| Primary satellite | Secondary satellite |
| Name | SL-08 R/B | COSMOS 2251 DEB |
| Spacetrack catalog number | 27561 | 36045 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 12:41 | 2024 Dec 16 21:15 |
| Time of closest approach (UTC) | 2024 Dec 26 18:08:01.589 |
| Minimum distance | 2.986 km |
| Height difference | 0.899 km |
| Relative speed | 14.898 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 30.4°S, 7.5°E |
| Height | 735 km |
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