| Primary satellite | Secondary satellite |
| Name | Cosmos 1937 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 19039 | 30721 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 18 01:40 | 2021 Jan 18 03:51 |
| Time of closest approach (UTC) | 2020 Dec 03 02:52:28.912 |
| Minimum distance | 83.965 km |
| Height difference | -1.667 km |
| Relative speed | 10.119 km/s |
| Angle between velocity vectors | 85° |
| Geographic position | 70.8°N, 139.5°E |
| Height | 782 km |
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