| Primary satellite | Secondary satellite |
| Name | Transit 4A | FENGYUN 1C DEB |
| Spacetrack catalog number | 116 | 35168 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Jan 23 08:47 | 2021 Jan 10 07:04 |
| Time of closest approach (UTC) | 2020 Nov 29 23:11:16.769 |
| Minimum distance | 9.090 km |
| Height difference | 6.317 km |
| Relative speed | 14.599 km/s |
| Angle between velocity vectors | 165° |
| Geographic position | 9.4°S, 102.4°E |
| Height | 929 km |
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