| Primary satellite | Secondary satellite |
| Name | Meteor 1-21 | deb Kosmos-1275 |
| Spacetrack catalog number | 7714 | 12767 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 19 09:21 | 2021 Jan 19 13:48 |
| Time of closest approach (UTC) | 2020 Dec 07 02:12:34.809 |
| Minimum distance | 7.069 km |
| Height difference | -1.641 km |
| Relative speed | 13.881 km/s |
| Angle between velocity vectors | 138° |
| Geographic position | 67.3°S, 128.1°E |
| Height | 873 km |
|