| Primary satellite | Secondary satellite |
| Name | Cosmos 1634 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 15598 | 30283 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Dec 08 13:01 | 2023 Dec 09 12:27 |
| Time of closest approach (UTC) | 2022 Sep 29 21:12:22.209 |
| Minimum distance | 963.848 km |
| Height difference | 7.089 km |
| Relative speed | 14.644 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 20.6°S, 142.6°E |
| Height | 995 km |
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