Last Updated：2025/11/28
(astronomy) A near-Earth asteroid or comet with an orbit such that it has the potential to make close approaches to the Earth and is of a size large enough to cause significant regional damage in the event of impact.
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potentially hazardous object
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Source Word
potentially hazardous object
Noun
Japanese Meaning
（天文学） 地球に接近する軌道を持ち、もし衝突が起きた場合に地域的な大きな被害をもたらす可能性のある、小惑星や彗星を指す。
（ plural ）
