An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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personal equation
  هموگش ِ تنومی  
hamugeš-e tanumi
Fr.: équation personnelle  

A systematic observational error due to the characteristics of the observer.

See also: Personal, adj. of → person; → equation.