| Primary satellite | Secondary satellite |
| Name | Cosmos 923 Rocket | DMSP 5D-2 F13 DEB |
| Spacetrack catalog number | 10121 | 40463 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 13 05:20 | 2021 Apr 12 09:01 |
| Time of closest approach (UTC) | 2021 Mar 04 22:53:05.293 |
| Minimum distance | 98.423 km |
| Height difference | 1.115 km |
| Relative speed | 5.876 km/s |
| Angle between velocity vectors | 46° |
| Geographic position | 56.6°N, 171.2°E |
| Height | 775 km |
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