| Primary satellite | Secondary satellite |
| Name | ARGOS | COSMOS 2251 DEB |
| Spacetrack catalog number | 25634 | 39553 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Sep 29 13:55 | 2023 Sep 28 17:05 |
| Time of closest approach (UTC) | 2023 Jun 02 06:13:27.884 |
| Minimum distance | 1341.075 km |
| Height difference | 14.385 km |
| Relative speed | 5.152 km/s |
| Angle between velocity vectors | 40° |
| Geographic position | 56.5°N, 157.6°E |
| Height | 829 km |
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