| Primary satellite | Secondary satellite |
| Name | deb Kosmos-1275 | deb Delta 139 |
| Spacetrack catalog number | 15766 | 14463 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2025 Jun 15 04:40 | 2025 Jun 16 08:57 |
| Time of closest approach (UTC) | 2025 May 16 09:14:51.042 |
| Minimum distance | 150.209 km |
| Height difference | -0.184 km |
| Relative speed | 13.135 km/s |
| Angle between velocity vectors | 122° |
| Geographic position | 79.9°N, 65.2°W |
| Height | 764 km |
|