| Primary satellite | Secondary satellite |
| Name | SL-08 R/B | FENGYUN 1C DEB |
| Spacetrack catalog number | 27819 | 32353 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 21 04:21 | 2021 Apr 19 07:47 |
| Time of closest approach (UTC) | 2021 Mar 01 09:00:03.885 |
| Minimum distance | 4.585 km |
| Height difference | -3.393 km |
| Relative speed | 14.561 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 77.0°N, 157.7°W |
| Height | 1032 km |
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