| Primary satellite | Secondary satellite |
| Name | SL-08 R/B | Kosmos-1011 |
| Spacetrack catalog number | 27535 | 10917 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2026 Jan 19 05:49 | 2026 Jan 19 05:51 |
| Time of closest approach (UTC) | 2025 Dec 09 18:44:14.271 |
| Minimum distance | 12.920 km |
| Height difference | 4.190 km |
| Relative speed | 13.186 km/s |
| Angle between velocity vectors | 127° |
| Geographic position | 74.1°N, 114.7°W |
| Height | 973 km |
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