| Primary satellite | Secondary satellite |
| Name | Envisat | FENGYUN 1C DEB |
| Spacetrack catalog number | 27386 | 31337 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 16 14:23 | 2021 Apr 16 06:09 |
| Time of closest approach (UTC) | 2021 Mar 06 10:02:26.995 |
| Minimum distance | 18.281 km |
| Height difference | 0.410 km |
| Relative speed | 14.735 km/s |
| Angle between velocity vectors | 162° |
| Geographic position | 16.7°N, 67.8°W |
| Height | 767 km |
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