| Primary satellite | Secondary satellite |
| Name | SL-08 R/B | deb Agena D |
| Spacetrack catalog number | 27819 | 4768 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 21 04:21 | 2021 Apr 21 08:31 |
| Time of closest approach (UTC) | 2021 Mar 02 18:17:23.589 |
| Minimum distance | 30.692 km |
| Height difference | 1.702 km |
| Relative speed | 13.335 km/s |
| Angle between velocity vectors | 131° |
| Geographic position | 80.1°N, 163.2°E |
| Height | 1028 km |
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