| Primary satellite | Secondary satellite |
| Name | Cosmos 1908 Rocket | CZ-2D DEB |
| Spacetrack catalog number | 18749 | 44612 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 10:51 | 2021 Jan 14 15:23 |
| Time of closest approach (UTC) | 2020 Dec 07 10:22:53.682 |
| Minimum distance | 3.914 km |
| Height difference | -3.908 km |
| Relative speed | 14.751 km/s |
| Angle between velocity vectors | 157° |
| Geographic position | 82.2°S, 110.1°W |
| Height | 660 km |
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