| Primary satellite | Secondary satellite |
| Name | deb Kosmos-1275 | deb Delta 139 |
| Spacetrack catalog number | 12698 | 14910 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 20:12 | 2024 Dec 23 03:31 |
| Time of closest approach (UTC) | 2024 Dec 28 03:43:15.415 |
| Minimum distance | 3.247 km |
| Height difference | 2.161 km |
| Relative speed | 14.884 km/s |
| Angle between velocity vectors | 177° |
| Geographic position | 52.3°S, 32.0°W |
| Height | 818 km |
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