| Primary satellite | Secondary satellite |
| Name | SL-16 R/B | FENGYUN 1C DEB |
| Spacetrack catalog number | 28353 | 30445 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 14 05:40 | 2021 Apr 14 13:49 |
| Time of closest approach (UTC) | 2021 Mar 03 21:25:20.725 |
| Minimum distance | 15.648 km |
| Height difference | -4.844 km |
| Relative speed | 14.753 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 9.4°N, 168.7°E |
| Height | 851 km |
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