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Reference.org
Ordinary chondrite
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<p>The ordinary chondrites (sometimes called the O chondrites) are a class of stony <a href="/facts/Chondritic/mbzbGm5A">chondritic</a> <a href="/facts/Meteorite/NsmHlBlX">meteorites</a>. They are by far the most numerous group, comprising 87% of all finds. Hence, they have been dubbed "ordinary". The ordinary chondrites are thought to have originated from three parent asteroids, with the fragments making up the <a href="/facts/H_chondrite/gDBzNlDt">H chondrite</a>, <a href="/facts/L_chondrite/BtFAdhG8">L chondrite</a> and <a href="/facts/LL_chondrite/cjvjBo05">LL chondrite</a> groups respectively. </p>