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474 knots is about one-one-hundred-fiftieth as fast as a Meteor
In other words, it's 0.006 times the speed of a Meteor, and the speed of a Meteor is 170 times that amount.
(formally Meteoroid or meteorite, depending on the context; a.k.a. "shooting star", a.k.a. "falling star")
Small meteoroids enter the Earth's atmosphere at speeds between 22,000 knots and 140,000 knots, depending on their size. The fireball effect, known as ablation, ceases once the atmosphere has slowed the meteoroid to a velocity of about 5,400 knots.
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