| Primary satellite | Secondary satellite |
| Name | RS-44 | Kosmos-1638 |
| Spacetrack catalog number | 44909 | 15620 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2022 Jun 29 13:02 | 2022 Jun 29 10:26 |
| Time of closest approach (UTC) | 2022 May 19 20:47:47.232 |
| Minimum distance | 24.246 km |
| Height difference | 2.280 km |
| Relative speed | 4.833 km/s |
| Angle between velocity vectors | 40° |
| Geographic position | 72.6°S, 95.6°W |
| Height | 1480 km |
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