《Tetrabiblos》The Periodical Divisions Of TimeClaudius Ptolemy（Ashmand 英譯 1822）
One of the forms of this aspect is called the oriental, succedent setting, invisible; when the star sets immediately after the Sun’s rising: another is the precise oriental co-setting, when the star sets at the moment of the Sun’s rising: another is the oriental, precedent, and visible setting, when the Sun does not rise until immediately after the setting of the star.
段落 tetra-4-theperiodi-72public-domain (Ashmand 1822)
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