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Message started by frankuitaalst on 10/07/14 at 13:58:57

Title: Funny starlike orbit
Post by frankuitaalst on 10/07/14 at 13:58:57

I was playing recently with a binary system
( the two red planets which orbit their commom barycenter ( red dot in the middle) , see picture ).
In the sim the yellow test particle was orbiting the binary .

From this orbiting partcle I detached another particle , the red  one .
It moved to the binary , got some sweeps , formed a star-like orbit ...
I guessed it would crash soon with one of the binaries or being ejected from the system .
To my surprise however the particle kept forming its star like orbits , with a nice pattern , changing its orbit with every pass a little ..
But t kept going ...

I've seen analogue orbits earlier , but never saw such an orbit for a particle which was releaed at a random position , at random velocity , around a random generated binary .
Funny .  

Whished I had saved the sim .
Fortunately I made a screenshot .

Title: Re: Funny starlike orbit
Post by Tony on 10/07/14 at 17:55:03

If it is the last sim you ran, it will be saved as resume.gsim and will open when you run gravity simulator again.
Otherwise, I don't know why its doing that.

edit:
It's doing that because you've locked one of your primaries to the center of the screen rather than the system barycenter.
Press the F button on the Graphics Options interface.

Title: Re: Funny starlike orbit
Post by frankuitaalst on 10/08/14 at 04:39:54


Tony wrote:
If it is the last sim you ran, it will be saved as resume.gsim and will open when you run gravity simulator again.
Otherwise, I don't know why its doing that.
edit:
It's doing that because you've locked one of your primaries to the center of the screen rather than the system barycenter.
Press the F button on the Graphics Options interface.

Well , I ran this application not with GSim , but with a simulator I wrote by my own.
It lets detach a probe from an Orbiter at command input , so I'm not sure anymore when I hitted the detach button and the probe was created .
I wanted to simulate the Rosetta's landing on 67P . In GSim this isn't easy as we have a rather complex object and complex gravity potential field.

On your edit : The screenshot was made with the barycenter of the binary kept in the middle . So both  binary stars are in orbit around their COG.

Maybe if I repeat the sim I can get the same result after let's say 100 tries , not sure about this .
What I tried to say is that imo this orbit is a realistic orbit and not an "engineered ,well defined" orbit .

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