| Primary satellite | Secondary satellite |
| Name | Cosmos 1125 Rocket | CSL-04 Deb |
| Spacetrack catalog number | 11511 | 26286 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 16 12:51 | 2021 Jan 16 11:34 |
| Time of closest approach (UTC) | 2020 Dec 01 02:18:40.352 |
| Minimum distance | 7.539 km |
| Height difference | 1.598 km |
| Relative speed | 14.876 km/s |
| Angle between velocity vectors | 173° |
| Geographic position | 7.0°S, 46.7°E |
| Height | 773 km |
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