| Primary satellite | Secondary satellite |
| Name | Cosmos 1844 Rocket | DMSP 5D-3 F19 (USA 249) |
| Spacetrack catalog number | 17974 | 39630 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 16 18:17 | 2021 Jan 16 11:31 |
| Time of closest approach (UTC) | 2020 Dec 05 04:27:03.537 |
| Minimum distance | 13.199 km |
| Height difference | 2.481 km |
| Relative speed | 13.637 km/s |
| Angle between velocity vectors | 133° |
| Geographic position | 70.3°N, 51.8°E |
| Height | 857 km |
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