| Primary satellite | Secondary satellite |
| Name | Transit 4A | FENGYUN 1C DEB |
| Spacetrack catalog number | 116 | 30658 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Mar 07 13:18 | 2021 Mar 06 12:01 |
| Time of closest approach (UTC) | 2021 Jan 28 01:11:44.972 |
| Minimum distance | 11.189 km |
| Height difference | 4.853 km |
| Relative speed | 14.292 km/s |
| Angle between velocity vectors | 153° |
| Geographic position | 53.4°N, 91.3°W |
| Height | 981 km |
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