| Primary satellite | Secondary satellite |
| Name | DELTA 1 DEB | COSMOS 2251 DEB |
| Spacetrack catalog number | 37651 | 34065 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2025 Nov 14 12:59 | 2025 Nov 17 10:19 |
| Time of closest approach (UTC) | 2025 Oct 18 05:22:11.252 |
| Minimum distance | 322.864 km |
| Height difference | -1.696 km |
| Relative speed | 5.001 km/s |
| Angle between velocity vectors | 39° |
| Geographic position | 50.8°N, 88.2°W |
| Height | 770 km |
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