| Primary satellite | Secondary satellite |
| Name | Cosmos 2142 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 21231 | 37921 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 18:58 | 2024 Dec 21 21:46 |
| Time of closest approach (UTC) | 2024 Dec 28 00:37:16.858 |
| Minimum distance | 3.599 km |
| Height difference | -2.777 km |
| Relative speed | 14.720 km/s |
| Angle between velocity vectors | 174° |
| Geographic position | 69.2°N, 143.3°E |
| Height | 967 km |
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