| Primary satellite | Secondary satellite |
| Name | Cosmos 1331 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 13028 | 33764 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Mar 06 08:53 | 2021 Mar 06 12:16 |
| Time of closest approach (UTC) | 2021 Jan 25 00:00:11.444 |
| Minimum distance | 4.650 km |
| Height difference | 2.301 km |
| Relative speed | 14.343 km/s |
| Angle between velocity vectors | 147° |
| Geographic position | 14.9°S, 179.4°W |
| Height | 760 km |
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