Jisho

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小惑星番号
Wikipedia definition
1. Minor planet designationFormal minor planet designations are number–name combinations overseen by the Minor Planet Center, a branch of the IAU. They are used for dwarf planets and small Solar System bodies such as asteroids, but not comets. They are assigned to a body once its orbit is secured, and are unrelated to provisional designations, which are automatically assigned when an object is discovered.
Read “Minor planet designation” on English Wikipedia
Read “小惑星番号” on Japanese Wikipedia
Read “Minor planet designation” on DBpedia

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