| Primary satellite | Secondary satellite |
| Name | ARGOS | FENGYUN 1C DEB |
| Spacetrack catalog number | 25634 | 29968 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 14 12:58 | 2021 Apr 14 13:36 |
| Time of closest approach (UTC) | 2021 Feb 28 23:19:27.769 |
| Minimum distance | 111.813 km |
| Height difference | 4.364 km |
| Relative speed | 1.459 km/s |
| Angle between velocity vectors | 11° |
| Geographic position | 81.3°S, 19.5°E |
| Height | 848 km |
|