| Primary satellite | Secondary satellite |
| Name | RS-44 | CSL-04 DEB |
| Spacetrack catalog number | 44909 | 26119 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Apr 15 14:40 | 2021 Apr 15 22:29 |
| Time of closest approach (UTC) | 2021 Feb 26 07:34:33.173 |
| Minimum distance | 21.145 km |
| Height difference | 2.361 km |
| Relative speed | 13.396 km/s |
| Angle between velocity vectors | 142° |
| Geographic position | 80.6°N, 44.5°E |
| Height | 1390 km |
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