| Primary satellite | Secondary satellite |
| Name | Cosmos 1125 Rocket | CZ-4 DEB |
| Spacetrack catalog number | 11511 | 28068 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 20 12:05 | 2021 Jan 16 06:04 |
| Time of closest approach (UTC) | 2020 Dec 07 09:02:43.126 |
| Minimum distance | 4.787 km |
| Height difference | 4.772 km |
| Relative speed | 14.763 km/s |
| Angle between velocity vectors | 162° |
| Geographic position | 63.2°N, 35.7°W |
| Height | 768 km |
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