| Primary satellite | Secondary satellite |
| Name | CZ-4 R/B | FENGYUN 1C DEB |
| Spacetrack catalog number | 29507 | 31938 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 12 19:39 | 2021 Apr 13 18:14 |
| Time of closest approach (UTC) | 2021 Mar 09 15:02:14.647 |
| Minimum distance | 38.729 km |
| Height difference | -2.394 km |
| Relative speed | 14.420 km/s |
| Angle between velocity vectors | 143° |
| Geographic position | 63.7°N, 46.1°E |
| Height | 566 km |
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