Eos family - Eos tribe (English spelling)
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A family of asteroids. Asteroids in the same family have roughly the same semi-major axis, eccentricity, and orbital inclination. They are thought to be a group of fragments that were formed when a single asteroid broke apart. They were discovered by Seiji Hirayama. (→ Hirayama Family ) Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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小惑星の族の一つ。同族の小惑星は，軌道長半径，離心率，軌道傾斜がほぼ等しい。もともと1つの小惑星が分裂してできた破片の集団と考えられている。平山清次が発見した。 (→平山族 )
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