| Primary satellite | Secondary satellite |
| Name | Cosmos 1633 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 15593 | 31563 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 May 13 22:37 | 2025 May 13 15:15 |
| Time of closest approach (UTC) | 2024 Jun 24 20:16:44.986 |
| Minimum distance | 5230.901 km |
| Height difference | 10.839 km |
| Relative speed | 13.051 km/s |
| Angle between velocity vectors | 120° |
| Geographic position | 45.4°S, 156.5°E |
| Height | 631 km |
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