Radar and Infrasound Observations of the 2026 May 30 Cape Cod Bay Superbolide
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Juha Vierinen, Ryan Volz, Marc Fries, Elizabeth A. Silber, Sarah Albert, Philip J. Erickson et al. · arXiv: 2610.24566v1 · Summary page
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Following a daylight fireball toward the sea
A study of the 30 May 2026 Cape Cod Bay superbolide combines three kinds of evidence to follow an incoming space rock through the atmosphere. Meteor radar tracked the plasma surrounding its head between roughly 90 and 71 kilometres altitude, while echoes from its wake extended down to about 30 kilometres—an unusually low radar endpoint that the researchers interpret as the expected breakup region. Weather radars then detected falling meteorites, helping place the likely fall region in Cape Cod Bay and constrain probable fragment sizes.
Infrasound recordings independently support the terminal fragmentation region and give an energy estimate equivalent to 0.5 kiloton of TNT. Together, the observations are consistent with a dense, mechanically strong object, possibly rich in iron. Its reconstructed orbit lies near the boundaries between empirical cometary and asteroidal classifications, with different criteria giving conflicting answers; no convincing parent body or established meteor shower was identified. The preprint demonstrates how complementary instruments can connect an object’s pre-impact orbit to its atmospheric breakup and nearly to the ground.
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