九執曆，宿曜經

九曜，天文学名词，原指北斗七星及辅佐二星，亦称“九執”。在印度占星体系中对应“Navagraha”，即日、月、五星七星，加上罗睺、计都（黄道和白道两个平面的交点）。

中国民间信仰中演化为九位星君，包含金、木、水、火、土五大行星与太阳、（太阴）月亮及罗睺、计都二隐曜，被认为可主宰人间吉凶。

《九执历》是中国唐朝《开元占经》中译载的一部印度历法。

它原为印度历法，于唐代传入中国，在开元六年（718年）由印度裔天文学家瞿昙悉达奉旨编译成中文。

開元占經卷104

ctext

宿矅經 baidu

该经以古代印度天文历法为基础，将黄道分为十二宫与二十七宿，并结合日月五星（七曜）的运行位置记载吉凶宜忌等内容，属于古代星占术类文献。

文殊菩薩梵語：मञ्जुश्री，Mañjuśrī

《開元占經》記載的石氏度數中，井宿原本為33度，觜宿為2度。唐代一行重測後才改定觜宿為1度；宋皇祐年間重測才將井宿改為34度，參見潘鼐《中國恆星觀測史》，頁197、243。 >>>是否，跟據現今說法，為了由印度時區改到中國時區？

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