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Dawes limit





An empirical formula derived by the English amateur astronomer William Dawes (1799–1868) that gives the smallest angular separation of two stars in which each is still observable with a telescope of given aperture. The Dawes limit in arcseconds is 11.6/D, where D is the aperture of the telescope in centimeters.


Related entries

   • Rayleigh criterion
   • resolution


Related category

   • OPTICS AND OPTICAL PHENOMENA