An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Pogson's ratio
  وابر ِ پوگسون  
vâbar-e Pogson
Fr.: rapport de Pogson  

The constant 2.512, which is the 5th → root of 100 (2.5125 = 100); the ratio between two successive stellar → magnitudes.

See also: → Pogson’s relation; → ratio.