| Primary satellite | Secondary satellite |
| Name | Cosmos 1538 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 14760 | 35980 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 11:37 | 2024 Dec 20 13:14 |
| Time of closest approach (UTC) | 2024 Dec 26 03:31:02.616 |
| Minimum distance | 2.498 km |
| Height difference | -1.876 km |
| Relative speed | 5.207 km/s |
| Angle between velocity vectors | 41° |
| Geographic position | 73.0°N, 37.6°E |
| Height | 773 km |
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