| Primary satellite | Secondary satellite |
| Name | Transit 4A | FENGYUN 1C DEB |
| Spacetrack catalog number | 116 | 47015 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Jan 16 04:19 | 2021 Jan 15 12:28 |
| Time of closest approach (UTC) | 2020 Dec 02 16:18:19.354 |
| Minimum distance | 124.792 km |
| Height difference | -3.236 km |
| Relative speed | 10.495 km/s |
| Angle between velocity vectors | 91° |
| Geographic position | 65.5°S, 89.7°E |
| Height | 888 km |
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