| Primary satellite | Secondary satellite |
| Name | MOMENTUS-X1 | Cosmos 405 Rocket |
| Spacetrack catalog number | 44408 | 5118 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 23:25 | 2024 Dec 22 21:56 |
| Time of closest approach (UTC) | 2024 Dec 27 14:03:16.937 |
| Minimum distance | 1.000 km |
| Height difference | 0.686 km |
| Relative speed | 14.312 km/s |
| Angle between velocity vectors | 140° |
| Geographic position | 81.1°S, 173.1°E |
| Height | 491 km |
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