| Primary satellite | Secondary satellite |
| Name | PEGASUS R/B | COSMOS 2251 DEB |
| Spacetrack catalog number | 27652 | 35839 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 06:16 | 2024 Dec 21 07:58 |
| Time of closest approach (UTC) | 2024 Dec 28 07:58:57.087 |
| Minimum distance | 6.909 km |
| Height difference | -2.766 km |
| Relative speed | 8.018 km/s |
| Angle between velocity vectors | 64° |
| Geographic position | 39.9°S, 63.6°W |
| Height | 591 km |
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