| Primary satellite | Secondary satellite |
| Name | FLOCK 4BE 28 | COSMOS 1220 DEB |
| Spacetrack catalog number | 60519 | 25795 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 19:00 | 2024 Dec 23 04:30 |
| Time of closest approach (UTC) | 2024 Dec 24 02:36:05.951 |
| Minimum distance | 3.635 km |
| Height difference | -3.619 km |
| Relative speed | 4.409 km/s |
| Angle between velocity vectors | 34° |
| Geographic position | 15.0°N, 61.1°W |
| Height | 494 km |
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