Producing satellite chart using RK4 doesn't seem to work as in example

[turukawa]

Hi ... realise you've moved on from this example, but I'm attempting to model a solar yacht race around the sun and your satellite in a decaying orbit seems a useful way to start. The chart you show on http://www.cyber-omelette.com/2017/02/RK4.html doesn't seem to emerge when I run your code, though, and I was wondering what changes you made to produce it?

[benrules2]

Hi turukawa, that is interesting as I am not aware of having made any changes... I might have zoomed in on the matplot lib output though, and rotated things around a bit.

What is the output like that you are getting?

[turukawa]

I get the following:

with sun and sat as follows:

sat = {"location": point(0, 1.0e10, 0), "mass":1e23, "velocity":point(3e4, 0, 0)}
sun = {"location":point(0,0,0), "mass":2e30, "velocity":point(0,0,0)}