| Primary satellite | Secondary satellite |
| Name | ARGOS | COSMOS 2251 DEB |
| Spacetrack catalog number | 25634 | 34302 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 08 13:35 | 2024 Dec 08 10:34 |
| Time of closest approach (UTC) | 2024 Nov 18 02:53:07.495 |
| Minimum distance | 18.985 km |
| Height difference | -0.976 km |
| Relative speed | 14.779 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 43.5°S, 150.3°W |
| Height | 838 km |
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