| Primary satellite | Secondary satellite |
| Name | ARGOS | COSMOS 2251 DEB |
| Spacetrack catalog number | 25634 | 33908 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Mar 30 10:59 | 2023 Mar 30 07:45 |
| Time of closest approach (UTC) | 2023 Feb 07 01:53:51.551 |
| Minimum distance | 13.399 km |
| Height difference | 6.546 km |
| Relative speed | 14.878 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 31.9°N, 125.6°W |
| Height | 826 km |
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