礪石三,即金牛座χ(χ Tau,χ Tauri)是一對位於金牛座的雙星,距離地球約268光年。
礪石三由一個分光雙星系統組成,主星礪石三A是一顆藍白色B-型主序星,視星等為+5.38。伴星礪石三B是一顆視星等為+7.6的黃色G-型主序星,距離主星19角秒。
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