| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | NOAA 18 |
| Spacetrack catalog number | 35462 | 28654 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 21 21:54 | 2024 Dec 23 08:51 |
| Time of closest approach (UTC) | 2024 Dec 25 00:25:40.566 |
| Minimum distance | 4.384 km |
| Height difference | -2.807 km |
| Relative speed | 12.420 km/s |
| Angle between velocity vectors | 114° |
| Geographic position | 73.9°N, 172.8°W |
| Height | 870 km |
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