IM1 / CNEOS 2014-01-08 meteor.
disputedscientific_anomalyScientific Instrumentation & Sensor Data
~0.5 m bolide over the Pacific (2014) that Loeb & Siraj claimed is interstellar from US-government velocity data; trajectory basis contested.
Loeb and Amir Siraj argued the bolide USG 20140108 came from outside the solar system based on its CNEOS-reported speed, renaming it IM1. US Space Command later issued a memo supporting the interstellar interpretation. Critics question the velocity uncertainties and whether any solid fragment could survive a >28 km/s atmospheric entry. The site became the target of Loeb's 2023 spherule expedition. **Replication status:** disputed · velocity contested — Siraj & Loeb material-strength/velocity argument (ApJL) is peer-reviewed but the interstellar interpretation is rebutted: CNEOS reports no error bars; velocity uncertainties swamp the hyperbolic excess (Hajduková et al., A&A 691 A8).