| Primary satellite | Secondary satellite |
| Name | Cosmos 921 Rocket | OBJECT D |
| Spacetrack catalog number | 10096 | 61738 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Nov 17 20:26 | 2025 Nov 17 20:20 |
| Time of closest approach (UTC) | 2025 Oct 19 11:06:23.210 |
| Minimum distance | 34.959 km |
| Height difference | -3.518 km |
| Relative speed | 14.851 km/s |
| Angle between velocity vectors | 159° |
| Geographic position | 68.0°S, 109.4°E |
| Height | 608 km |
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