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.
Best Answer: The MSA is established as a minimum safe altitude in the event of lost navigation capability, or navigational disorientation (being lost).eport Abuse. MSA simply provides a safe altitude, or series of safe altitudes. If I remember correctly, at the msa you are guaranteed 1,000' over any obstacle and terrain. The 25nm example you give is a 25nm radius from whatever the point is.