| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | Cosmos 1898 |
| Spacetrack catalog number | 34913 | 18585 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 07:23 | 2024 Dec 23 04:11 |
| Time of closest approach (UTC) | 2024 Dec 24 19:35:36.544 |
| Minimum distance | 2.440 km |
| Height difference | -1.698 km |
| Relative speed | 14.327 km/s |
| Angle between velocity vectors | 147° |
| Geographic position | 14.3°S, 177.3°E |
| Height | 775 km |
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