| Primary satellite | Secondary satellite |
| Name | deb Kosmos-1275 | deb Delta 139 |
| Spacetrack catalog number | 12658 | 12174 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 01:26 | 2024 Dec 23 02:15 |
| Time of closest approach (UTC) | 2024 Dec 24 00:41:31.882 |
| Minimum distance | 3.088 km |
| Height difference | 1.306 km |
| Relative speed | 14.679 km/s |
| Angle between velocity vectors | 162° |
| Geographic position | 79.6°N, 156.0°E |
| Height | 848 km |
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