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.
MOA is an acronym for Minute of Angle.. As said elsewhere, 1 MOA is 1/60th of 1 degree. In practical terms, a 1OA degree of accuracy means your group will open up 1 inch for every 100 yards of distance.So, at 100 yards, a 3 MOA rifle would make a group of holes that fit within a 3 inch circle.eport Abuse. MOA is an acronym for Minute of Angle.. As said elsewhere, 1 MOA is 1/60th of 1 degree. In practical terms, a 1OA degree of accuracy means your group will open up 1 inch for every 100 yards of distance. So, at 100 yards, a 3 MOA rifle would make a group of holes that fit within a 3 inch circle.