| Primary satellite | Secondary satellite |
| Name | NOSS 3-3 (C) | deb Kosmos-839 |
| Spacetrack catalog number | 28541 | 10618 |
| Radar cross section | | medium |
| Epoch of two-line elements (UTC) | 2021 Mar 19 18:45 | 2021 Apr 10 17:01 |
| Time of closest approach (UTC) | 2021 Mar 03 17:35:17.900 |
| Minimum distance | 16.777 km |
| Height difference | -1.794 km |
| Relative speed | 9.190 km/s |
| Angle between velocity vectors | 76° |
| Geographic position | 57.3°S, 146.2°W |
| Height | 1011 km |
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