| Primary satellite | Secondary satellite |
| Name | N. Korean satellite | FLOCK 3R 8 |
| Spacetrack catalog number | 39026 | 43727 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Jan 16 03:32 | 2021 Jan 16 04:38 |
| Time of closest approach (UTC) | 2020 Dec 09 08:17:21.641 |
| Minimum distance | 373.128 km |
| Height difference | 1.276 km |
| Relative speed | 9.955 km/s |
| Angle between velocity vectors | 82° |
| Geographic position | 78.9°N, 93.1°E |
| Height | 496 km |
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