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.
On a scope represented to have 100 moa of internal adjustment, you should come darn close to 100 moa represented by what-ever incremental division is said to be on the turrets. On a 1/4 moa scope, you are in for a lot of clicking as FOUR clicks equals ONE moa.