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Fig. 2.

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Differential flux versus size based on Ulysses and Galileo spacecraft confident ISD detections Baalmann et al. 2025, hyperbolic meteor radar 3σ constraint in CMOR Froncisz et al. 2020, estimated > 100 μm objects impacting the Earth from α Centauri Gregg & Wiegert 2025, optical meteor upper limit in GMN Wiegert et al. 2025, estimated flux at Earth of objects from asymptotic giant branch (AGB) stars, young stellar objects (YSOs), and young main-sequence stars (YMSs; Murray et al. 2004), observed sporadic meteors on Earth with interplanetary orbits Ceplecha 1988, 1I/‘Oumuamua-like object flux Hajduková et al. 2019, and 3I/ATLAS-like object (this work). Linear fit fluxes are depicted for r−3.0 Jewitt & Seligman 2023, r−2.7 to match 1I and 3I with hyperbolic radar meteors, and r−2.3 to match 1I and 3I with upper limit hyperbolic optical meteors.

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