| Primary satellite | Secondary satellite |
| Name | Cosmos 1674 | FENGYUN 1C DEB |
| Spacetrack catalog number | 15944 | 32124 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 10:39 | 2021 Jan 17 18:25 |
| Time of closest approach (UTC) | 2020 Dec 03 06:35:40.130 |
| Minimum distance | 3253.777 km |
| Height difference | -9.798 km |
| Relative speed | 11.146 km/s |
| Angle between velocity vectors | 94° |
| Geographic position | 60.7°S, 130.5°W |
| Height | 532 km |
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