| Primary satellite | Secondary satellite |
| Name | Cosmos 1937 Rocket | Cosmos 1140 Rocket |
| Spacetrack catalog number | 19039 | 11574 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 18 01:40 | 2021 Jan 17 20:26 |
| Time of closest approach (UTC) | 2020 Dec 02 13:24:18.226 |
| Minimum distance | 16.525 km |
| Height difference | -0.566 km |
| Relative speed | 9.793 km/s |
| Angle between velocity vectors | 82° |
| Geographic position | 68.8°N, 94.8°W |
| Height | 773 km |
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