| Primary satellite | Secondary satellite |
| Name | deb Delta 139 | COSMOS 2251 DEB |
| Spacetrack catalog number | 12203 | 33986 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:24 | 2024 Dec 22 11:32 |
| Time of closest approach (UTC) | 2024 Dec 26 13:12:51.218 |
| Minimum distance | 2.851 km |
| Height difference | 1.362 km |
| Relative speed | 13.906 km/s |
| Angle between velocity vectors | 138° |
| Geographic position | 73.4°S, 132.9°W |
| Height | 796 km |
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