| Primary satellite | Secondary satellite |
| Name | Cosmos 1603 | NOAA 16 DEB |
| Spacetrack catalog number | 15333 | 42375 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 10 02:44 | 2021 Apr 10 11:38 |
| Time of closest approach (UTC) | 2021 Mar 05 08:38:33.107 |
| Minimum distance | 55.920 km |
| Height difference | -2.484 km |
| Relative speed | 3.734 km/s |
| Angle between velocity vectors | 29° |
| Geographic position | 17.8°S, 23.6°E |
| Height | 856 km |
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