| Primary satellite | Secondary satellite |
| Name | SR | Helios 1B |
| Spacetrack catalog number | 46 | 25977 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:53 | 2021 Jan 17 17:14 |
| Time of closest approach (UTC) | 2020 Nov 27 20:50:26.741 |
| Minimum distance | 11.523 km |
| Height difference | 1.339 km |
| Relative speed | 14.943 km/s |
| Angle between velocity vectors | 161° |
| Geographic position | 34.5°S, 72.0°W |
| Height | 632 km |
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