| Primary satellite | Secondary satellite |
| Name | deb Kosmos-1275 | deb Delta 139 |
| Spacetrack catalog number | 12703 | 12290 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 17:13 | 2024 Dec 22 20:59 |
| Time of closest approach (UTC) | 2024 Dec 29 15:42:31.247 |
| Minimum distance | 4.415 km |
| Height difference | -3.889 km |
| Relative speed | 10.636 km/s |
| Angle between velocity vectors | 92° |
| Geographic position | 78.7°S, 139.5°E |
| Height | 897 km |
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