| Primary satellite | Secondary satellite |
| Name | ARGOS | FENGYUN 1C DEB |
| Spacetrack catalog number | 25634 | 30073 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 11 12:13 | 2021 Apr 11 15:16 |
| Time of closest approach (UTC) | 2021 Mar 08 11:40:11.049 |
| Minimum distance | 30.235 km |
| Height difference | -1.599 km |
| Relative speed | 14.414 km/s |
| Angle between velocity vectors | 151° |
| Geographic position | 52.0°N, 50.5°W |
| Height | 837 km |
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