| Primary satellite | Secondary satellite |
| Name | GPS 2-15 Rocket1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 22109 | 40806 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 16 09:38 | 2021 Apr 15 14:01 |
| Time of closest approach (UTC) | 2021 Mar 06 13:53:59.830 |
| Minimum distance | 497.424 km |
| Height difference | -5.267 km |
| Relative speed | 6.989 km/s |
| Angle between velocity vectors | 55° |
| Geographic position | 4.7°N, 74.3°W |
| Height | 621 km |
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