| Primary satellite | Secondary satellite |
| Name | CZ-2C R/B | COSMOS 1275 DEB |
| Spacetrack catalog number | 28480 | 42174 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 14 13:36 | 2021 Apr 14 01:35 |
| Time of closest approach (UTC) | 2021 Mar 01 18:38:06.072 |
| Minimum distance | 3.601 km |
| Height difference | 1.212 km |
| Relative speed | 14.973 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 63.5°N, 161.5°W |
| Height | 777 km |
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