| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | Cosmos 1606 Rocket |
| Spacetrack catalog number | 35605 | 15370 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 20 17:09 | 2024 Dec 23 08:35 |
| Time of closest approach (UTC) | 2024 Dec 25 16:51:00.059 |
| Minimum distance | 3.454 km |
| Height difference | 1.687 km |
| Relative speed | 4.096 km/s |
| Angle between velocity vectors | 31° |
| Geographic position | 70.0°S, 59.0°W |
| Height | 630 km |
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