| Primary satellite | Secondary satellite |
| Name | Cosmos 2151 Rocket | JILIN 1 |
| Spacetrack catalog number | 21423 | 40961 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 15 04:12 | 2021 Jan 15 11:56 |
| Time of closest approach (UTC) | 2020 Nov 30 07:30:42.184 |
| Minimum distance | 4.694 km |
| Height difference | 1.515 km |
| Relative speed | 15.015 km/s |
| Angle between velocity vectors | 173° |
| Geographic position | 81.7°S, 76.5°W |
| Height | 669 km |
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