| Primary satellite | Secondary satellite |
| Name | SL-08 R/B | deb Delta |
| Spacetrack catalog number | 27819 | 21325 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 21 04:21 | 2021 Apr 20 15:31 |
| Time of closest approach (UTC) | 2021 Mar 03 11:50:01.011 |
| Minimum distance | 22.798 km |
| Height difference | -1.030 km |
| Relative speed | 14.615 km/s |
| Angle between velocity vectors | 173° |
| Geographic position | 67.8°N, 73.7°W |
| Height | 1021 km |
|