| Primary satellite | Secondary satellite |
| Name | Cosmos 1515 Rocket | deb Kosmos-1110 |
| Spacetrack catalog number | 14552 | 14866 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 18 12:14 | 2021 Apr 18 13:30 |
| Time of closest approach (UTC) | 2021 Mar 04 16:04:43.149 |
| Minimum distance | 64.002 km |
| Height difference | -4.210 km |
| Relative speed | 12.995 km/s |
| Angle between velocity vectors | 119° |
| Geographic position | 65.7°N, 140.5°W |
| Height | 625 km |
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