| Primary satellite | Secondary satellite |
| Name | ARGOS | FENGYUN 1C DEB |
| Spacetrack catalog number | 25634 | 31358 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 12 20:22 | 2021 Apr 13 09:50 |
| Time of closest approach (UTC) | 2021 Mar 01 23:46:16.822 |
| Minimum distance | 22.547 km |
| Height difference | 0.743 km |
| Relative speed | 12.957 km/s |
| Angle between velocity vectors | 122° |
| Geographic position | 72.2°N, 89.9°W |
| Height | 848 km |
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