| Primary satellite | Secondary satellite |
| Name | Cosmos 2123 Rocket | COSMOS 1275 DEB |
| Spacetrack catalog number | 21090 | 42170 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Sep 10 20:22 | 2024 Sep 09 15:24 |
| Time of closest approach (UTC) | 2024 Aug 15 01:56:34.097 |
| Minimum distance | 406.220 km |
| Height difference | -8.824 km |
| Relative speed | 5.869 km/s |
| Angle between velocity vectors | 47° |
| Geographic position | 81.4°S, 28.4°W |
| Height | 990 km |
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