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11/18/17 at 22:43:13
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Trappist 1 seven planet system (Read 1713 times)
frankuitaalst
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Trappist 1 seven planet system
02/23/17 at 13:01:54
 
http://photojournal.jpl.nasa.gov/catalog/PIA21425
Trappist -1 is so much fun .  
I know trappist being an excellent beer  
https://en.wikipedia.org/wiki/Trappist_beer.  
Now it even hosts 7 planets !  
In annex a simulation using the GravSim Console .  
The initial setting were taken from the document "eso1706a.pdf " .  
 
In the sim all planets were set to a diameter of 6300 km .  
Mean anomaly were choosen at random , eccentricities to zero and inclinations to zero .  
I think it must be fun to investigate the resonances in rotating frame .  
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Tony
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Re: Trappist 1 seven planet system
Reply #1 - 02/23/17 at 16:32:02
 
Nice work!
 
Here's a simulation for the browser version:
http://orbitsimulator.com/gravitySimulatorCloud/simulations/1487806670373_trappi st1.html
 
I set the eccentricities to their maximum values. Change the word "stationary" in the dropdown list to one of the planets to rotate the frame. I see a few possible resonances.
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frankuitaalst
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Re: Trappist 1 seven planet system
Reply #2 - 02/25/17 at 10:13:30
 
Curious about the mutual orbital influences I ran the first  sim for about 40 years .  
The system seems remarkably stable . Influences are small.  
I tried to find some strong influences , but it seems orbital influences are not easy to find , and are weak ( low mass planets ) .  
The plot hereunder seems to indicate couple -wise influences between neighbours.
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Trappist_1_Sma_Relative_PNG.PNG
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