| Primary satellite | Secondary satellite |
| Name | Cosmos 1515 Rocket | CZ-4 DEB |
| Spacetrack catalog number | 14552 | 35376 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 18 12:14 | 2021 Apr 18 11:30 |
| Time of closest approach (UTC) | 2021 Mar 06 01:33:45.079 |
| Minimum distance | 4.901 km |
| Height difference | 4.486 km |
| Relative speed | 15.140 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 46.7°S, 49.8°E |
| Height | 628 km |
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