| Primary satellite | Secondary satellite |
| Name | DELTA 1 DEB | COSMOS 2251 DEB |
| Spacetrack catalog number | 42661 | 36060 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 20 16:34 | 2024 Dec 20 18:37 |
| Time of closest approach (UTC) | 2024 Dec 26 11:28:00.911 |
| Minimum distance | 4.485 km |
| Height difference | -1.355 km |
| Relative speed | 14.914 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 39.9°N, 88.2°W |
| Height | 756 km |
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