| Primary satellite | Secondary satellite |
| Name | Cosmos 921 Rocket | STARLINK-34378 |
| Spacetrack catalog number | 10096 | 64299 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2025 Nov 17 20:26 | 2025 Nov 17 19:57 |
| Time of closest approach (UTC) | 2025 Oct 19 05:08:06.892 |
| Minimum distance | 656.275 km |
| Height difference | 8.260 km |
| Relative speed | 14.081 km/s |
| Angle between velocity vectors | 136° |
| Geographic position | 31.4°N, 113.1°W |
| Height | 572 km |
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