| Primary satellite | Secondary satellite |
| Name | Cosmos 1125 Rocket | SL-16 DEB |
| Spacetrack catalog number | 11511 | 27749 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 11 14:42 | 2021 Apr 11 05:24 |
| Time of closest approach (UTC) | 2021 Mar 08 16:39:21.307 |
| Minimum distance | 74.889 km |
| Height difference | 1.411 km |
| Relative speed | 1.142 km/s |
| Angle between velocity vectors | 9° |
| Geographic position | 63.7°S, 117.3°W |
| Height | 784 km |
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