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Potentially hazardous object

asteroid or comet with an orbit such that it has the potential to make close approaches to the Earth

Pronunciation
/pəˈtɛntʃəli ˈhæzərdəs ˈɑbʤɛkt/
/pəˈtɛnʃəli ˈhazədəs ˈɒbʤɪkt/