Talk:Astrodynamics/Motion Constants

Angular momentum is proportional to mass. Either the equations for h should be updated to include mass, or the article should explain why they are absent.
 * Section added at the beginning of the article to address this - Jaxcp3 (discuss • contribs) 00:05, 6 July 2013 (UTC)

Derivative notation?
Is there any particular reason why the "prime" notation is being used instead of "dot" notation for derivatives, i.e. $$r'$$ as opposed to $$\dot{r}$$?

Dot notation (aka Newton notation) is generally used for time derivatives and it is consistently used in probably all of the texts I have on the topic of this book (Bate,Mueller&White, etc). It is also slightly more aesthetic, but that is just my opinion

http://en.wikipedia.org/wiki/Notation_for_differentiation

Jaxcp3 (discuss • contribs) 21:23, 3 July 2013 (UTC)

derivation of Kepler's laws
I added a section on Kepler's laws. I'm not sure if this is the best place for that section, but I didn't want to crowd the information in Orbit Basics. I'm not sure if there is enough content in this section for it to be its own chapter though. Jaxcp3 (discuss • contribs) 15:40, 6 August 2013 (UTC)