| Primary satellite | Secondary satellite |
| Name | Cosmos 2228 Rocket | CSL-04 DEB |
| Spacetrack catalog number | 22287 | 26218 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 17 19:12 | 2021 Apr 17 18:42 |
| Time of closest approach (UTC) | 2021 Mar 01 15:01:43.656 |
| Minimum distance | 1.165 km |
| Height difference | 1.058 km |
| Relative speed | 15.070 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 39.7°N, 121.2°W |
| Height | 659 km |
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