User talk:John Ripfield

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Edit to Kepler's equaiton
In this edit you changed an equation but did not change the source. Please explain what source you used to verify the equation. Jc3s5h (talk) 16:01, 19 February 2022 (UTC)


 * The source is cited incorrectly. The fraction 2/m was missing. For example: the coefficient for sin(3*M) should read 2/3*J_3(3*e)=3/8*e^3-27/128*e^5+243/5120*e^7-243/40960*e^9+... (i.e. 2/3 times the power series expansion of the third order Bessel function of the first kind with argument 3*e).
 * Compare with ref. https://en.wikipedia.org/wiki/Equation_of_the_center. John Ripfield (talk) 17:26, 7 April 2022 (UTC)