| Primary satellite | Secondary satellite |
| Name | COSMOS 1818 DEB | deb Chang Zheng 4 |
| Spacetrack catalog number | 36938 | 20903 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 20 12:47 | 2024 Dec 21 23:25 |
| Time of closest approach (UTC) | 2024 Dec 26 13:39:36.445 |
| Minimum distance | 4.789 km |
| Height difference | 4.602 km |
| Relative speed | 11.767 km/s |
| Angle between velocity vectors | 104° |
| Geographic position | 65.0°S, 128.4°W |
| Height | 778 km |
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