| Primary satellite | Secondary satellite |
| Name | Cosmos 921 Rocket | LEMUR 2 SQUIRRELCOMM |
| Spacetrack catalog number | 10096 | 60578 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2025 Nov 17 20:26 | 2025 Nov 17 15:41 |
| Time of closest approach (UTC) | 2025 Oct 14 02:48:26.958 |
| Minimum distance | 992.936 km |
| Height difference | -0.678 km |
| Relative speed | 3.446 km/s |
| Angle between velocity vectors | 26° |
| Geographic position | 32.7°N, 63.7°W |
| Height | 569 km |
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