| Primary satellite | Secondary satellite |
| Name | CZ-4B R/B | deb Kosmos-249 |
| Spacetrack catalog number | 27432 | 3753 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 08 18:34 | 2021 Mar 08 20:27 |
| Time of closest approach (UTC) | 2021 Jan 23 12:15:15.743 |
| Minimum distance | 203.449 km |
| Height difference | -5.382 km |
| Relative speed | 14.538 km/s |
| Angle between velocity vectors | 158° |
| Geographic position | 36.1°S, 95.3°E |
| Height | 835 km |
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