| Primary satellite | Secondary satellite |
| Name | Cosmos 1603 | NOAA 16 DEB |
| Spacetrack catalog number | 15333 | 42426 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 10 02:44 | 2021 Apr 05 22:24 |
| Time of closest approach (UTC) | 2021 Mar 07 11:23:42.354 |
| Minimum distance | 32.397 km |
| Height difference | 3.570 km |
| Relative speed | 3.734 km/s |
| Angle between velocity vectors | 29° |
| Geographic position | 18.1°N, 36.9°W |
| Height | 859 km |
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