| Primary satellite | Secondary satellite |
| Name | Cosmos 923 Rocket | NEOSSAT |
| Spacetrack catalog number | 10121 | 39089 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2025 Jul 12 12:37 | 2025 Jul 13 12:16 |
| Time of closest approach (UTC) | 2025 Jun 18 09:05:25.642 |
| Minimum distance | 1.331 km |
| Height difference | 0.615 km |
| Relative speed | 14.881 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 36.0°N, 136.2°E |
| Height | 779 km |
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