| Primary satellite | Secondary satellite |
| Name | NOAA 15 | CSL-04 DEB |
| Spacetrack catalog number | 25338 | 26211 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Feb 25 20:59 | 2021 Feb 25 06:15 |
| Time of closest approach (UTC) | 2021 Jan 19 10:13:33.611 |
| Minimum distance | 22.469 km |
| Height difference | 2.647 km |
| Relative speed | 11.958 km/s |
| Angle between velocity vectors | 105° |
| Geographic position | 75.3°N, 7.7°W |
| Height | 820 km |
|