| Primary satellite | Secondary satellite |
| Name | First-Move | deb Kosmos-676 |
| Spacetrack catalog number | 39439 | 8756 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2021 Feb 27 12:52 | 2021 Feb 27 20:44 |
| Time of closest approach (UTC) | 2021 Jan 19 12:44:22.750 |
| Minimum distance | 4.850 km |
| Height difference | -4.341 km |
| Relative speed | 14.978 km/s |
| Angle between velocity vectors | 168° |
| Geographic position | 45.7°N, 54.8°E |
| Height | 651 km |
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