| Primary satellite | Secondary satellite |
| Name | Meteor 1-21 | deb Kosmos-1275 |
| Spacetrack catalog number | 7714 | 12700 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 19 09:21 | 2021 Jan 19 10:08 |
| Time of closest approach (UTC) | 2020 Dec 06 00:38:54.033 |
| Minimum distance | 139.448 km |
| Height difference | 1.948 km |
| Relative speed | 0.727 km/s |
| Angle between velocity vectors | 6° |
| Geographic position | 71.2°S, 158.9°E |
| Height | 874 km |
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