| Primary satellite | Secondary satellite |
| Name | Cosmos 1844 Rocket | DMSP B5D2-6 |
| Spacetrack catalog number | 17974 | 21798 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 16 18:17 | 2021 Jan 16 19:50 |
| Time of closest approach (UTC) | 2020 Dec 04 06:26:45.288 |
| Minimum distance | 15.997 km |
| Height difference | 1.568 km |
| Relative speed | 13.208 km/s |
| Angle between velocity vectors | 126° |
| Geographic position | 70.9°N, 34.5°E |
| Height | 857 km |
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