| Primary satellite | Secondary satellite |
| Name | ARIANE 1 DEB | COSMOS 2251 DEB |
| Spacetrack catalog number | 39107 | 35975 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 21 20:48 | 2024 Dec 22 09:29 |
| Time of closest approach (UTC) | 2024 Dec 26 03:21:28.438 |
| Minimum distance | 4.883 km |
| Height difference | 3.362 km |
| Relative speed | 14.481 km/s |
| Angle between velocity vectors | 149° |
| Geographic position | 71.5°N, 140.3°W |
| Height | 769 km |
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