| Primary satellite | Secondary satellite |
| Name | SL-8 R/B | COSMOS 2251 DEB |
| Spacetrack catalog number | 36520 | 33789 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 23 05:12 | 2024 Dec 22 09:13 |
| Time of closest approach (UTC) | 2024 Dec 25 03:31:51.536 |
| Minimum distance | 2.712 km |
| Height difference | -2.711 km |
| Relative speed | 6.012 km/s |
| Angle between velocity vectors | 48° |
| Geographic position | 73.5°S, 105.1°E |
| Height | 1026 km |
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