| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 34388 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Jan 28 12:48 | 2023 Jan 28 09:43 |
| Time of closest approach (UTC) | 2022 Dec 02 05:54:44.914 |
| Minimum distance | 7.963 km |
| Height difference | 7.027 km |
| Relative speed | 14.841 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 45.8°S, 158.4°E |
| Height | 782 km |
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