| Primary satellite | Secondary satellite |
| Name | STARLINK-3647 | OBJECT J |
| Spacetrack catalog number | 51994 | 57174 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 23 19:22 | 2024 Dec 23 14:55 |
| Time of closest approach (UTC) | 2024 Dec 24 05:52:01.777 |
| Minimum distance | 2.154 km |
| Height difference | -0.929 km |
| Relative speed | 14.224 km/s |
| Angle between velocity vectors | 139° |
| Geographic position | 39.8°N, 53.4°E |
| Height | 542 km |
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