| Primary satellite | Secondary satellite |
| Name | SL-08 R/B | FENGYUN 1C DEB |
| Spacetrack catalog number | 27819 | 37715 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 21 04:21 | 2021 Apr 20 08:31 |
| Time of closest approach (UTC) | 2021 Mar 04 04:39:45.239 |
| Minimum distance | 89.410 km |
| Height difference | -3.647 km |
| Relative speed | 2.206 km/s |
| Angle between velocity vectors | 17° |
| Geographic position | 20.8°S, 132.5°W |
| Height | 996 km |
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