| Primary satellite | Secondary satellite |
| Name | Cosmos 1125 Rocket | COSMOS 1867 COOLANT |
| Spacetrack catalog number | 11511 | 39677 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 16 12:51 | 2021 Jan 15 15:52 |
| Time of closest approach (UTC) | 2020 Nov 29 21:43:20.209 |
| Minimum distance | 29.252 km |
| Height difference | 4.895 km |
| Relative speed | 12.971 km/s |
| Angle between velocity vectors | 121° |
| Geographic position | 44.5°S, 104.7°E |
| Height | 793 km |
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