| Primary satellite | Secondary satellite |
| Name | Cosmos 1538 Rocket | deb Agena D |
| Spacetrack catalog number | 14760 | 4650 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 16 09:20 | 2021 Apr 16 07:37 |
| Time of closest approach (UTC) | 2021 Mar 03 14:43:27.727 |
| Minimum distance | 3.638 km |
| Height difference | -1.712 km |
| Relative speed | 14.824 km/s |
| Angle between velocity vectors | 167° |
| Geographic position | 60.0°S, 17.7°W |
| Height | 814 km |
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