| Primary satellite | Secondary satellite |
| Name | MOMENTUS-X1 | OTTER PUP |
| Spacetrack catalog number | 44408 | 56933 |
| Radar cross section | medium | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 22 23:25 | 2024 Dec 22 21:38 |
| Time of closest approach (UTC) | 2024 Dec 28 16:35:52.609 |
| Minimum distance | 0.729 km |
| Height difference | 0.678 km |
| Relative speed | 13.315 km/s |
| Angle between velocity vectors | 122° |
| Geographic position | 74.2°S, 166.5°E |
| Height | 489 km |
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