| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 33995 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Mar 21 13:44 | 2023 Mar 21 11:08 |
| Time of closest approach (UTC) | 2023 Feb 11 08:40:55.394 |
| Minimum distance | 42.624 km |
| Height difference | -0.455 km |
| Relative speed | 14.924 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 24.0°N, 102.6°E |
| Height | 768 km |
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