|5.188.211.35|5.188.211.35\cさん＆Logan|I do some voluntary work http://fittor.fun/oop-in-tocking/ wwwxxxwwxx If you asked the question â??How old is the asteroid Vesta?â?? the answer would be 4.565 ± 0.001 billion years. Scientists can state this so precisely because the global melting of the asteroid Vesta as sampled by a group of meteorites known as eucrites happened so quickly that the age was frozen in precisely in the rocks formed during this event. Furthermore no later significant geologic events happened to disturb the age recorded by the rocks because Vesta is too small to retain enough interior heat to allow further melting/volcanism. さんの一首