| Primary satellite | Secondary satellite |
| Name | Envisat | Cosmos 1125 Rocket |
| Spacetrack catalog number | 27386 | 11511 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 24 11:52 | 2021 Jan 24 04:39 |
| Time of closest approach (UTC) | 2020 Nov 30 15:27:35.960 |
| Minimum distance | 7.511 km |
| Height difference | 2.809 km |
| Relative speed | 14.905 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 4.9°N, 31.4°E |
| Height | 768 km |
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