| Primary satellite | Secondary satellite |
| Name | ADEOS II | COSMOS 2251 DEB |
| Spacetrack catalog number | 27597 | 35840 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Sep 08 14:28 | 2024 Sep 07 19:46 |
| Time of closest approach (UTC) | 2024 Aug 13 06:03:29.698 |
| Minimum distance | 243.996 km |
| Height difference | -7.255 km |
| Relative speed | 14.680 km/s |
| Angle between velocity vectors | 161° |
| Geographic position | 69.8°S, 144.1°E |
| Height | 823 km |
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