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HOSTING A TOTAL OF 318 FORMULAS WITH CALCULATORS

Length of Star Trail

f*e*(2Π) t*cos(d*Π 180)*1000 p

The values needed for solving this formula are : f = focal length of lens scope, e = exposure length, l = length of sidereal day, in same units as the e, d = declination of the star. if you do not want the end unit to be pixels as you are not using CCD, then place p = 1

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