User talk:John Ripfield
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Hello, John Ripfield, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:
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I hope you enjoy editing here and being a Wikipedian! Please sign your messages on discussion pages using four tildes (~~~~); this will automatically insert your username and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or ask your question on this page and then place {{help me}} before the question. Again, welcome!--MollyPollyRolly (talk) 14:52, 26 July 2021 (UTC)
Edit to Kepler's equaiton[edit]
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)