| Primary satellite | Secondary satellite |
| Name | PEGASUS R/B | COSMOS 2251 DEB |
| Spacetrack catalog number | 27859 | 36052 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 19:49 | 2024 Dec 23 08:36 |
| Time of closest approach (UTC) | 2024 Dec 25 18:27:43.051 |
| Minimum distance | 59.888 km |
| Height difference | -4.094 km |
| Relative speed | 11.387 km/s |
| Angle between velocity vectors | 98° |
| Geographic position | 64.9°S, 60.2°W |
| Height | 635 km |
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