| Primary satellite | Secondary satellite |
| Name | NOAA 12 | FENGYUN 1C DEB |
| Spacetrack catalog number | 21263 | 35186 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 11 14:33 | 2021 Apr 03 18:20 |
| Time of closest approach (UTC) | 2021 Mar 05 20:04:59.417 |
| Minimum distance | 0.957 km |
| Height difference | -0.214 km |
| Relative speed | 14.702 km/s |
| Angle between velocity vectors | 162° |
| Geographic position | 6.5°S, 30.9°W |
| Height | 809 km |
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