| Primary satellite | Secondary satellite |
| Name | deb Kosmos-1275 | deb Delta 139 |
| Spacetrack catalog number | 12658 | 14908 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 01:26 | 2024 Dec 22 01:43 |
| Time of closest approach (UTC) | 2024 Dec 28 20:15:03.801 |
| Minimum distance | 4.598 km |
| Height difference | -2.814 km |
| Relative speed | 14.864 km/s |
| Angle between velocity vectors | 168° |
| Geographic position | 76.9°S, 140.3°E |
| Height | 811 km |
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