NASA Identifies Near-Earth Object as Comet, Impacting Planetary Defense Strategies
NASA scientists have reclassified a near-Earth object, previously thought to be an asteroid, as a comet. The object, known as 1998 SH2, was observed to have irregular motion, prompting further investigation. Using optical astrometry and powerful observatories, researchers confirmed that 1998 SH2 exhibits comet-like activity, such as venting gas, which affects its trajectory. This discovery was detailed in a study published in Nature Astronomy. The object had been tracked since 1998, but recent observations during its close approach to Earth in August 2025 provided the necessary data to confirm its cometary nature. The study highlights the importance of continuous tracking of near-Earth objects to accurately assess their nature and potential impact risks.