| Primary satellite | Secondary satellite |
| Name | Cosmos 2151 Rocket | HYSIS |
| Spacetrack catalog number | 21423 | 43719 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 19 16:56 | 2021 Jan 19 16:41 |
| Time of closest approach (UTC) | 2020 Dec 01 19:26:19.906 |
| Minimum distance | 2.399 km |
| Height difference | 0.522 km |
| Relative speed | 15.057 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 43.7°S, 149.4°W |
| Height | 652 km |
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