Talk:Circular orbit

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[edit] WTF

I don't know if I'm just retarded and I'm missing something complete obvious, but it seems to me that the speed is given by v=\sqrt{2\mu\over{r}} and not v=\sqrt{\mu\over{r}}. I mean, the kinetic energy is mv^2\over{2} and the potential energy is :-GMm\over{r}. On the orbit, total energy is minimized (E=0).

Therefore :v=\sqrt{2\mu\over{r}} .

This error carries on to the period. T=\pi\sqrt{2r^3\over{\mu}} not T=2\pi\sqrt{r^3\over{\mu}}

And also, if we're talking about circular orbits, might as well give the real orbital energy conservation equation {v^2\over{2}}-{\mu\over{r}}=0 . I have no clue why it was equal to something other than 0 before.

It's as if someone went through this and purposely screwed things up. Anyway I cleaned things up.

Headbomb 03:22, 17 May 2007 (UTC)

The energy is not zero. The formulas were correct.--Patrick 12:53, 22 June 2007 (UTC)

[edit] Equation of Motion, delta V and Virial theorem

The equation of motion became redundant, and I really don't see what mentionning the Virial theorem or the delta V brought to the topic. Headbomb 03:33, 17 May 2007 (UTC)

I restored it.--Patrick 12:58, 22 June 2007 (UTC)

[edit] Orbital velocity in general relativity

Is the orbital velocity of circular orbits in general relativity exactly the same as in the Newtonian case or are there any subtle differences? Agge1000 12:57, 11 November 2007 (UTC)