| Primary satellite | Secondary satellite |
| Name | UNK | BEIJING 1 (TSINGHUA) |
| Spacetrack catalog number | 28479 | 28890 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 23 03:02 | 2024 Dec 23 06:03 |
| Time of closest approach (UTC) | 2024 Dec 27 23:47:22.397 |
| Minimum distance | 2.806 km |
| Height difference | 2.568 km |
| Relative speed | 12.418 km/s |
| Angle between velocity vectors | 111° |
| Geographic position | 75.5°N, 115.2°W |
| Height | 688 km |
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