| Primary satellite | Secondary satellite |
| Name | Envisat | DMSP 5D-2 F13 DEB |
| Spacetrack catalog number | 27386 | 40474 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 16 14:23 | 2021 Apr 15 13:48 |
| Time of closest approach (UTC) | 2021 Mar 03 14:49:39.688 |
| Minimum distance | 20.198 km |
| Height difference | 8.383 km |
| Relative speed | 13.132 km/s |
| Angle between velocity vectors | 123° |
| Geographic position | 71.8°N, 12.5°E |
| Height | 778 km |
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