| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | Envisat |
| Spacetrack catalog number | 37530 | 27386 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 19 01:13 | 2024 Dec 22 22:03 |
| Time of closest approach (UTC) | 2024 Dec 28 11:34:47.292 |
| Minimum distance | 3.302 km |
| Height difference | -1.442 km |
| Relative speed | 8.459 km/s |
| Angle between velocity vectors | 69° |
| Geographic position | 67.8°N, 26.1°E |
| Height | 775 km |
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