| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 40228 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Jun 02 13:06 | 2023 May 31 17:52 |
| Time of closest approach (UTC) | 2023 Apr 07 03:42:43.446 |
| Minimum distance | 60.947 km |
| Height difference | -2.126 km |
| Relative speed | 14.716 km/s |
| Angle between velocity vectors | 161° |
| Geographic position | 64.8°S, 18.5°W |
| Height | 788 km |
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