| Primary satellite | Secondary satellite |
| Name | BRO-15 | COSMOS 2251 DEB |
| Spacetrack catalog number | 60553 | 38212 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 04:06 | 2024 Dec 20 14:24 |
| Time of closest approach (UTC) | 2024 Dec 27 16:49:27.821 |
| Minimum distance | 1.608 km |
| Height difference | -1.003 km |
| Relative speed | 5.392 km/s |
| Angle between velocity vectors | 42° |
| Geographic position | 54.8°S, 103.9°W |
| Height | 612 km |
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