| Primary satellite | Secondary satellite |
| Name | deb Kosmos-397 | COSMOS 1275 DEB |
| Spacetrack catalog number | 5015 | 42183 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 12:08 | 2024 Dec 18 12:46 |
| Time of closest approach (UTC) | 2024 Dec 25 00:04:04.714 |
| Minimum distance | 6.042 km |
| Height difference | 0.567 km |
| Relative speed | 13.642 km/s |
| Angle between velocity vectors | 135° |
| Geographic position | 44.3°N, 169.3°E |
| Height | 968 km |
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