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.
The following summary defines what to look out for in rimfire riflescopes and characteristics that are noteworthy: 1  One-quarter MOA (click adjustments) â Seen in all rimfire scopes. 2  Filled and Sealed with Nitrogen â Seen in all rimfire scopes. 3  Dimension of 1 inches for main tube diameter â Seen in all rimfire scopes.