| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | deb Explorer 39 |
| Spacetrack catalog number | 36048 | 3392 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2025 May 20 18:14 | 2025 May 20 19:11 |
| Time of closest approach (UTC) | 2024 Jul 25 12:18:01.131 |
| Minimum distance | 2103.587 km |
| Height difference | -51.811 km |
| Relative speed | 8.910 km/s |
| Angle between velocity vectors | 73° |
| Geographic position | 73.0°S, 92.6°W |
| Height | 786 km |
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