| Primary satellite | Secondary satellite |
| Name | OAO 1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 2142 | 35647 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 14:56 | 2024 Dec 21 00:26 |
| Time of closest approach (UTC) | 2024 Dec 29 09:06:36.867 |
| Minimum distance | 3.242 km |
| Height difference | 0.212 km |
| Relative speed | 11.868 km/s |
| Angle between velocity vectors | 105° |
| Geographic position | 15.6°N, 161.9°E |
| Height | 771 km |
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