| Primary satellite | Secondary satellite |
| Name | deb Kosmos-1275 | deb Delta 139 |
| Spacetrack catalog number | 17642 | 12256 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 21:03 | 2024 Dec 22 14:07 |
| Time of closest approach (UTC) | 2024 Dec 23 17:34:13.649 |
| Minimum distance | 1.890 km |
| Height difference | 0.727 km |
| Relative speed | 14.871 km/s |
| Angle between velocity vectors | 168° |
| Geographic position | 77.4°N, 7.6°W |
| Height | 792 km |
|