| Primary satellite | Secondary satellite |
| Name | ARGOS | FENGYUN 1C DEB |
| Spacetrack catalog number | 25634 | 36990 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 09 19:37 | 2021 Apr 07 15:33 |
| Time of closest approach (UTC) | 2021 Mar 05 19:09:23.538 |
| Minimum distance | 10.230 km |
| Height difference | -0.746 km |
| Relative speed | 12.248 km/s |
| Angle between velocity vectors | 110° |
| Geographic position | 76.9°N, 32.7°W |
| Height | 848 km |
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