Formulae. 1  Eclipsing binary: diameter = speed Ã time of eclipse. 2  Size from luminosity: star's radius/Sun's radius = (Sun's temperature/star's temperature)2 Sqrt[star's luminosity/Sun's luminosity].
MOA is a mathmatical concept that most firearm scopes incorporate. Minute of Angle (MOA) is critical to sighting in your scope. MOA mathematical concepts were used to develop the AccuScope scope sighting reference tool. The only MOA information needed to use AccuScope is your scope's MOA number.
Re: MRAD and MOA scope adjustments, please educate me. IF the reticle of the scope is in the First Focal Plane (FFP), then either a MOA, MIL, or Ballistic Reticle would remain the same subtension (distance between the lines or dots) when the magnification is changed.