Yarkovsky effect is a recoil force arising from the anisotropic thermal re-emission of absorbed solar radiation. This recoil force causes wide orbital change making it hard for the scientists to predict the orbit of potentially hazardous asteroids and their long term risk to the Earth. Developing mathematics in order to calculate Yarkovsky effect in an efficient and simple way without getting into higher level astronomy, mathematics and physics is our main purpose. We have tried to give the insights about Yarkovsky effect and mathematics behind it using the simple concepts of Stefan Boltzmann law and Yarkovsky effect in a way so that even a high school student, amateur astronomers know about Yarkovsky effect and how it can be measured.