| Primary satellite | Secondary satellite |
| Name | NEOSSAT | Cosmos 1125 |
| Spacetrack catalog number | 39089 | 11510 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 12:30 | 2024 Dec 22 16:20 |
| Time of closest approach (UTC) | 2024 Dec 25 04:10:25.757 |
| Minimum distance | 5.018 km |
| Height difference | 4.948 km |
| Relative speed | 11.623 km/s |
| Angle between velocity vectors | 103° |
| Geographic position | 73.3°S, 176.5°E |
| Height | 809 km |
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