| Primary satellite | Secondary satellite |
| Name | SL-16 R/B | FENGYUN 1C DEB |
| Spacetrack catalog number | 28353 | 35122 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 14 05:40 | 2021 Apr 14 07:39 |
| Time of closest approach (UTC) | 2021 Mar 04 07:31:22.392 |
| Minimum distance | 58.221 km |
| Height difference | -0.591 km |
| Relative speed | 3.978 km/s |
| Angle between velocity vectors | 31° |
| Geographic position | 26.3°N, 9.4°E |
| Height | 852 km |
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