| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 35284 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Feb 02 22:35 | 2023 Feb 01 23:00 |
| Time of closest approach (UTC) | 2022 Dec 01 05:20:14.066 |
| Minimum distance | 7.283 km |
| Height difference | -7.001 km |
| Relative speed | 14.850 km/s |
| Angle between velocity vectors | 166° |
| Geographic position | 53.6°N, 147.3°E |
| Height | 774 km |
|