Eccentric and Epicyclic Theories of Indian Astronomy by Govind Kumar
All planets traverse in ellipses and epicycles and this came to be known as the Epicycles Theory.
In the above diagram, the circle A is the mean orbit of the planet. P is the mean Position of the planet and the small circle P is the epicycle.
The small epicycles traversed by a planet are calculated and the mandaphala, the equation of center is computed and added if the Manda Kendra is in between 180 and 360 and subtracted if the M K is
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