| Primary satellite | Secondary satellite |
| Name | Cosmos 1844 Rocket | Sep Motor Cover |
| Spacetrack catalog number | 17974 | 22577 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 25 10:21 | 2021 Jan 25 14:07 |
| Time of closest approach (UTC) | 2020 Dec 02 02:45:31.996 |
| Minimum distance | 138.371 km |
| Height difference | 0.412 km |
| Relative speed | 4.940 km/s |
| Angle between velocity vectors | 39° |
| Geographic position | 70.1°S, 95.0°W |
| Height | 850 km |
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