| Primary satellite | Secondary satellite |
| Name | Cosmos 1674 | FENGYUN 1C DEB |
| Spacetrack catalog number | 15944 | 37032 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 10:39 | 2021 Jan 17 06:10 |
| Time of closest approach (UTC) | 2020 Dec 06 05:38:08.370 |
| Minimum distance | 1086.541 km |
| Height difference | 4.224 km |
| Relative speed | 10.566 km/s |
| Angle between velocity vectors | 88° |
| Geographic position | 72.4°S, 132.8°W |
| Height | 535 km |
|