| Primary satellite | Secondary satellite |
| Name | ARGOS Delta rocket | DMSP 5D-2 F11 DEB |
| Spacetrack catalog number | 25637 | 28322 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 05 20:21 | 2021 Mar 05 17:34 |
| Time of closest approach (UTC) | 2021 Jan 20 19:53:42.694 |
| Minimum distance | 126.864 km |
| Height difference | 3.541 km |
| Relative speed | 12.681 km/s |
| Angle between velocity vectors | 118° |
| Geographic position | 76.1°S, 86.4°E |
| Height | 860 km |
|