| Primary satellite | Secondary satellite |
| Name | SL-16 R/B | FENGYUN 1C DEB |
| Spacetrack catalog number | 28353 | 32155 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 14 05:40 | 2021 Apr 14 09:26 |
| Time of closest approach (UTC) | 2021 Mar 06 06:57:54.695 |
| Minimum distance | 10.638 km |
| Height difference | -2.224 km |
| Relative speed | 14.721 km/s |
| Angle between velocity vectors | 166° |
| Geographic position | 43.6°N, 2.4°E |
| Height | 856 km |
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