potentially hazardous object
Sign in to saveAlso known as PHO, Potentially Hazardous Comet, Potentially Hazardous Comets, PHCs
asteroid or comet with an orbit such that it has the potential to make close approaches to the Earth
Also known as PHO, Potentially Hazardous Comet, Potentially Hazardous Comets, PHCs
asteroid or comet with an orbit such that it has the potential to make close approaches to the Earth