| Primary satellite | Secondary satellite |
| Name | SL-8 R/B | deb Kosmos-1275 |
| Spacetrack catalog number | 36520 | 12649 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 23 05:12 | 2024 Dec 22 16:53 |
| Time of closest approach (UTC) | 2024 Dec 24 07:20:05.589 |
| Minimum distance | 4.818 km |
| Height difference | 3.249 km |
| Relative speed | 4.742 km/s |
| Angle between velocity vectors | 38° |
| Geographic position | 82.6°N, 144.6°E |
| Height | 998 km |
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