |
| Angle between velocity vectors | 135° |
| Geographic position | 64.9°N, 25.4°E |
| Height | 991 km |
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