| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 34009 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Sep 23 22:11 | 2023 Sep 23 10:33 |
| Time of closest approach (UTC) | 2022 Aug 19 23:43:15.914 |
| Minimum distance | 833.371 km |
| Height difference | 5.427 km |
| Relative speed | 14.936 km/s |
| Angle between velocity vectors | 175° |
| Geographic position | 72.8°N, 92.7°E |
| Height | 777 km |
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