Breakthrough Listen 3I/ATLAS technosignature search — NULL (2026).
documentedpublicationSETI & Technosignatures
Radio technosignature search of interstellar object 3I/ATLAS around its ~Dec 2025 closest approach returned NO credible narrowband signal; all 9 flagged events traced to RFI / off-target sources.
A detection ATTEMPT that produced a NULL result — strengthens the skeptic/terrestrial layer. Not yet peer-reviewed. Consensus on 3I/ATLAS itself is a natural comet (CO2/water-ice outgassing); Loeb holds it at Scale-4 pending post-perihelion data.