| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 34913 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Jan 28 22:24 | 2023 Jan 25 19:29 |
| Time of closest approach (UTC) | 2022 Dec 06 08:50:52.540 |
| Minimum distance | 13.025 km |
| Height difference | -0.772 km |
| Relative speed | 14.881 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 44.0°N, 97.8°E |
| Height | 772 km |
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