| Primary satellite | Secondary satellite |
| Name | Cosmos 1125 Rocket | DMSP 5D-2 F6 DEB |
| Spacetrack catalog number | 11511 | 40915 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 20 12:05 | 2021 Jan 19 11:19 |
| Time of closest approach (UTC) | 2020 Dec 06 12:55:22.425 |
| Minimum distance | 97.453 km |
| Height difference | 4.654 km |
| Relative speed | 4.889 km/s |
| Angle between velocity vectors | 38° |
| Geographic position | 50.0°N, 106.0°W |
| Height | 766 km |
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