| Primary satellite | Secondary satellite |
| Name | Cosmos 1500 Rocket | COSMOS 2523 |
| Spacetrack catalog number | 14373 | 42986 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Apr 16 20:13 | 2021 Apr 16 19:28 |
| Time of closest approach (UTC) | 2021 Mar 04 16:28:59.946 |
| Minimum distance | 65.928 km |
| Height difference | -1.423 km |
| Relative speed | 8.729 km/s |
| Angle between velocity vectors | 71° |
| Geographic position | 76.6°N, 39.8°E |
| Height | 617 km |
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